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50 lines
917 B
50 lines
917 B
4 months ago
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// run
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// issue 10253: cmd/gc: incorrect escape analysis of closures
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// Partial call x.foo was not promoted to heap.
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package main
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func main() {
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c := make(chan bool)
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// Create a new goroutine to get a default-size stack segment.
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go func() {
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x := new(X)
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clos(x.foo)()
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c <- true
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}()
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<-c
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}
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type X int
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func (x *X) foo() {
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}
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func clos(x func()) func() {
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f := func() {
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print("")
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x() // This statement crashed, because the partial call was allocated on the old stack.
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}
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// Grow stack so that partial call x becomes invalid if allocated on stack.
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growstack(10000)
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c := make(chan bool)
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// Spoil the previous stack segment.
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go func() {
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c <- true
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}()
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<-c
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return f
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}
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func growstack(x int) {
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if x == 0 {
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return
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}
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growstack(x - 1)
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}
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