Commit 9142482372

Meghan Denny <hello@nektro.net>
2025-02-10 05:21:31
std.ArrayList: popOrNull() -> pop() [v2] (#22720)
1 parent 75df7e5
lib/compiler/aro/aro/pragmas/gcc.zig
@@ -103,7 +103,7 @@ fn diagnosticHandler(self: *GCC, pp: *Preprocessor, start_idx: TokenIndex) Pragm
             try pp.comp.diagnostics.set(str[2..], new_kind);
         },
         .push => try self.options_stack.append(pp.comp.gpa, pp.comp.diagnostics.options),
-        .pop => pp.comp.diagnostics.options = self.options_stack.popOrNull() orelse self.original_options,
+        .pop => pp.comp.diagnostics.options = self.options_stack.pop() orelse self.original_options,
     }
 }
 
lib/compiler/aro/aro/pragmas/pack.zig
@@ -149,7 +149,7 @@ fn pop(pack: *Pack, p: *Parser, maybe_label: ?[]const u8) void {
             }
         }
     } else {
-        const prev = pack.stack.popOrNull() orelse {
+        const prev = pack.stack.pop() orelse {
             p.pragma_pack = 2;
             return;
         };
lib/compiler/aro/aro/Preprocessor.zig
@@ -2446,7 +2446,7 @@ pub fn expandedSlice(pp: *const Preprocessor, tok: anytype) []const u8 {
 
 /// Concat two tokens and add the result to pp.generated
 fn pasteTokens(pp: *Preprocessor, lhs_toks: *ExpandBuf, rhs_toks: []const TokenWithExpansionLocs) Error!void {
-    const lhs = while (lhs_toks.popOrNull()) |lhs| {
+    const lhs = while (lhs_toks.pop()) |lhs| {
         if ((pp.comp.langopts.preserve_comments_in_macros and lhs.id == .comment) or
             (lhs.id != .macro_ws and lhs.id != .comment))
             break lhs;
@@ -2676,7 +2676,7 @@ fn defineFn(pp: *Preprocessor, tokenizer: *Tokenizer, define_tok: RawToken, macr
         tok = tokenizer.nextNoWS();
         if (tok.id == .ellipsis) {
             try pp.err(tok, .gnu_va_macro);
-            gnu_var_args = params.pop();
+            gnu_var_args = params.pop().?;
             const r_paren = tokenizer.nextNoWS();
             if (r_paren.id != .r_paren) {
                 try pp.err(r_paren, .missing_paren_param_list);
lib/compiler/build_runner.zig
@@ -1190,7 +1190,7 @@ pub fn printErrorMessages(
     const ttyconf = options.ttyconf;
     try ttyconf.setColor(stderr, .dim);
     var indent: usize = 0;
-    while (step_stack.popOrNull()) |s| : (indent += 1) {
+    while (step_stack.pop()) |s| : (indent += 1) {
         if (indent > 0) {
             try stderr.writer().writeByteNTimes(' ', (indent - 1) * 3);
             try printChildNodePrefix(stderr, ttyconf);
lib/docs/wasm/markdown/Parser.zig
@@ -816,7 +816,7 @@ fn isThematicBreak(line: []const u8) bool {
 }
 
 fn closeLastBlock(p: *Parser) !void {
-    const b = p.pending_blocks.pop();
+    const b = p.pending_blocks.pop().?;
     const node = switch (b.tag) {
         .list => list: {
             assert(b.string_start == p.scratch_string.items.len);
lib/std/Build/Step/ConfigHeader.zig
@@ -616,7 +616,7 @@ fn expand_variables_cmake(
                     // no open bracket, preserve as a literal
                     break :blk;
                 }
-                const open_pos = var_stack.pop();
+                const open_pos = var_stack.pop().?;
                 if (source_offset == open_pos.source) {
                     source_offset += open_var.len;
                 }
lib/std/debug/Dwarf/expression.zig
@@ -527,14 +527,14 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.@"and" => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = try self.stack.pop().asIntegral();
+                    const a = try self.stack.pop().?.asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = a & try self.stack.items[self.stack.items.len - 1].asIntegral(),
                     };
                 },
                 OP.div => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a: isize = @bitCast(try self.stack.pop().asIntegral());
+                    const a: isize = @bitCast(try self.stack.pop().?.asIntegral());
                     const b: isize = @bitCast(try self.stack.items[self.stack.items.len - 1].asIntegral());
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = @bitCast(try std.math.divTrunc(isize, b, a)),
@@ -542,14 +542,14 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.minus => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const b = try self.stack.pop().asIntegral();
+                    const b = try self.stack.pop().?.asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = try std.math.sub(addr_type, try self.stack.items[self.stack.items.len - 1].asIntegral(), b),
                     };
                 },
                 OP.mod => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a: isize = @bitCast(try self.stack.pop().asIntegral());
+                    const a: isize = @bitCast(try self.stack.pop().?.asIntegral());
                     const b: isize = @bitCast(try self.stack.items[self.stack.items.len - 1].asIntegral());
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = @bitCast(@mod(b, a)),
@@ -557,7 +557,7 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.mul => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a: isize = @bitCast(try self.stack.pop().asIntegral());
+                    const a: isize = @bitCast(try self.stack.pop().?.asIntegral());
                     const b: isize = @bitCast(try self.stack.items[self.stack.items.len - 1].asIntegral());
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = @bitCast(@mulWithOverflow(a, b)[0]),
@@ -581,14 +581,14 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.@"or" => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = try self.stack.pop().asIntegral();
+                    const a = try self.stack.pop().?.asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = a | try self.stack.items[self.stack.items.len - 1].asIntegral(),
                     };
                 },
                 OP.plus => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const b = try self.stack.pop().asIntegral();
+                    const b = try self.stack.pop().?.asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = try std.math.add(addr_type, try self.stack.items[self.stack.items.len - 1].asIntegral(), b),
                     };
@@ -602,7 +602,7 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.shl => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = try self.stack.pop().asIntegral();
+                    const a = try self.stack.pop().?.asIntegral();
                     const b = try self.stack.items[self.stack.items.len - 1].asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = std.math.shl(usize, b, a),
@@ -610,7 +610,7 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.shr => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = try self.stack.pop().asIntegral();
+                    const a = try self.stack.pop().?.asIntegral();
                     const b = try self.stack.items[self.stack.items.len - 1].asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = std.math.shr(usize, b, a),
@@ -618,7 +618,7 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.shra => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = try self.stack.pop().asIntegral();
+                    const a = try self.stack.pop().?.asIntegral();
                     const b: isize = @bitCast(try self.stack.items[self.stack.items.len - 1].asIntegral());
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = @bitCast(std.math.shr(isize, b, a)),
@@ -626,7 +626,7 @@ pub fn StackMachine(comptime options: Options) type {
                 },
                 OP.xor => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = try self.stack.pop().asIntegral();
+                    const a = try self.stack.pop().?.asIntegral();
                     self.stack.items[self.stack.items.len - 1] = .{
                         .generic = a ^ try self.stack.items[self.stack.items.len - 1].asIntegral(),
                     };
@@ -641,7 +641,7 @@ pub fn StackMachine(comptime options: Options) type {
                 OP.ne,
                 => {
                     if (self.stack.items.len < 2) return error.InvalidExpression;
-                    const a = self.stack.pop();
+                    const a = self.stack.pop().?;
                     const b = self.stack.items[self.stack.items.len - 1];
 
                     if (a == .generic and b == .generic) {
@@ -667,7 +667,7 @@ pub fn StackMachine(comptime options: Options) type {
                     const branch_offset = operand.?.branch_offset;
                     const condition = if (opcode == OP.bra) blk: {
                         if (self.stack.items.len == 0) return error.InvalidExpression;
-                        break :blk try self.stack.pop().asIntegral() != 0;
+                        break :blk try self.stack.pop().?.asIntegral() != 0;
                     } else true;
 
                     if (condition) {
@@ -1080,7 +1080,7 @@ test "DWARF expressions" {
 
         for (0..32) |i| {
             const expected = 31 - i;
-            try testing.expectEqual(expected, stack_machine.stack.popOrNull().?.generic);
+            try testing.expectEqual(expected, stack_machine.stack.pop().?.generic);
         }
     }
 
