fix String method of free action using nil targets

1 files changed, 14 insertions, 5 deletions

diff --git a/go/game/action.go b/go/game/action.go
index 5bb8bd67..856ea6bc 100644
--- a/go/game/action.go
+++ b/go/game/action.go
@@ -682,13 +682,22 @@ func NewFreeAction(p Permanent, resolveProto ActionFuncPrototype, costFunc Actio
 
 func (a *FreeAction) Speed() ActionSpeed { return fast }
 
-func (a *FreeAction) String() string {
-	p := a.source.(Permanent)
-	if a.targets.RequireSelection() {
-		return fmt.Sprintf("free_action %s", a.desc)
+func (a *FreeAction) String() (s string) {
+	switch src := a.source.(type) {
+	case *Card:
+		s += fmt.Sprintf("%v: %s ", a.Controller(), src.Name)
+	default:
+		s += fmt.Sprintf("%s", src)
 	}
 
-	return fmt.Sprintf("%v: %s free_action@%v", p.Controller(), p.Card().Name, a.targets)
+	s += " free_action"
+	if a.targets == nil || a.targets.RequireSelection() {
+		s += fmt.Sprintf(" %s", a.desc)
+	} else {
+		s += fmt.Sprintf("@%v", a.targets)
+	}
+
+	return
 }
 
 var buyActionTargetDesc = TargetDesc{"store card", "?"}