go bug206 源码
golang bug206 代码
文件路径：/test/fixedbugs/bug206.go
// run
// 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());
}
// 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());
}
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()
*/
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