@@ -1141,7 +1141,7 @@ test "DWARF expressions" {
 
         _ = try stack_machine.run(program.items, allocator, context, 0);
 
-        const const_type = stack_machine.stack.popOrNull().?.const_type;
+        const const_type = stack_machine.stack.pop().?.const_type;
         try testing.expectEqual(die_offset, const_type.type_offset);
         try testing.expectEqualSlices(u8, type_bytes, const_type.value_bytes);
 
@@ -1162,7 +1162,7 @@ test "DWARF expressions" {
         };
 
         inline for (expected) |e| {
-            try testing.expectEqual(@as(e[0], e[1]), @as(e[2], @bitCast(stack_machine.stack.popOrNull().?.generic)));
+            try testing.expectEqual(@as(e[0], e[1]), @as(e[2], @bitCast(stack_machine.stack.pop().?.generic)));
         }
     }
 
@@ -1199,14 +1199,14 @@ test "DWARF expressions" {
 
             _ = try stack_machine.run(program.items, allocator, context, 0);
 
-            const regval_type = stack_machine.stack.popOrNull().?.regval_type;
+            const regval_type = stack_machine.stack.pop().?.regval_type;
             try testing.expectEqual(@as(usize, 400), regval_type.type_offset);
             try testing.expectEqual(@as(u8, @sizeOf(usize)), regval_type.type_size);
             try testing.expectEqual(@as(usize, 0xee), regval_type.value);
 
-            try testing.expectEqual(@as(usize, 303), stack_machine.stack.popOrNull().?.generic);
-            try testing.expectEqual(@as(usize, 202), stack_machine.stack.popOrNull().?.generic);
-            try testing.expectEqual(@as(usize, 101), stack_machine.stack.popOrNull().?.generic);
+            try testing.expectEqual(@as(usize, 303), stack_machine.stack.pop().?.generic);
+            try testing.expectEqual(@as(usize, 202), stack_machine.stack.pop().?.generic);
+            try testing.expectEqual(@as(usize, 101), stack_machine.stack.pop().?.generic);
         } else |err| {
             switch (err) {
                 error.UnimplementedArch,
@@ -1227,15 +1227,15 @@ test "DWARF expressions" {
         try b.writeConst(writer, u8, 1);
         try b.writeOpcode(writer, OP.dup);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 1), stack_machine.stack.popOrNull().?.generic);
-        try testing.expectEqual(@as(usize, 1), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 1), stack_machine.stack.pop().?.generic);
+        try testing.expectEqual(@as(usize, 1), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
         try b.writeConst(writer, u8, 1);
         try b.writeOpcode(writer, OP.drop);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expect(stack_machine.stack.popOrNull() == null);
+        try testing.expect(stack_machine.stack.pop() == null);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1244,7 +1244,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u8, 6);
         try b.writePick(writer, 2);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 4), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 4), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1253,7 +1253,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u8, 6);
         try b.writeOpcode(writer, OP.over);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 5), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 5), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1261,8 +1261,8 @@ test "DWARF expressions" {
         try b.writeConst(writer, u8, 6);
         try b.writeOpcode(writer, OP.swap);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 5), stack_machine.stack.popOrNull().?.generic);
-        try testing.expectEqual(@as(usize, 6), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 5), stack_machine.stack.pop().?.generic);
+        try testing.expectEqual(@as(usize, 6), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1271,9 +1271,9 @@ test "DWARF expressions" {
         try b.writeConst(writer, u8, 6);
         try b.writeOpcode(writer, OP.rot);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 5), stack_machine.stack.popOrNull().?.generic);
-        try testing.expectEqual(@as(usize, 4), stack_machine.stack.popOrNull().?.generic);
-        try testing.expectEqual(@as(usize, 6), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 5), stack_machine.stack.pop().?.generic);
+        try testing.expectEqual(@as(usize, 4), stack_machine.stack.pop().?.generic);
+        try testing.expectEqual(@as(usize, 6), stack_machine.stack.pop().?.generic);
 
         const deref_target: usize = @truncate(0xffeeffee_ffeeffee);
 
@@ -1282,7 +1282,7 @@ test "DWARF expressions" {
         try b.writeAddr(writer, @intFromPtr(&deref_target));
         try b.writeOpcode(writer, OP.deref);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(deref_target, stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(deref_target, stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1290,14 +1290,14 @@ test "DWARF expressions" {
         try b.writeAddr(writer, @intFromPtr(&deref_target));
         try b.writeOpcode(writer, OP.xderef);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(deref_target, stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(deref_target, stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
         try b.writeAddr(writer, @intFromPtr(&deref_target));
         try b.writeDerefSize(writer, 1);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, @as(*const u8, @ptrCast(&deref_target)).*), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, @as(*const u8, @ptrCast(&deref_target)).*), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1305,7 +1305,7 @@ test "DWARF expressions" {
         try b.writeAddr(writer, @intFromPtr(&deref_target));
         try b.writeXDerefSize(writer, 1);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, @as(*const u8, @ptrCast(&deref_target)).*), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, @as(*const u8, @ptrCast(&deref_target)).*), stack_machine.stack.pop().?.generic);
 
         const type_offset: usize = @truncate(0xaabbaabb_aabbaabb);
 
@@ -1314,7 +1314,7 @@ test "DWARF expressions" {
         try b.writeAddr(writer, @intFromPtr(&deref_target));
         try b.writeDerefType(writer, 1, type_offset);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        const deref_type = stack_machine.stack.popOrNull().?.regval_type;
+        const deref_type = stack_machine.stack.pop().?.regval_type;
         try testing.expectEqual(type_offset, deref_type.type_offset);
         try testing.expectEqual(@as(u8, 1), deref_type.type_size);
         try testing.expectEqual(@as(usize, @as(*const u8, @ptrCast(&deref_target)).*), deref_type.value);
@@ -1325,7 +1325,7 @@ test "DWARF expressions" {
         try b.writeAddr(writer, @intFromPtr(&deref_target));
         try b.writeXDerefType(writer, 1, type_offset);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        const xderef_type = stack_machine.stack.popOrNull().?.regval_type;
+        const xderef_type = stack_machine.stack.pop().?.regval_type;
         try testing.expectEqual(type_offset, xderef_type.type_offset);
         try testing.expectEqual(@as(u8, 1), xderef_type.type_size);
         try testing.expectEqual(@as(usize, @as(*const u8, @ptrCast(&deref_target)).*), xderef_type.value);
@@ -1336,7 +1336,7 @@ test "DWARF expressions" {
         program.clearRetainingCapacity();
         try b.writeOpcode(writer, OP.push_object_address);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, @intFromPtr(context.object_address.?)), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, @intFromPtr(context.object_address.?)), stack_machine.stack.pop().?.generic);
 
