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master
test/fixedbugs/issue10353.go
49 строк
917 B
David Chase
cmd/internal/gc: improve flow of input params to output params
01 май 2015, 16:47
01 май 2015, 16:47
7fbb1b3
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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) }