| // 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() | 
 | } |