         // TODO: Test OP.form_tls_address
 
@@ -1346,7 +1346,7 @@ test "DWARF expressions" {
         program.clearRetainingCapacity();
         try b.writeOpcode(writer, OP.call_frame_cfa);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(context.cfa.?, stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(context.cfa.?, stack_machine.stack.pop().?.generic);
     }
 
     // Arithmetic and Logical Operations
@@ -1358,7 +1358,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, i16, -4096);
         try b.writeOpcode(writer, OP.abs);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 4096), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 4096), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1366,7 +1366,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 0xf0ff);
         try b.writeOpcode(writer, OP.@"and");
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 0xf00f), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 0xf00f), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1374,7 +1374,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, i16, 100);
         try b.writeOpcode(writer, OP.div);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(isize, -404 / 100), @as(isize, @bitCast(stack_machine.stack.popOrNull().?.generic)));
+        try testing.expectEqual(@as(isize, -404 / 100), @as(isize, @bitCast(stack_machine.stack.pop().?.generic)));
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1382,7 +1382,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 50);
         try b.writeOpcode(writer, OP.minus);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 150), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 150), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1390,7 +1390,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 100);
         try b.writeOpcode(writer, OP.mod);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 23), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 23), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1398,7 +1398,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 0xee);
         try b.writeOpcode(writer, OP.mul);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 0xed12), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 0xed12), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1407,15 +1407,15 @@ test "DWARF expressions" {
         try b.writeConst(writer, i16, -6);
         try b.writeOpcode(writer, OP.neg);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 6), stack_machine.stack.popOrNull().?.generic);
-        try testing.expectEqual(@as(isize, -5), @as(isize, @bitCast(stack_machine.stack.popOrNull().?.generic)));
+        try testing.expectEqual(@as(usize, 6), stack_machine.stack.pop().?.generic);
+        try testing.expectEqual(@as(isize, -5), @as(isize, @bitCast(stack_machine.stack.pop().?.generic)));
 
         stack_machine.reset();
         program.clearRetainingCapacity();
         try b.writeConst(writer, u16, 0xff0f);
         try b.writeOpcode(writer, OP.not);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(~@as(usize, 0xff0f), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(~@as(usize, 0xff0f), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1423,7 +1423,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 0xf0ff);
         try b.writeOpcode(writer, OP.@"or");
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 0xffff), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 0xffff), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1431,14 +1431,14 @@ test "DWARF expressions" {
         try b.writeConst(writer, i16, 100);
         try b.writeOpcode(writer, OP.plus);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 502), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 502), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
         try b.writeConst(writer, u16, 4096);
         try b.writePlusUconst(writer, @as(usize, 8192));
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 4096 + 8192), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 4096 + 8192), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1446,7 +1446,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 1);
         try b.writeOpcode(writer, OP.shl);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 0xfff << 1), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 0xfff << 1), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1454,7 +1454,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 1);
         try b.writeOpcode(writer, OP.shr);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 0xfff >> 1), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 0xfff >> 1), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1462,7 +1462,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 1);
         try b.writeOpcode(writer, OP.shr);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, @bitCast(@as(isize, 0xfff) >> 1)), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, @bitCast(@as(isize, 0xfff) >> 1)), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1470,7 +1470,7 @@ test "DWARF expressions" {
         try b.writeConst(writer, u16, 0xff0f);
         try b.writeOpcode(writer, OP.xor);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 0x0ff0), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 0x0ff0), stack_machine.stack.pop().?.generic);
     }
 
     // Control Flow Operations
@@ -1499,9 +1499,9 @@ test "DWARF expressions" {
             try b.writeConst(writer, u16, 0);
             try b.writeOpcode(writer, e[0]);
             _ = try stack_machine.run(program.items, allocator, context, null);
-            try testing.expectEqual(@as(usize, e[3]), stack_machine.stack.popOrNull().?.generic);
-            try testing.expectEqual(@as(usize, e[2]), stack_machine.stack.popOrNull().?.generic);
-            try testing.expectEqual(@as(usize, e[1]), stack_machine.stack.popOrNull().?.generic);
+            try testing.expectEqual(@as(usize, e[3]), stack_machine.stack.pop().?.generic);
+            try testing.expectEqual(@as(usize, e[2]), stack_machine.stack.pop().?.generic);
+            try testing.expectEqual(@as(usize, e[1]), stack_machine.stack.pop().?.generic);
         }
 
         stack_machine.reset();
@@ -1510,7 +1510,7 @@ test "DWARF expressions" {
         try b.writeSkip(writer, 1);
         try b.writeLiteral(writer, 3);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 2), stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(@as(usize, 2), stack_machine.stack.pop().?.generic);
 
         stack_machine.reset();
         program.clearRetainingCapacity();
@@ -1522,9 +1522,9 @@ test "DWARF expressions" {
         try b.writeLiteral(writer, 4);
         try b.writeLiteral(writer, 5);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(@as(usize, 5), stack_machine.stack.popOrNull().?.generic);
-        try testing.expectEqual(@as(usize, 4), stack_machine.stack.popOrNull().?.generic);
-        try testing.expect(stack_machine.stack.popOrNull() == null);
+        try testing.expectEqual(@as(usize, 5), stack_machine.stack.pop().?.generic);
+        try testing.expectEqual(@as(usize, 4), stack_machine.stack.pop().?.generic);
+        try testing.expect(stack_machine.stack.pop() == null);
 
         // TODO: Test call2, call4, call_ref once implemented
 
@@ -1548,7 +1548,7 @@ test "DWARF expressions" {
         try b.writeConstType(writer, @as(usize, 0), &value_bytes);
         try b.writeConvert(writer, @as(usize, 0));
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(value, stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(value, stack_machine.stack.pop().?.generic);
 
         // Reinterpret to generic type
         stack_machine.reset();
@@ -1556,7 +1556,7 @@ test "DWARF expressions" {
         try b.writeConstType(writer, @as(usize, 0), &value_bytes);
         try b.writeReinterpret(writer, @as(usize, 0));
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expectEqual(value, stack_machine.stack.popOrNull().?.generic);
+        try testing.expectEqual(value, stack_machine.stack.pop().?.generic);
 
         // Reinterpret to new type
         const die_offset: usize = 0xffee;
@@ -1566,7 +1566,7 @@ test "DWARF expressions" {
         try b.writeConstType(writer, @as(usize, 0), &value_bytes);
         try b.writeReinterpret(writer, die_offset);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        const const_type = stack_machine.stack.popOrNull().?.const_type;
+        const const_type = stack_machine.stack.pop().?.const_type;
         try testing.expectEqual(die_offset, const_type.type_offset);
 
         stack_machine.reset();
@@ -1574,7 +1574,7 @@ test "DWARF expressions" {
         try b.writeLiteral(writer, 0);
         try b.writeReinterpret(writer, die_offset);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        const regval_type = stack_machine.stack.popOrNull().?.regval_type;
+        const regval_type = stack_machine.stack.pop().?.regval_type;
         try testing.expectEqual(die_offset, regval_type.type_offset);
     }
 
