go source for verification 2026-05-22

test/fixedbugs/issue20530.go

@@ -0,0 +1,34 @@
+// run
+
+// Copyright 2017 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.
+
+package main
+
+var a uint8
+
+//go:noinline
+func f() {
+	b := int8(func() int32 { return -1 }())
+	a = uint8(b)
+	if int32(a) != 255 {
+		// Failing case prints 'got 255 expected 255'
+		println("got", a, "expected 255")
+	}
+}
+
+//go:noinline
+func g() {
+	b := int8(func() uint32 { return 0xffffffff }())
+	a = uint8(b)
+	if int32(a) != 255 {
+		// Failing case prints 'got 255 expected 255'
+		println("got", a, "expected 255")
+	}
+}
+
+func main() {
+	f()
+	g()
+}