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// run
// Copyright 2015 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 10253: cmd/gc: incorrect escape analysis of closures
// Partial call x.foo was not promoted to heap.
package main
func main() {
c := make(chan bool)
// Create a new goroutine to get a default-size stack segment.
go func() {
x := new(X)
clos(x.foo)()
c <- true
}()
<-c
}
type X int
func (x *X) foo() {
}
func clos(x func()) func() {
f := func() {
print("")
x() // This statement crashed, because the partial call was allocated on the old stack.
}
// Grow stack so that partial call x becomes invalid if allocated on stack.
growstack(10000)
c := make(chan bool)
// Spoil the previous stack segment.
go func() {
c <- true
}()
<-c
return f
}
func growstack(x int) {
if x == 0 {
return
}
growstack(x - 1)
}
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