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      1 // run
      2 
      3 // Copyright 2012 The Go Authors. All rights reserved.
      4 // Use of this source code is governed by a BSD-style
      5 // license that can be found in the LICENSE file.
      6 
      7 // issue 4066: return values not being spilled eagerly enough
      8 
      9 package main
     10 
     11 func main() {
     12 	n := foo()
     13 	if n != 2 {
     14 		println(n)
     15 		panic("wrong return value")
     16 	}
     17 }
     18 
     19 type terr struct{}
     20 
     21 func foo() (val int) {
     22 	val = 0
     23 	defer func() {
     24 		if x := recover(); x != nil {
     25 			_ = x.(terr)
     26 		}
     27 	}()
     28 	for {
     29 		val = 2
     30 		foo1()
     31 	}
     32 	panic("unreachable")
     33 }
     34 
     35 func foo1() {
     36 	panic(terr{})
     37 }
     38