@@ -1586,7 +1586,7 @@ test "DWARF expressions" {
         program.clearRetainingCapacity();
         try b.writeOpcode(writer, OP.nop);
         _ = try stack_machine.run(program.items, allocator, context, null);
-        try testing.expect(stack_machine.stack.popOrNull() == null);
+        try testing.expect(stack_machine.stack.pop() == null);
 
         // Sub-expression
         {
@@ -1599,7 +1599,7 @@ test "DWARF expressions" {
             program.clearRetainingCapacity();
             try b.writeEntryValue(writer, sub_program.items);
             _ = try stack_machine.run(program.items, allocator, context, null);
-            try testing.expectEqual(@as(usize, 3), stack_machine.stack.popOrNull().?.generic);
+            try testing.expectEqual(@as(usize, 3), stack_machine.stack.pop().?.generic);
         }
 
         // Register location description
@@ -1626,7 +1626,7 @@ test "DWARF expressions" {
             program.clearRetainingCapacity();
             try b.writeEntryValue(writer, sub_program.items);
             _ = try stack_machine.run(program.items, allocator, context, null);
-            try testing.expectEqual(@as(usize, 0xee), stack_machine.stack.popOrNull().?.generic);
+            try testing.expectEqual(@as(usize, 0xee), stack_machine.stack.pop().?.generic);
         } else |err| {
             switch (err) {
                 error.UnimplementedArch,
lib/std/debug/SelfInfo.zig
@@ -2138,7 +2138,7 @@ pub const VirtualMachine = struct {
                 self.current_row.copy_on_write = true;
             },
             .restore_state => {
-                const restored_columns = self.stack.popOrNull() orelse return error.InvalidOperation;
+                const restored_columns = self.stack.pop() orelse return error.InvalidOperation;
                 self.columns.shrinkRetainingCapacity(self.columns.items.len - self.current_row.columns.len);
                 try self.columns.ensureUnusedCapacity(allocator, restored_columns.len);
 
lib/std/fs/Dir.zig
@@ -682,7 +682,7 @@ pub const Walker = struct {
                 // walking if they want, which means that we need to pop the directory
                 // that errored from the stack. Otherwise, all future `next` calls would
                 // likely just fail with the same error.
-                var item = self.stack.pop();
+                var item = self.stack.pop().?;
                 if (self.stack.items.len != 0) {
                     item.iter.dir.close();
                 }
@@ -718,7 +718,7 @@ pub const Walker = struct {
                     .kind = base.kind,
                 };
             } else {
-                var item = self.stack.pop();
+                var item = self.stack.pop().?;
                 if (self.stack.items.len != 0) {
                     item.iter.dir.close();
                 }
lib/std/heap/debug_allocator.zig
@@ -1070,7 +1070,7 @@ test "small allocations - free in reverse order" {
         try list.append(ptr);
     }
 
-    while (list.popOrNull()) |ptr| {
+    while (list.pop()) |ptr| {
         allocator.destroy(ptr);
     }
 }
@@ -1227,7 +1227,7 @@ test "shrink large object to large object with larger alignment" {
         try stuff_to_free.append(slice);
         slice = try allocator.alignedAlloc(u8, 16, alloc_size);
     }
-    while (stuff_to_free.popOrNull()) |item| {
+    while (stuff_to_free.pop()) |item| {
         allocator.free(item);
     }
     slice[0] = 0x12;
@@ -1299,7 +1299,7 @@ test "realloc large object to larger alignment" {
         try stuff_to_free.append(slice);
         slice = try allocator.alignedAlloc(u8, 16, default_page_size * 2 + 50);
     }
-    while (stuff_to_free.popOrNull()) |item| {
+    while (stuff_to_free.pop()) |item| {
         allocator.free(item);
     }
     slice[0] = 0x12;
lib/std/json/dynamic.zig
@@ -124,7 +124,7 @@ pub const Value = union(enum) {
                 .array_begin => {
                     try stack.append(Value{ .array = Array.init(allocator) });
                 },
-                .array_end => return try handleCompleteValue(&stack, allocator, source, stack.pop(), options) orelse continue,
+                .array_end => return try handleCompleteValue(&stack, allocator, source, stack.pop().?, options) orelse continue,
 
                 else => unreachable,
             }
@@ -171,7 +171,7 @@ fn handleCompleteValue(stack: *Array, allocator: Allocator, source: anytype, val
                 switch (try source.nextAllocMax(allocator, .alloc_always, options.max_value_len.?)) {
                     .object_end => {
                         // This object is complete.
-                        value = stack.pop();
+                        value = stack.pop().?;
                         // Effectively recurse now that we have a complete value.
                         if (stack.items.len == 0) return value;
                         continue;
lib/std/array_list.zig
@@ -289,10 +289,10 @@ pub fn ArrayListAligned(comptime T: type, comptime alignment: ?u29) type {
         /// Asserts that the list is not empty.
         /// Asserts that the index is in bounds.
         pub fn swapRemove(self: *Self, i: usize) T {
-            if (self.items.len - 1 == i) return self.pop();
+            if (self.items.len - 1 == i) return self.pop().?;
 
             const old_item = self.items[i];
-            self.items[i] = self.pop();
+            self.items[i] = self.pop().?;
             return old_item;
         }
 
@@ -555,23 +555,15 @@ pub fn ArrayListAligned(comptime T: type, comptime alignment: ?u29) type {
             return self.items[prev_len..][0..n];
         }
 
-        /// Remove and return the last element from the list.
-        /// Invalidates element pointers to the removed element.
-        /// Asserts that the list is not empty.
-        pub fn pop(self: *Self) T {
+        /// Remove and return the last element from the list, or return `null` if list is empty.
+        /// Invalidates element pointers to the removed element, if any.
+        pub fn pop(self: *Self) ?T {
+            if (self.items.len == 0) return null;
             const val = self.items[self.items.len - 1];
             self.items.len -= 1;
             return val;
         }
 
-        /// Remove and return the last element from the list, or
-        /// return `null` if list is empty.
-        /// Invalidates element pointers to the removed element, if any.
-        pub fn popOrNull(self: *Self) ?T {
-            if (self.items.len == 0) return null;
-            return self.pop();
-        }
-
         /// Returns a slice of all the items plus the extra capacity, whose memory
         /// contents are `undefined`.
         pub fn allocatedSlice(self: Self) Slice {
@@ -897,10 +889,10 @@ pub fn ArrayListAlignedUnmanaged(comptime T: type, comptime alignment: ?u29) typ
         /// Asserts that the list is not empty.
         /// Asserts that the index is in bounds.
         pub fn swapRemove(self: *Self, i: usize) T {
-            if (self.items.len - 1 == i) return self.pop();
+            if (self.items.len - 1 == i) return self.pop().?;
 
             const old_item = self.items[i];
-            self.items[i] = self.pop();
+            self.items[i] = self.pop().?;
             return old_item;
         }
 
