Open Radar

 
Summary:
Doing a local search for the regex “(.*)+; //(.*)+^” will hang Xcode, and continue to hang every time the search field is opened.

Steps to Reproduce:
1. Open a file in Xcode
2. Open the in-pane search field with command+F
3. Change the Find options to “Regular Expression”
4. Paste the following regular expression in to the field: (.*)+; //(.*)+^

Expected Results:
Nothing is found, or some error is shown to indicate the regex is invalid

Actual Results:
Xcode hangs permanently, and hangs every time the search field is opened after relaunch.

Regression:
This happens in Xcode 7 beta as well as Xcode 6.

Notes:
The regex is cached in some global OS X cache. The cache can be cleared by opening a search bar in another application, like Safari, and changing the search text.