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sync/errgroup: PanicError.Error print stack trace

Browse source 
Because it is useful to print the stack
when a nil pointer dereference occurs.

Fixes golang/go#73710

Change-Id: I106ea0bdd70c2a293f5ea889edef9b5ba9db2fbd
Reviewed-on: https://go-review.googlesource.com/c/sync/+/672635
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Bypass: Damien Neil <dneil@google.com>
This commit is contained in:
qiulaidongfeng 2025-05-14 21:43:26 +08:00 • committed by Gopher Robot
commit d1ac909e84
2 changed files with 6 additions and 5 deletions
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5
errgroup/errgroup.go
View file

@ -185,8 +185,9 @@ type PanicError struct {
}
func (p PanicError) Error() string {
// A Go Error method conventionally does not include a stack dump, so omit it
// here. (Callers who care can extract it from the Stack field.)
if len(p.Stack) > 0 {
return fmt.Sprintf("recovered from errgroup.Group: %v\n%s", p.Recovered, p.Stack)
}
return fmt.Sprintf("recovered from errgroup.Group: %v", p.Recovered)
}

6
errgroup/errgroup_test.go
View file

@ -309,9 +309,9 @@ func TestPanic(t *testing.T) {
if pe.Recovered != p {
t.Fatalf("got %v, want %v", pe.Recovered, p)
}
if !strings.Contains(string(pe.Stack), "TestPanic.func") {
t.Log(string(pe.Stack))
t.Fatalf("stack trace incomplete")
if !strings.Contains(pe.Error(), "TestPanic.func") {
t.Log(pe.Error())
t.Fatalf("stack trace incomplete, does not contain TestPanic.func")
}
}()
g.Wait()