@@ -1190,22 +1182,15 @@ pub fn ArrayListAlignedUnmanaged(comptime T: type, comptime alignment: ?u29) typ
         }
 
         /// Remove and return the last element from the list.
+        /// If the list is empty, returns `null`.
         /// Invalidates pointers to last element.
-        /// Asserts that the list is not empty.
-        pub fn pop(self: *Self) T {
+        pub fn pop(self: *Self) ?T {
+            if (self.items.len == 0) return null;
             const val = self.items[self.items.len - 1];
             self.items.len -= 1;
             return val;
         }
 
-        /// Remove and return the last element from the list.
-        /// If the list is empty, returns `null`.
-        /// Invalidates pointers to last element.
-        pub fn popOrNull(self: *Self) ?T {
-            if (self.items.len == 0) return null;
-            return self.pop();
-        }
-
         /// Returns a slice of all the items plus the extra capacity, whose memory
         /// contents are `undefined`.
         pub fn allocatedSlice(self: Self) Slice {
@@ -2184,7 +2169,7 @@ test "ArrayList(u0)" {
     try testing.expectEqual(count, 3);
 }
 
-test "ArrayList(?u32).popOrNull()" {
+test "ArrayList(?u32).pop()" {
     const a = testing.allocator;
 
     var list = ArrayList(?u32).init(a);
@@ -2195,10 +2180,10 @@ test "ArrayList(?u32).popOrNull()" {
     try list.append(2);
     try testing.expectEqual(list.items.len, 3);
 
-    try testing.expect(list.popOrNull().? == @as(u32, 2));
-    try testing.expect(list.popOrNull().? == @as(u32, 1));
-    try testing.expect(list.popOrNull().? == null);
-    try testing.expect(list.popOrNull() == null);
+    try testing.expect(list.pop().? == @as(u32, 2));
+    try testing.expect(list.pop().? == @as(u32, 1));
+    try testing.expect(list.pop().? == null);
+    try testing.expect(list.pop() == null);
 }
 
 test "ArrayList(u32).getLast()" {
lib/std/heap.zig
@@ -681,7 +681,7 @@ pub fn testAllocatorAlignedShrink(base_allocator: mem.Allocator) !void {
         try stuff_to_free.append(slice);
         slice = try allocator.alignedAlloc(u8, 16, alloc_size);
     }
-    while (stuff_to_free.popOrNull()) |item| {
+    while (stuff_to_free.pop()) |item| {
         allocator.free(item);
     }
     slice[0] = 0x12;
src/arch/aarch64/CodeGen.zig
@@ -572,7 +572,7 @@ fn gen(self: *Self) !void {
             // dbg_epilogue_begin) is the last exitlude jump
             // relocation (which would just jump one instruction
             // further), it can be safely removed
-            self.mir_instructions.orderedRemove(self.exitlude_jump_relocs.pop());
+            self.mir_instructions.orderedRemove(self.exitlude_jump_relocs.pop().?);
         }
 
         for (self.exitlude_jump_relocs.items) |jmp_reloc| {
@@ -4694,7 +4694,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) InnerError!void {
 
     try self.branch_stack.append(.{});
     errdefer {
-        _ = self.branch_stack.pop();
+        _ = self.branch_stack.pop().?;
     }
 
     try self.ensureProcessDeathCapacity(liveness_condbr.then_deaths.len);
@@ -4705,7 +4705,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) InnerError!void {
 
     // Revert to the previous register and stack allocation state.
 
-    var saved_then_branch = self.branch_stack.pop();
+    var saved_then_branch = self.branch_stack.pop().?;
     defer saved_then_branch.deinit(self.gpa);
 
     self.register_manager.registers = parent_registers;
@@ -4800,7 +4800,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) InnerError!void {
     }
 
     {
-        var item = self.branch_stack.pop();
+        var item = self.branch_stack.pop().?;
         item.deinit(self.gpa);
     }
 
@@ -5059,7 +5059,7 @@ fn lowerBlock(self: *Self, inst: Air.Inst.Index, body: []const Air.Inst.Index) !
         // If the last Mir instruction is the last relocation (which
         // would just jump one instruction further), it can be safely
         // removed
-        self.mir_instructions.orderedRemove(relocs.pop());
+        self.mir_instructions.orderedRemove(relocs.pop().?);
     }
     for (relocs.items) |reloc| {
         try self.performReloc(reloc);
@@ -5125,7 +5125,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) InnerError!void {
 
         try self.branch_stack.append(.{});
         errdefer {
-            _ = self.branch_stack.pop();
+            _ = self.branch_stack.pop().?;
         }
 
         try self.ensureProcessDeathCapacity(liveness.deaths[case.idx].len);
@@ -5135,7 +5135,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) InnerError!void {
         try self.genBody(case.body);
 
         // Revert to the previous register and stack allocation state.
-        var saved_case_branch = self.branch_stack.pop();
+        var saved_case_branch = self.branch_stack.pop().?;
         defer saved_case_branch.deinit(self.gpa);
 
         self.register_manager.registers = parent_registers;
@@ -5163,7 +5163,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) InnerError!void {
 
         try self.branch_stack.append(.{});
         errdefer {
-            _ = self.branch_stack.pop();
+            _ = self.branch_stack.pop().?;
         }
 
         const else_deaths = liveness.deaths.len - 1;
@@ -5174,7 +5174,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) InnerError!void {
         try self.genBody(else_body);
 
         // Revert to the previous register and stack allocation state.
-        var saved_case_branch = self.branch_stack.pop();
+        var saved_case_branch = self.branch_stack.pop().?;
         defer saved_case_branch.deinit(self.gpa);
 
         self.register_manager.registers = parent_registers;
src/arch/arm/CodeGen.zig
@@ -568,7 +568,7 @@ fn gen(self: *Self) !void {
             // dbg_epilogue_begin) is the last exitlude jump
             // relocation (which would just jump one instruction
             // further), it can be safely removed
-            self.mir_instructions.orderedRemove(self.exitlude_jump_relocs.pop());
+            self.mir_instructions.orderedRemove(self.exitlude_jump_relocs.pop().?);
         }
 
         for (self.exitlude_jump_relocs.items) |jmp_reloc| {
@@ -4669,7 +4669,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
 
     try self.branch_stack.append(.{});
     errdefer {
-        _ = self.branch_stack.pop();
+        _ = self.branch_stack.pop().?;
     }
 
     try self.ensureProcessDeathCapacity(liveness_condbr.then_deaths.len);
@@ -4680,7 +4680,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
 
     // Revert to the previous register and stack allocation state.
 
