1 files changed, 29 insertions, 0 deletions
diff --git a/src/runtime/testdata/testprog/signal_bogus.go b/src/runtime/testdata/testprog/signal_bogus.go
new file mode 100644
index 0000000000..a372277d41
--- /dev/null
+++ b/src/runtime/testdata/testprog/signal_bogus.go
@@ -0,0 +1,29 @@
+// Copyright 2026 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.
+
+//go:build !plan9
+
+package main
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func init() {
+	register("SignalBogus", SignalBogus)
+}
+
+// signal.Notify should effectively ignore bogus signal numbers. Never writing
+// to the channel, but otherwise allowing Notify/Stop as normal.
+//
+// This is a regression test for https://go.dev/issue/77076, where bogus
+// signals used to make Stop hang if there were no real signals installed.
+func SignalBogus() {
+	ch := make(chan os.Signal, 1)
+	signal.Notify(ch, syscall.Signal(0xdead))
+	signal.Stop(ch)
+	println("OK")
+}