Snapshot context actions under client lock

admin.go

@@ -490,11 +490,21 @@ func (b *Barnard) adminACLItems() []uiterm.TreeItem {
 }
 
 func (b *Barnard) adminContextActionItems() []uiterm.TreeItem {
-	if b.Client == nil || len(b.Client.ContextActions) == 0 {
+	if b.Client == nil {
+		return []uiterm.TreeItem{adminItem{label: "No context actions available"}}
+	}
+	var actions []*gumble.ContextAction
+	b.Client.Do(func() {
+		actions = make([]*gumble.ContextAction, 0, len(b.Client.ContextActions))
+		for _, action := range b.Client.ContextActions {
+			actions = append(actions, action)
+		}
+	})
+	if len(actions) == 0 {
 		return []uiterm.TreeItem{adminItem{label: "No context actions available"}}
 	}
 	items := []uiterm.TreeItem{}
-	for _, action := range b.Client.ContextActions {
+	for _, action := range actions {
 		ca := action
 		label := ca.Label
 		if label == "" {
@@ -830,7 +840,8 @@ func (b *Barnard) executeContextCommand(fields []string) {
 		b.AddOutputLine("Admin: usage /admin context <action> [server|user|channel] [target]")
 		return
 	}
-	action := b.Client.ContextActions[fields[1]]
+	var action *gumble.ContextAction
+	b.Client.Do(func() { action = b.Client.ContextActions[fields[1]] })
 	if action == nil {
 		b.AddOutputLine("Admin: context action not found")
 		return