-    var saved_then_branch = self.branch_stack.pop();
+    var saved_then_branch = self.branch_stack.pop().?;
     defer saved_then_branch.deinit(self.gpa);
 
     self.register_manager.registers = parent_registers;
@@ -4775,7 +4775,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
     }
 
     {
-        var item = self.branch_stack.pop();
+        var item = self.branch_stack.pop().?;
         item.deinit(self.gpa);
     }
 
@@ -5009,7 +5009,7 @@ fn lowerBlock(self: *Self, inst: Air.Inst.Index, body: []const Air.Inst.Index) !
         // If the last Mir instruction is the last relocation (which
         // would just jump one instruction further), it can be safely
         // removed
-        self.mir_instructions.orderedRemove(relocs.pop());
+        self.mir_instructions.orderedRemove(relocs.pop().?);
     }
     for (relocs.items) |reloc| {
         try self.performReloc(reloc);
@@ -5074,7 +5074,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) !void {
 
         try self.branch_stack.append(.{});
         errdefer {
-            _ = self.branch_stack.pop();
+            _ = self.branch_stack.pop().?;
         }
 
         try self.ensureProcessDeathCapacity(liveness.deaths[case.idx].len);
@@ -5084,7 +5084,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) !void {
         try self.genBody(case.body);
 
         // Revert to the previous register and stack allocation state.
-        var saved_case_branch = self.branch_stack.pop();
+        var saved_case_branch = self.branch_stack.pop().?;
         defer saved_case_branch.deinit(self.gpa);
 
         self.register_manager.registers = parent_registers;
@@ -5112,7 +5112,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) !void {
 
         try self.branch_stack.append(.{});
         errdefer {
-            _ = self.branch_stack.pop();
+            _ = self.branch_stack.pop().?;
         }
 
         const else_deaths = liveness.deaths.len - 1;
@@ -5123,7 +5123,7 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) !void {
         try self.genBody(else_body);
 
         // Revert to the previous register and stack allocation state.
-        var saved_case_branch = self.branch_stack.pop();
+        var saved_case_branch = self.branch_stack.pop().?;
         defer saved_case_branch.deinit(self.gpa);
 
         self.register_manager.registers = parent_registers;
src/arch/sparc64/CodeGen.zig
@@ -392,7 +392,7 @@ fn gen(self: *Self) !void {
             // dbg_epilogue_begin) is the last exitlude jump
             // relocation (which would just jump two instructions
             // further), it can be safely removed
-            const index = self.exitlude_jump_relocs.pop();
+            const index = self.exitlude_jump_relocs.pop().?;
 
             // First, remove the delay slot, then remove
             // the branch instruction itself.
@@ -1147,7 +1147,7 @@ fn lowerBlock(self: *Self, inst: Air.Inst.Index, body: []const Air.Inst.Index) !
         // If the last Mir instruction is the last relocation (which
         // would just jump two instruction further), it can be safely
         // removed
-        const index = relocs.pop();
+        const index = relocs.pop().?;
 
         // First, remove the delay slot, then remove
         // the branch instruction itself.
@@ -1501,7 +1501,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
 
     try self.branch_stack.append(.{});
     errdefer {
-        _ = self.branch_stack.pop();
+        _ = self.branch_stack.pop().?;
     }
 
     try self.ensureProcessDeathCapacity(liveness_condbr.then_deaths.len);
@@ -1512,7 +1512,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
 
     // Revert to the previous register and stack allocation state.
 
-    var saved_then_branch = self.branch_stack.pop();
+    var saved_then_branch = self.branch_stack.pop().?;
     defer saved_then_branch.deinit(self.gpa);
 
     self.register_manager.registers = parent_registers;
@@ -1608,7 +1608,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
     }
 
     {
-        var item = self.branch_stack.pop();
+        var item = self.branch_stack.pop().?;
         item.deinit(self.gpa);
     }
 
src/arch/wasm/CodeGen.zig
@@ -1121,11 +1121,11 @@ fn allocLocal(cg: *CodeGen, ty: Type) InnerError!WValue {
     const zcu = cg.pt.zcu;
     const valtype = typeToValtype(ty, zcu, cg.target);
     const index_or_null = switch (valtype) {
-        .i32 => cg.free_locals_i32.popOrNull(),
-        .i64 => cg.free_locals_i64.popOrNull(),
-        .f32 => cg.free_locals_f32.popOrNull(),
-        .f64 => cg.free_locals_f64.popOrNull(),
-        .v128 => cg.free_locals_v128.popOrNull(),
+        .i32 => cg.free_locals_i32.pop(),
+        .i64 => cg.free_locals_i64.pop(),
+        .f32 => cg.free_locals_f32.pop(),
+        .f64 => cg.free_locals_f64.pop(),
+        .v128 => cg.free_locals_v128.pop(),
     };
     if (index_or_null) |index| {
         log.debug("reusing local ({d}) of type {}", .{ index, valtype });
@@ -1309,7 +1309,7 @@ fn functionInner(cg: *CodeGen, any_returns: bool) InnerError!Function {
     try cg.branches.append(cg.gpa, .{});
     // clean up outer branch
     defer {
-        var outer_branch = cg.branches.pop();
+        var outer_branch = cg.branches.pop().?;
         outer_branch.deinit(cg.gpa);
         assert(cg.branches.items.len == 0); // missing branch merge
     }
@@ -3482,7 +3482,7 @@ fn airCondBr(cg: *CodeGen, inst: Air.Inst.Index) InnerError!void {
         cg.branches.appendAssumeCapacity(.{});
         try cg.currentBranch().values.ensureUnusedCapacity(cg.gpa, @as(u32, @intCast(liveness_condbr.else_deaths.len)));
         defer {
-            var else_stack = cg.branches.pop();
+            var else_stack = cg.branches.pop().?;
             else_stack.deinit(cg.gpa);
         }
         try cg.genBody(else_body);
@@ -3494,7 +3494,7 @@ fn airCondBr(cg: *CodeGen, inst: Air.Inst.Index) InnerError!void {
         cg.branches.appendAssumeCapacity(.{});
         try cg.currentBranch().values.ensureUnusedCapacity(cg.gpa, @as(u32, @intCast(liveness_condbr.then_deaths.len)));
         defer {
-            var then_stack = cg.branches.pop();
+            var then_stack = cg.branches.pop().?;
             then_stack.deinit(cg.gpa);
         }
         try cg.genBody(then_body);
@@ -4132,7 +4132,7 @@ fn airSwitchBr(cg: *CodeGen, inst: Air.Inst.Index) InnerError!void {
         cg.branches.appendAssumeCapacity(.{});
         try cg.currentBranch().values.ensureUnusedCapacity(cg.gpa, liveness.deaths[index].len);
         defer {
-            var case_branch = cg.branches.pop();
+            var case_branch = cg.branches.pop().?;
             case_branch.deinit(cg.gpa);
         }
         try cg.genBody(case.body);
@@ -4144,7 +4144,7 @@ fn airSwitchBr(cg: *CodeGen, inst: Air.Inst.Index) InnerError!void {
         const else_deaths = liveness.deaths.len - 1;
         try cg.currentBranch().values.ensureUnusedCapacity(cg.gpa, liveness.deaths[else_deaths].len);
         defer {
-            var else_branch = cg.branches.pop();
+            var else_branch = cg.branches.pop().?;
             else_branch.deinit(cg.gpa);
         }
         try cg.genBody(else_body);
@@ -6459,7 +6459,7 @@ fn lowerTry(
         try cg.branches.append(cg.gpa, .{});
         try cg.currentBranch().values.ensureUnusedCapacity(cg.gpa, liveness.else_deaths.len + liveness.then_deaths.len);
         defer {
-            var branch = cg.branches.pop();
+            var branch = cg.branches.pop().?;
             branch.deinit(cg.gpa);
         }
         try cg.genBody(body);
src/link/Coff.zig
@@ -707,7 +707,7 @@ pub fn allocateSymbol(coff: *Coff) !u32 {
     try coff.locals.ensureUnusedCapacity(gpa, 1);
 
