make sure operationEnd events are not emitted to wrong session

node_modules/ace/lib/ace/editor.js

@@ -276,6 +276,10 @@ var Editor = function(renderer, session) {
         if (this.session == session)
             return;
         
+        // make sure operationEnd events are not emitted to wrong session
+        if (this.curOp) this.endOperation();
+        this.curOp = {};
+
         var oldSession = this.session;
         if (oldSession) {
             this.session.removeEventListener("change", this.$onDocumentChange);
@@ -372,6 +376,8 @@ var Editor = function(renderer, session) {
             oldSession: oldSession
         });
         
+        this.curOp = null;
+        
         oldSession && oldSession._signal("changeEditor", {oldEditor: this});
         session && session._signal("changeEditor", {editor: this});
     };