Fix render issues that occurs when jumpToLine isn't provided

src/core/components/errors.jsx

@@ -68,7 +68,7 @@ const ThrownErrorItem = ( { error, jumpToLine } ) => {
             { error.get("message") }
           </span>
           <div>
-            { errorLine ? <a onClick={jumpToLine.bind(null, errorLine)}>Jump to line { errorLine }</a> : null }
+            { errorLine && jumpToLine ? <a onClick={jumpToLine.bind(null, errorLine)}>Jump to line { errorLine }</a> : null }
           </div>
         </div>
       }
@@ -106,6 +106,10 @@ ThrownErrorItem.propTypes = {
   jumpToLine: PropTypes.func
 }
 
+ThrownErrorItem.defaultProps = {
+  jumpToLine: null
+}
+
 SpecErrorItem.propTypes = {
   error: PropTypes.object.isRequired,
   jumpToLine: PropTypes.func