     const index = blk: {
-        if (coff.locals_free_list.popOrNull()) |index| {
+        if (coff.locals_free_list.pop()) |index| {
             log.debug("  (reusing symbol index {d})", .{index});
             break :blk index;
         } else {
@@ -735,7 +735,7 @@ fn allocateGlobal(coff: *Coff) !u32 {
     try coff.globals.ensureUnusedCapacity(gpa, 1);
 
     const index = blk: {
-        if (coff.globals_free_list.popOrNull()) |index| {
+        if (coff.globals_free_list.pop()) |index| {
             log.debug("  (reusing global index {d})", .{index});
             break :blk index;
         } else {
@@ -861,7 +861,7 @@ fn writeAtom(coff: *Coff, atom_index: Atom.Index, code: []u8) !void {
     try coff.pwriteAll(code, file_offset);
 
     // Now we can mark the relocs as resolved.
-    while (relocs.popOrNull()) |reloc| {
+    while (relocs.pop()) |reloc| {
         reloc.dirty = false;
     }
 }
@@ -3670,7 +3670,7 @@ const ImportTable = struct {
     fn addImport(itab: *ImportTable, allocator: Allocator, target: SymbolWithLoc) !ImportIndex {
         try itab.entries.ensureUnusedCapacity(allocator, 1);
         const index: u32 = blk: {
-            if (itab.free_list.popOrNull()) |index| {
+            if (itab.free_list.pop()) |index| {
                 log.debug("  (reusing import entry index {d})", .{index});
                 break :blk index;
             } else {
src/link/Dwarf.zig
@@ -363,7 +363,7 @@ pub const Section = struct {
     fn popUnit(sec: *Section, gpa: std.mem.Allocator) void {
         const unit_index: Unit.Index = @enumFromInt(sec.units.items.len - 1);
         sec.unlinkUnit(unit_index);
-        var unit = sec.units.pop();
+        var unit = sec.units.pop().?;
         unit.deinit(gpa);
     }
 
@@ -1559,7 +1559,7 @@ pub const WipNav = struct {
 
     pub fn leaveBlock(wip_nav: *WipNav, code_off: u64) UpdateError!void {
         const block_bytes = comptime uleb128Bytes(@intFromEnum(AbbrevCode.block));
-        const block = wip_nav.blocks.pop();
+        const block = wip_nav.blocks.pop().?;
         if (wip_nav.any_children)
             try uleb128(wip_nav.debug_info.writer(wip_nav.dwarf.gpa), @intFromEnum(AbbrevCode.null))
         else
@@ -1599,7 +1599,7 @@ pub const WipNav = struct {
 
     pub fn leaveInlineFunc(wip_nav: *WipNav, func: InternPool.Index, code_off: u64) UpdateError!void {
         const inlined_func_bytes = comptime uleb128Bytes(@intFromEnum(AbbrevCode.inlined_func));
-        const block = wip_nav.blocks.pop();
+        const block = wip_nav.blocks.pop().?;
         if (wip_nav.any_children)
             try uleb128(wip_nav.debug_info.writer(wip_nav.dwarf.gpa), @intFromEnum(AbbrevCode.null))
         else
@@ -2054,7 +2054,7 @@ pub const WipNav = struct {
 
     fn updateLazy(wip_nav: *WipNav, src_loc: Zcu.LazySrcLoc) UpdateError!void {
         const ip = &wip_nav.pt.zcu.intern_pool;
-        while (wip_nav.pending_lazy.popOrNull()) |val| switch (ip.typeOf(val)) {
+        while (wip_nav.pending_lazy.pop()) |val| switch (ip.typeOf(val)) {
             .type_type => try wip_nav.dwarf.updateLazyType(wip_nav.pt, src_loc, val, &wip_nav.pending_lazy),
             else => try wip_nav.dwarf.updateLazyValue(wip_nav.pt, src_loc, val, &wip_nav.pending_lazy),
         };
src/link/Plan9.zig
@@ -515,7 +515,7 @@ fn updateFinish(self: *Plan9, pt: Zcu.PerThread, nav_index: InternPool.Nav.Index
 
 fn allocateSymbolIndex(self: *Plan9) !usize {
     const gpa = self.base.comp.gpa;
-    if (self.syms_index_free_list.popOrNull()) |i| {
+    if (self.syms_index_free_list.pop()) |i| {
         return i;
     } else {
         _ = try self.syms.addOne(gpa);
@@ -524,7 +524,7 @@ fn allocateSymbolIndex(self: *Plan9) !usize {
 }
 
 fn allocateGotIndex(self: *Plan9) usize {
-    if (self.got_index_free_list.popOrNull()) |i| {
+    if (self.got_index_free_list.pop()) |i| {
         return i;
     } else {
         self.got_len += 1;
src/link/table_section.zig
@@ -13,7 +13,7 @@ pub fn TableSection(comptime Entry: type) type {
         pub fn allocateEntry(self: *Self, allocator: Allocator, entry: Entry) Allocator.Error!Index {
             try self.entries.ensureUnusedCapacity(allocator, 1);
             const index = blk: {
-                if (self.free_list.popOrNull()) |index| {
+                if (self.free_list.pop()) |index| {
                     log.debug("  (reusing entry index {d})", .{index});
                     break :blk index;
                 } else {
src/Package/Fetch.zig
@@ -127,7 +127,7 @@ pub const JobQueue = struct {
         // `Fetch` instances are allocated in prior ones' arenas.
         // Sorry, I know it's a bit weird, but it slightly simplifies the
         // critical section.
-        while (jq.all_fetches.popOrNull()) |f| f.deinit();
+        while (jq.all_fetches.pop()) |f| f.deinit();
         jq.all_fetches.deinit(gpa);
         jq.* = undefined;
     }
src/Compilation.zig
@@ -657,7 +657,7 @@ pub const CObject = struct {
                     .end_block => |block| switch (@as(BlockId, @enumFromInt(block.id))) {
                         .Meta => {},
                         .Diag => {
-                            var wip_diag = stack.pop();
+                            var wip_diag = stack.pop().?;
                             errdefer wip_diag.deinit(gpa);
 
                             const src_ranges = try wip_diag.src_ranges.toOwnedSlice(gpa);
@@ -5915,7 +5915,7 @@ pub fn addCCArgs(
                     try san_arg.appendSlice(arena, "fuzzer-no-link,");
                 }
                 // Chop off the trailing comma and append to argv.
-                if (san_arg.popOrNull()) |_| {
+                if (san_arg.pop()) |_| {
                     try argv.append(san_arg.items);
 
                     // These args have to be added after the `-fsanitize` arg or
src/InternPool.zig
@@ -929,7 +929,7 @@ pub fn addDependency(ip: *InternPool, gpa: Allocator, depender: AnalUnit, depend
             }
 
