Commit d78532f462

@@ -20499,6 +20499,14 @@ fn tupleFieldPtr(
         .@"addrspace" = tuple_ptr_ty.ptrAddressSpace(),
     });
 
+    if (tuple_ty.structFieldValueComptime(field_index)) |default_val| {
+        const val = try Value.Tag.comptime_field_ptr.create(sema.arena, .{
+            .field_ty = field_ty,
+            .field_val = default_val,
+        });
+        return sema.addConstant(ptr_field_ty, val);
+    }
+
     if (try sema.resolveMaybeUndefVal(block, tuple_ptr_src, tuple_ptr)) |tuple_ptr_val| {
         return sema.addConstant(
             ptr_field_ty,
@@ -20510,14 +20518,6 @@ fn tupleFieldPtr(
         );
     }
 
-    if (tuple_ty.structFieldValueComptime(field_index)) |default_val| {
-        const val = try Value.Tag.comptime_field_ptr.create(sema.arena, .{
-            .field_ty = field_ty,
-            .field_val = default_val,
-        });
-        return sema.addConstant(ptr_field_ty, val);
-    }
-
     if (!init) {
         try sema.validateRuntimeElemAccess(block, field_index_src, field_ty, tuple_ty, tuple_ptr_src);
     }
@@ -23241,6 +23241,16 @@ fn beginComptimePtrLoad(
             break :blk deref;
         },
 
+        .comptime_field_ptr => blk: {
+            const comptime_field_ptr = ptr_val.castTag(.comptime_field_ptr).?.data;
+            break :blk ComptimePtrLoadKit{
+                .parent = null,
+                .pointee = .{ .ty = comptime_field_ptr.field_ty, .val = comptime_field_ptr.field_val },
+                .is_mutable = false,
+                .ty_without_well_defined_layout = comptime_field_ptr.field_ty,
+            };
+        },
+
         .opt_payload_ptr,
         .eu_payload_ptr,
         => blk: {

@@ -40,6 +40,10 @@ pub export fn entry4() void {
     };
     _ = U.foo(.{ .foo = 2, .bar = 2 });
 }
+pub export fn entry5() void {
+    comptime var y = .{ 1, 2};
+    y = .{ 3, 4 };
+}
 // pub export fn entry5() void {
 //     var x: u32 = 15;
 //     const T = @TypeOf(.{ @as(i32, -1234), @as(u32, 5678), x });
@@ -60,3 +64,4 @@ pub export fn entry4() void {
 // :31:19: error: value stored in comptime field does not match the default value of the field
 // :25:29: note: default value set here
 // :41:16: error: value stored in comptime field does not match the default value of the field
+// :45:12: error: value stored in comptime field does not match the default value of the field