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https://github.com/golang/go
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319b75ed33
Fixes #58141 Co-authored-by: Richard Musiol <neelance@gmail.com> Co-authored-by: Achille Roussel <achille.roussel@gmail.com> Co-authored-by: Julien Fabre <ju.pryz@gmail.com> Co-authored-by: Evan Phoenix <evan@phx.io> Change-Id: I49b66946acc90fdf09ed9223096bfec9a1e5b923 Reviewed-on: https://go-review.googlesource.com/c/go/+/479627 Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Auto-Submit: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com> Auto-Submit: Ian Lance Taylor <iant@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> TryBot-Bypass: Ian Lance Taylor <iant@golang.org>
105 lines
1.7 KiB
Go
105 lines
1.7 KiB
Go
// buildrun -t 45
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//go:build !js && !wasip1
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// +build !js,!wasip1
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Ensure that runtime traceback does not infinite loop for
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// the testcase below.
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package main
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import (
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"bytes"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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)
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const prog = `
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package main
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import "context"
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var gpi *int
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type nAO struct {
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eE bool
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}
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type NAO func(*nAO)
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func WEA() NAO {
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return func(o *nAO) { o.eE = true }
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}
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type R struct {
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cM *CM
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}
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type CM int
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type A string
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func (m *CM) NewA(ctx context.Context, cN string, nn *nAO, opts ...NAO) (*A, error) {
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for _, o := range opts {
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o(nn)
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}
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s := A("foo")
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return &s, nil
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}
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func (r *R) CA(ctx context.Context, cN string, nn *nAO) (*int, error) {
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cA, err := r.cM.NewA(ctx, cN, nn, WEA(), WEA())
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if err == nil {
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return nil, err
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}
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println(cA)
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x := int(42)
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return &x, nil
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}
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func main() {
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c := CM(1)
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r := R{cM: &c}
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var ctx context.Context
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nnr := nAO{}
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pi, err := r.CA(ctx, "foo", nil)
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if err != nil {
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panic("bad")
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}
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println(nnr.eE)
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gpi = pi
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}
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`
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func main() {
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dir, err := ioutil.TempDir("", "46234")
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if err != nil {
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log.Fatal(err)
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}
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defer os.RemoveAll(dir)
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file := filepath.Join(dir, "main.go")
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if err := ioutil.WriteFile(file, []byte(prog), 0655); err != nil {
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log.Fatalf("Write error %v", err)
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}
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cmd := exec.Command("go", "run", file)
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output, err := cmd.CombinedOutput()
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if err == nil {
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log.Fatalf("Passed, expected an error")
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}
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want := []byte("nil pointer dereference")
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if !bytes.Contains(output, want) {
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log.Fatalf("Unmatched error message %q:\nin\n%s\nError: %v", want, output, err)
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}
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}
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