| Linux in-mum-web1499.main-hosting.eu 5.14.0-503.40.1.el9_5.x86_64 #1 SMP PREEMPT_DYNAMIC Mon May 5 06:06:04 EDT 2025 x86_64 Path : /opt/golang/1.22.0/test/fixedbugs/ |
| Current File : //opt/golang/1.22.0/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()
*/