mirror of
https://github.com/golang/go
synced 2024-07-21 01:55:06 +00:00
6adaf17eaa
When a subsequent load/store of a ptr makes the nil check of that pointer unnecessary, if their lines differ, change the line of the load/store to that of the nilcheck, and attempt to rehome the load/store position instead. This fix makes profiling less accurate in order to make panics more informative. Fixes #33724 Change-Id: Ib9afaac12fe0d0320aea1bf493617facc34034b3 Reviewed-on: https://go-review.googlesource.com/c/go/+/200197 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
46 lines
873 B
Go
46 lines
873 B
Go
// run
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package main
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import (
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"fmt"
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"runtime/debug"
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"strings"
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)
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type Inner struct {
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Err int
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}
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func (i *Inner) NotExpectedInStackTrace() int {
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if i == nil {
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return 86
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}
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return 17 + i.Err
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}
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type Outer struct {
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Inner
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}
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func ExpectedInStackTrace() {
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var o *Outer
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println(o.NotExpectedInStackTrace())
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}
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func main() {
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defer func() {
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if r := recover(); r != nil {
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stacktrace := string(debug.Stack())
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if strings.Contains(stacktrace, "NotExpectedInStackTrace") {
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fmt.Println("FAIL, stacktrace contains NotExpectedInStackTrace")
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}
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if !strings.Contains(stacktrace, "ExpectedInStackTrace") {
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fmt.Println("FAIL, stacktrace does not contain ExpectedInStackTrace")
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}
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} else {
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fmt.Println("FAIL, should have panicked but did not")
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}
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}()
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ExpectedInStackTrace()
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}
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