Rejecting promise when parsing fails

spec/parser/javascript_spec.js

@@ -9,7 +9,7 @@ describe('parser/javascript.js', function() {
     this.parser = new Parser();
   });
 
-  describe('#parser', function() {
+  describe('#parse', function() {
 
     beforeEach(function() {
       spyOn(regexpParser, 'parse');
@@ -42,6 +42,15 @@ describe('parser/javascript.js', function() {
         .done();
     });
 
+    it('rejects the returned promise with the exception thrown', function(done) {
+      this.parser.parse('/example')
+        .then(null, result => {
+          expect(result).toBeDefined();
+        })
+        .finally(done)
+        .done();
+    });
+
   });
 
   describe('#render', function() {

src/js/parser/javascript.js

@@ -16,10 +16,15 @@ export default class Parser {
     var deferred = Q.defer();
 
     setTimeout(() => {
-      javascript.Parser.SyntaxNode.state = this.state;
+      try {
+        javascript.Parser.SyntaxNode.state = this.state;
 
-      this.parsed = javascript.parse(expression.replace(/\n/g, '\\n'));
-      deferred.resolve(this);
+        this.parsed = javascript.parse(expression.replace(/\n/g, '\\n'));
+        deferred.resolve(this);
+      }
+      catch(e) {
+        deferred.reject(e);
+      }
     });
 
     return deferred.promise;