fixed really nasty bug, requestTransaction was called synchronously

src/Types/Array.js

@@ -123,6 +123,9 @@
       if (pos + length > this.idArray.length || pos < 0 || length < 0) {
         throw new Error("The deletion range exceeds the range of the array!");
       }
+      if (length === 0) {
+        return;
+      }
       var eventHandler = this.eventHandler;
       var newLeft = pos > 0 ? JSON.parse(this.idArray[pos - 1]) : null;
       var dels = [];

src/Types/TextBind.spec.js

@@ -0,0 +1,50 @@
+/* @flow */
+/*eslint-env browser,jasmine */
+
+describe("TextBind Type", function(){
+  jasmine.DEFAULT_TIMEOUT_INTERVAL = 5000;
+  beforeEach(function(done){
+    createUsers(this, 5, done);
+  });
+
+  describe("debug tests", function(){
+    it("#1", function(done){
+      var y = this.users[0].root;
+      var y2 = this.users[1].root;
+      var y3 = this.users[2].root;
+      var c1 = this.users[0].connector;
+      var c2 = this.users[1].connector;
+      var c3 = this.users[2].connector;
+      function flushOneAndTwo(){
+        c1.flush();
+        c2.flush();
+      }
+      var u1, u2;
+      y.set("text", Y.TextBind);
+      flushOneAndTwo();
+      y.get("text").then(function(array) {
+        u1 = array;
+        flushOneAndTwo();
+        return y2.get("text");
+      }).then(function(array){
+        u2 = array;
+        u1.insert(0, "a");
+        flushOneAndTwo();
+        u2.insert(1, "b");
+        flushOneAndTwo();
+        u1.insert(2, "c");
+        flushOneAndTwo();
+        u2.insert(3, "d");
+        y3.observe(function(events){
+          for (var event of events) {
+            if (event.name === "text") {
+              y3.get("text");
+            }
+          }
+        });
+        c3.flush();
+        done();
+      });
+    });
+  });
+});