cmd/gc: escape analysis bug

[rsc]

In the program below, 'i' is treated as not escaping, yet it does escape.  This can
cause crashes and memory corruption.

package main

import (
       "fmt"
)

type T struct {
       v *int
}

func foo(ch chan *T) {
       i := 42
       t := T{&i}
       defer func() {
               ch <- &t
       }()
}

func main() {
       ch := make(chan *T, 2)
       foo(ch)
       foo(ch)
       close(ch)
       for t := range ch {
               fmt.Printf("%v %v\n", t, *t.v)
       }
}

[lvdlvd]

Comment 1:

how annoying.   I thought about it for a bit and wrote
http://golang.org/cl/6061043

[lvdlvd]

Comment 2:

This issue was closed by revision 5583060.

Status changed to Fixed.

[lvdlvd]

Comment 3:

This issue was closed by revision 4318c86ac48f.