| // run |
| |
| // 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. |
| |
| // Issue 26248: gccgo miscompiles interface field expression. |
| // In G().M where G returns an interface, G() is evaluated twice. |
| |
| package main |
| |
| type I interface { |
| M() |
| } |
| |
| type T struct{} |
| |
| func (T) M() {} |
| |
| var g = 0 |
| |
| //go:noinline |
| func G() I { |
| g++ |
| return T{} |
| } |
| |
| //go:noinline |
| func Use(interface{}) {} |
| |
| func main() { |
| x := G().M |
| Use(x) |
| |
| if g != 1 { |
| println("want 1, got", g) |
| panic("FAIL") |
| } |
| } |
