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-rw-r--r--test/fixedbugs/issue46234.go104
1 files changed, 104 insertions, 0 deletions
diff --git a/test/fixedbugs/issue46234.go b/test/fixedbugs/issue46234.go
new file mode 100644
index 0000000..ae28019
--- /dev/null
+++ b/test/fixedbugs/issue46234.go
@@ -0,0 +1,104 @@
+// buildrun -t 45
+
+//go:build !js && !wasip1
+// +build !js,!wasip1
+
+// Copyright 2021 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.
+
+// Ensure that runtime traceback does not infinite loop for
+// the testcase below.
+
+package main
+
+import (
+ "bytes"
+ "io/ioutil"
+ "log"
+ "os"
+ "os/exec"
+ "path/filepath"
+)
+
+const prog = `
+
+package main
+
+import "context"
+
+var gpi *int
+
+type nAO struct {
+ eE bool
+}
+
+type NAO func(*nAO)
+
+func WEA() NAO {
+ return func(o *nAO) { o.eE = true }
+}
+
+type R struct {
+ cM *CM
+}
+
+type CM int
+
+type A string
+
+func (m *CM) NewA(ctx context.Context, cN string, nn *nAO, opts ...NAO) (*A, error) {
+ for _, o := range opts {
+ o(nn)
+ }
+ s := A("foo")
+ return &s, nil
+}
+
+func (r *R) CA(ctx context.Context, cN string, nn *nAO) (*int, error) {
+ cA, err := r.cM.NewA(ctx, cN, nn, WEA(), WEA())
+ if err == nil {
+ return nil, err
+ }
+ println(cA)
+ x := int(42)
+ return &x, nil
+}
+
+func main() {
+ c := CM(1)
+ r := R{cM: &c}
+ var ctx context.Context
+ nnr := nAO{}
+ pi, err := r.CA(ctx, "foo", nil)
+ if err != nil {
+ panic("bad")
+ }
+ println(nnr.eE)
+ gpi = pi
+}
+`
+
+func main() {
+ dir, err := ioutil.TempDir("", "46234")
+ if err != nil {
+ log.Fatal(err)
+ }
+ defer os.RemoveAll(dir)
+
+ file := filepath.Join(dir, "main.go")
+ if err := ioutil.WriteFile(file, []byte(prog), 0655); err != nil {
+ log.Fatalf("Write error %v", err)
+ }
+
+ cmd := exec.Command("go", "run", file)
+ output, err := cmd.CombinedOutput()
+ if err == nil {
+ log.Fatalf("Passed, expected an error")
+ }
+
+ want := []byte("nil pointer dereference")
+ if !bytes.Contains(output, want) {
+ log.Fatalf("Unmatched error message %q:\nin\n%s\nError: %v", want, output, err)
+ }
+}