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// run
// Copyright 2014 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 (
"fmt"
"io"
"runtime"
)
type T struct {
io.Closer
}
func f1() {
// The 5 here and below depends on the number of internal runtime frames
// that sit between a deferred function called during panic and
// the original frame. If that changes, this test will start failing and
// the number here will need to be updated.
defer checkLine(5)
var t *T
var c io.Closer = t
c.Close()
}
func f2() {
defer checkLine(5)
var t T
var c io.Closer = t
c.Close()
}
func main() {
f1()
f2()
}
func checkLine(n int) {
if err := recover(); err == nil {
panic("did not panic")
}
var file string
var line int
for i := 1; i <= n; i++ {
_, file, line, _ = runtime.Caller(i)
if file != "<autogenerated>" || line != 1 {
continue
}
return
}
panic(fmt.Sprintf("expected <autogenerated>:1 have %s:%d", file, line))
}
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