Merge pull request #292 from slingamn/nilreceivers

re-add nil receiver for ModeSet.HasMode

irc/modes/modes.go

@@ -341,6 +341,10 @@ func NewModeSet() *ModeSet {
 
 // test whether `mode` is set
 func (set *ModeSet) HasMode(mode Mode) bool {
+	if set == nil {
+		return false
+	}
+
 	return utils.BitsetGet(set[:], uint(mode)-minMode)
 }
 

irc/modes/modes_test.go

@@ -78,7 +78,8 @@ func TestSetMode(t *testing.T) {
 }
 
 func TestNilReceivers(t *testing.T) {
-	var set ModeSet
+	set := NewModeSet()
+	set = nil
 
 	if set.HasMode(Invisible) {
 		t.Errorf("nil ModeSet should not have any modes")