             // Prepend a new dependency.
-            const new_index: DepEntry.Index, const ptr = if (ip.free_dep_entries.popOrNull()) |new_index| new: {
+            const new_index: DepEntry.Index, const ptr = if (ip.free_dep_entries.pop()) |new_index| new: {
                 break :new .{ new_index, &ip.dep_entries.items[@intFromEnum(new_index)] };
             } else .{ @enumFromInt(ip.dep_entries.items.len), ip.dep_entries.addOneAssumeCapacity() };
             if (deps.unwrap()) |old_first| {
@@ -960,7 +960,7 @@ pub fn addDependency(ip: *InternPool, gpa: Allocator, depender: AnalUnit, depend
             }
 
             // Prepend a new dependency.
-            const new_index: DepEntry.Index, const ptr = if (ip.free_dep_entries.popOrNull()) |new_index| new: {
+            const new_index: DepEntry.Index, const ptr = if (ip.free_dep_entries.pop()) |new_index| new: {
                 break :new .{ new_index, &ip.dep_entries.items[@intFromEnum(new_index)] };
             } else .{ @enumFromInt(ip.dep_entries.items.len), ip.dep_entries.addOneAssumeCapacity() };
             if (gop.found_existing) {
src/link.zig
@@ -1888,7 +1888,7 @@ pub fn resolveInputs(
     // that this library search logic can be applied to them.
     mem.reverse(UnresolvedInput, unresolved_inputs.items);
 
-    syslib: while (unresolved_inputs.popOrNull()) |unresolved_input| {
+    syslib: while (unresolved_inputs.pop()) |unresolved_input| {
         const name_query: UnresolvedInput.NameQuery = switch (unresolved_input) {
             .name_query => |nq| nq,
             .ambiguous_name => |an| an: {
src/Sema.zig
@@ -3912,7 +3912,7 @@ fn resolveComptimeKnownAllocPtr(sema: *Sema, block: *Block, alloc: Air.Inst.Ref,
 
     const tmp_air = sema.getTmpAir();
 
-    while (to_map.popOrNull()) |air_ptr| {
+    while (to_map.pop()) |air_ptr| {
         if (ptr_mapping.contains(air_ptr)) continue;
         const PointerMethod = union(enum) {
             same_addr,
@@ -38422,7 +38422,7 @@ pub fn flushExports(sema: *Sema) !void {
     // `sema.exports` is completed; store the data into the `Zcu`.
     if (sema.exports.items.len == 1) {
         try zcu.single_exports.ensureUnusedCapacity(gpa, 1);
-        const export_idx: Zcu.Export.Index = zcu.free_exports.popOrNull() orelse idx: {
+        const export_idx: Zcu.Export.Index = zcu.free_exports.pop() orelse idx: {
             _ = try zcu.all_exports.addOne(gpa);
             break :idx @enumFromInt(zcu.all_exports.items.len - 1);
         };
src/Zcu.zig
@@ -3130,7 +3130,7 @@ pub fn mapOldZirToNew(
         }
     }
 
-    while (match_stack.popOrNull()) |match_item| {
+    while (match_stack.pop()) |match_item| {
         // First, a check: if the number of captures of this type has changed, we can't map it, because
         // we wouldn't know how to correlate type information with the last update.
         // Synchronizes with logic in `Zcu.PerThread.recreateStructType` etc.
@@ -3412,7 +3412,7 @@ pub fn addUnitReference(zcu: *Zcu, src_unit: AnalUnit, referenced_unit: AnalUnit
 
     try zcu.reference_table.ensureUnusedCapacity(gpa, 1);
 
-    const ref_idx = zcu.free_references.popOrNull() orelse idx: {
+    const ref_idx = zcu.free_references.pop() orelse idx: {
         _ = try zcu.all_references.addOne(gpa);
         break :idx zcu.all_references.items.len - 1;
     };
@@ -3437,7 +3437,7 @@ pub fn addTypeReference(zcu: *Zcu, src_unit: AnalUnit, referenced_type: InternPo
 
     try zcu.type_reference_table.ensureUnusedCapacity(gpa, 1);
 
-    const ref_idx = zcu.free_type_references.popOrNull() orelse idx: {
+    const ref_idx = zcu.free_type_references.pop() orelse idx: {
         _ = try zcu.all_type_references.addOne(gpa);
         break :idx zcu.all_type_references.items.len - 1;
     };
tools/process_headers.zig
@@ -192,7 +192,7 @@ pub fn main() !void {
             var dir_stack = std.ArrayList([]const u8).init(allocator);
             try dir_stack.append(target_include_dir);
 
-            while (dir_stack.popOrNull()) |full_dir_name| {
+            while (dir_stack.pop()) |full_dir_name| {
                 var dir = std.fs.cwd().openDir(full_dir_name, .{ .iterate = true }) catch |err| switch (err) {
                     error.FileNotFound => continue :search,
                     error.AccessDenied => continue :search,
@@ -273,14 +273,14 @@ pub fn main() !void {
             }
         }
         std.mem.sort(*Contents, contents_list.items, {}, Contents.hitCountLessThan);
-        const best_contents = contents_list.popOrNull().?;
+        const best_contents = contents_list.pop().?;
         if (best_contents.hit_count > 1) {
             // worth it to make it generic
             const full_path = try std.fs.path.join(allocator, &[_][]const u8{ out_dir, generic_name, path_kv.key_ptr.* });
             try std.fs.cwd().makePath(std.fs.path.dirname(full_path).?);
             try std.fs.cwd().writeFile(.{ .sub_path = full_path, .data = best_contents.bytes });
             best_contents.is_generic = true;
-            while (contents_list.popOrNull()) |contender| {
+            while (contents_list.pop()) |contender| {
                 if (contender.hit_count > 1) {
                     const this_missed_bytes = contender.hit_count * contender.bytes.len;
                     missed_opportunity_bytes += this_missed_bytes;
tools/update-linux-headers.zig
@@ -189,7 +189,7 @@ pub fn main() !void {
             var dir_stack = std.ArrayList([]const u8).init(arena);
             try dir_stack.append(target_include_dir);
 
-            while (dir_stack.popOrNull()) |full_dir_name| {
+            while (dir_stack.pop()) |full_dir_name| {
                 var dir = std.fs.cwd().openDir(full_dir_name, .{ .iterate = true }) catch |err| switch (err) {
                     error.FileNotFound => continue :search,
                     error.AccessDenied => continue :search,
@@ -270,14 +270,14 @@ pub fn main() !void {
             }
         }
         std.mem.sort(*Contents, contents_list.items, {}, Contents.hitCountLessThan);
-        const best_contents = contents_list.popOrNull().?;
+        const best_contents = contents_list.pop().?;
         if (best_contents.hit_count > 1) {
             // worth it to make it generic
             const full_path = try std.fs.path.join(arena, &[_][]const u8{ out_dir, generic_name, path_kv.key_ptr.* });
             try std.fs.cwd().makePath(std.fs.path.dirname(full_path).?);
             try std.fs.cwd().writeFile(.{ .sub_path = full_path, .data = best_contents.bytes });
             best_contents.is_generic = true;
-            while (contents_list.popOrNull()) |contender| {
+            while (contents_list.pop()) |contender| {
                 if (contender.hit_count > 1) {
                     const this_missed_bytes = contender.hit_count * contender.bytes.len;
                     missed_opportunity_bytes += this_missed_bytes;