diff --git a/lib/ace/mode/coffee/parser_test.js b/lib/ace/mode/coffee/parser_test.js
index a3082bd6..e4ccf1bb 100644
--- a/lib/ace/mode/coffee/parser_test.js
+++ b/lib/ace/mode/coffee/parser_test.js
@@ -45,35 +45,39 @@ function assertLocation(e, sl, sc, el, ec) {
     assert.equal(e.location.last_column, ec);
 }
 
+function parse(str) {
+    try {
+        coffee.parse(str).compile();
+    } catch (e) {
+        return e;
+    }
+}
+
 module.exports = {
     "test parse valid coffee script": function() {
         coffee.parse("square = (x) -> x * x");
     },
     
     "test parse invalid coffee script": function() {
-        try {
-            coffee.parse("a = 12 f");
-        } catch (e) {
-            assert.equal(e.message, "Unexpected 'IDENTIFIER'");
-            assertLocation(e, 0, 4, 0, 5);
-        }
+        var e = parse("a = 12 f");
+        assert.equal(e.message, "Unexpected 'IDENTIFIER'");
+        assertLocation(e, 0, 4, 0, 5);
     },
     
     "test parse missing bracket": function() {
-        try {
-            coffee.parse("a = 12 f {\n\n");
-        } catch (e) {
-            assert.equal(e.message, "missing }");
-            assertLocation(e, 0, 10, 0, 10);
-        }
+        var e = parse("a = 12 f {\n\n");
+        assert.equal(e.message, "missing }");
+        assertLocation(e, 0, 10, 0, 10);
     },
     "test unexpected indent": function() {
-        try {
-            coffee.parse("a\n  a\n");
-        } catch (e) {
-            assert.equal(e.message, "Unexpected 'INDENT'");
-            assertLocation(e, 0, 0, 0, 0);
-        }
+        var e = parse("a\n  a\n");
+        assert.equal(e.message, "Unexpected 'INDENT'");
+        assertLocation(e, 0, 0, 0, 0);
+    },
+    "test invalid destructuring": function() {
+        var e = parse("\n{b: 5} = {}");
+        assert.equal(e.message, '"5" cannot be assigned');
+        assertLocation(e, 1, 4, 1, 4);
     }
 };
 
diff --git a/lib/ace/mode/coffee_worker.js b/lib/ace/mode/coffee_worker.js
index f22640de..a5f700f8 100644
--- a/lib/ace/mode/coffee_worker.js
+++ b/lib/ace/mode/coffee_worker.js
@@ -40,7 +40,7 @@ window.addEventListener = function() {};
 
 var Worker = exports.Worker = function(sender) {
     Mirror.call(this, sender);
-    this.setTimeout(200);
+    this.setTimeout(250);
 };
 
 oop.inherits(Worker, Mirror);
@@ -51,7 +51,7 @@ oop.inherits(Worker, Mirror);
         var value = this.doc.getValue();
 
         try {
-            coffee.parse(value);
+            coffee.parse(value).compile();
         } catch(e) {
             var loc = e.location;
             if (loc) {