Commit a2517117e7

@@ -7795,6 +7795,10 @@ fn zirHasField(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Ai
                 if (mem.eql(u8, name, field_name)) break true;
             } else false;
         }
+        if (ty.isTuple()) {
+            const field_index = std.fmt.parseUnsigned(u32, field_name, 10) catch break :hf false;
+            break :hf field_index < ty.structFieldCount();
+        }
         break :hf switch (ty.zigTypeTag()) {
             .Struct => ty.structFields().contains(field_name),
             .Union => ty.unionFields().contains(field_name),

@@ -38,4 +38,12 @@ test "@hasField" {
     const anon = @TypeOf(.{ .a = 1 });
     try expect(@hasField(anon, "a") == true);
     try expect(@hasField(anon, "b") == false);
+
+    const tuple = @TypeOf(.{ 1, 2 });
+    try expect(@hasField(tuple, "a") == false);
+    try expect(@hasField(tuple, "b") == false);
+    try expect(@hasField(tuple, "0") == true);
+    try expect(@hasField(tuple, "1") == true);
+    try expect(@hasField(tuple, "2") == false);
+    try expect(@hasField(tuple, "9999999999999999999999999") == false);
 }