Merge pull request #358 from sheelc/safari_exception_fix

Fix spec to throw error, ensuring a stack property

spec/core/ExceptionFormatterSpec.js

@@ -41,7 +41,8 @@ describe("ExceptionFormatter", function() {
 
   describe("#stack", function() {
     it("formats stack traces from Webkit, Firefox or node.js", function() {
-      var error = new Error("an error");
+      var error;
+      try { throw new Error("an error") } catch(e) { error = e; };
       expect(new j$.ExceptionFormatter().stack(error)).toMatch(/ExceptionFormatterSpec\.js.*\d+/)
     });