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// Copyright 2019 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.
// Make sure tracebacks from initialization code are reported correctly.
package a
import (
"fmt"
"runtime"
"strings"
)
var x = f() // line 15
func f() int {
var b [4096]byte
n := runtime.Stack(b[:], false) // line 19
s := string(b[:n])
var pcs [10]uintptr
n = runtime.Callers(1, pcs[:]) // line 22
// Check the Stack results.
if debug {
println(s)
}
if strings.Contains(s, "autogenerated") {
panic("autogenerated code in traceback")
}
if !strings.Contains(s, "a.go:15") {
panic("missing a.go:15")
}
if !strings.Contains(s, "a.go:19") {
panic("missing a.go:19")
}
if !strings.Contains(s, "a.init") {
panic("missing a.init")
}
// Check the CallersFrames results.
if debug {
iter := runtime.CallersFrames(pcs[:n])
for {
f, more := iter.Next()
fmt.Printf("%s %s:%d\n", f.Function, f.File, f.Line)
if !more {
break
}
}
}
iter := runtime.CallersFrames(pcs[:n])
f, more := iter.Next()
if f.Function != "test/a.f" || !strings.HasSuffix(f.File, "a.go") || f.Line != 22 {
panic(fmt.Sprintf("bad f %v\n", f))
}
if !more {
panic("traceback truncated after f")
}
f, more = iter.Next()
if f.Function != "test/a.init" || !strings.HasSuffix(f.File, "a.go") || f.Line != 15 {
panic(fmt.Sprintf("bad init %v\n", f))
}
if !more {
panic("traceback truncated after init")
}
f, _ = iter.Next()
if !strings.HasPrefix(f.Function, "runtime.") {
panic("runtime. driver missing")
}
return 0
}
const debug = false