case <-After(1 * Second):
		t.Fatalf("negative timeout didn't fire")
	}
}

// Test that a panic while deleting a timer does not leave
// the timers mutex held, deadlocking a ticker.Stop in a defer.
func TestIssue5745(t *testing.T) {
	ticker := NewTicker(Hour)
	defer func() {
		// would deadlock here before the fix due to
		// lock taken before the segfault.
		ticker.Stop()

		if r := recover(); r == nil {