go source for verification 2026-05-22

test/fixedbugs/issue28078.go

@@ -0,0 +1,34 @@
+// compile
+
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Non-constant duplicate keys/cases should not be reported
+// as errors by the compiler.
+
+package p
+
+import "unsafe"
+
+func f() {
+	_ = map[uintptr]int{
+		0:                            0,
+		uintptr(unsafe.Pointer(nil)): 0,
+	}
+
+	switch uintptr(0) {
+	case 0:
+	case uintptr(unsafe.Pointer(nil)):
+	}
+
+	switch interface{}(nil) {
+	case nil:
+	case nil:
+	}
+
+	_ = map[interface{}]int{
+		nil: 0,
+		nil: 0,
+	}
+}