mirror of
https://github.com/golang/go
synced 2024-11-25 16:27:57 -07:00
49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
|
// $G $D/$F.go && $L $F.$A && ./$A.out >/dev/null 2>&1 || echo BUG: bug206
|
||
|
|
|
||
|
|
// Copyright 2009 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.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "go/ast";
|
||
|
|
|
||
|
|
func g(list []ast.Expr) {
|
||
|
|
n := len(list)-1;
|
||
|
|
println(list[n].Pos().Line);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// f is the same as g except that the expression assigned to n is inlined.
|
||
|
|
func f(list []ast.Expr) {
|
||
|
|
// n := len(list)-1;
|
||
|
|
println(list[len(list)-1 /* n */].Pos().Line);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
list := []ast.Expr{&ast.Ident{}};
|
||
|
|
g(list); // this works
|
||
|
|
f(list); // this doesn't
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
0
|
||
|
|
throw: index out of range
|
||
|
|
|
||
|
|
panic PC=0x2bcf10
|
||
|
|
throw+0x33 /home/gri/go/src/pkg/runtime/runtime.c:71
|
||
|
|
throw(0x470f8, 0x0)
|
||
|
|
sys·throwindex+0x1c /home/gri/go/src/pkg/runtime/runtime.c:45
|
||
|
|
sys·throwindex()
|
||
|
|
main·f+0x26 /home/gri/go/test/bugs/bug206.go:16
|
||
|
|
main·f(0x2b9560, 0x0)
|
||
|
|
main·main+0xc3 /home/gri/go/test/bugs/bug206.go:23
|
||
|
|
main·main()
|
||
|
|
mainstart+0xf /home/gri/go/src/pkg/runtime/amd64/asm.s:55
|
||
|
|
mainstart()
|
||
|
|
goexit /home/gri/go/src/pkg/runtime/proc.c:133
|
||
|
|
goexit()
|
||
|
|
*/
|