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gc: bug268

Fixes #745.

R=ken2
CC=golang-dev
https://golang.org/cl/1008045
This commit is contained in:
Russ Cox 2010-04-29 15:52:27 -07:00
parent b5da6ea4dd
commit 10eb76b04e
2 changed files with 59 additions and 0 deletions

View File

@ -612,6 +612,12 @@ reswitch:
defaultlit(&n->left, T);
defaultlit(&n->right->left, types[TUINT]);
defaultlit(&n->right->right, types[TUINT]);
if(isfixedarray(n->left->type)) {
// Insert explicit & before fixed array
// so that back end knows to move to heap.
n->left = nod(OADDR, n->left, N);
typecheck(&n->left, top);
}
implicitstar(&n->left);
if(n->right->left == N) {
yyerror("missing slice bounds?");

53
test/fixedbugs/bug268.go Normal file
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@ -0,0 +1,53 @@
// $G $D/$F.go && $L $F.$A && ./$A.out
// Copyright 2010 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.
// http://code.google.com/p/go/issues/detail?id=745
package main
type T1 struct {
T2 *T2
}
type T2 struct {
T3 *T3
}
type T3 struct {
T4 []*T4
}
type T4 struct {
X int
}
func f() *T1 {
x := &T1{
&T2{
&T3{
[1]*T4{
&T4{5},
}[0:],
},
},
}
return x
}
func g(x int) {
if x == 0 {
return
}
g(x-1)
}
func main() {
x := f()
g(100) // smash temporaries left over on stack
if x.T2.T3.T4[0].X != 5 {
println("BUG", x.T2.T3.T4[0].X)
}
}