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Summary:
Xcode 6 beta 3 crashes consistently when I attempt to expand the "Previous definition is here" link in the included screenshot (see the zip file)

Steps to Reproduce:
1. Use the attached zip file, or
Create a new Xcode project from the single-view iOS app project and add "int overlay;" to the AppDelegate.m file right after the import statement.

2. Attempt to build the main target for the iOS simulator.

3. There should be an error message about the redefinition of "overlay" (This does not occur when you build for the device).

4. Expand the error message (as shown in the "crash-before.tiff" screenshot). 

5. When I click on the "Previous definition is here" message, Xcode immediately crashes.


Expected Results:
The code window should display the appropriate header file.

Actual Results:
See the crash-after.tiff screenshot in the attached zipfile.

Version:
Xcode 6 beta 3 OS X 10.9.4

Notes:


Configuration:
Xcode 6 beta 3 OS X 10.9.4

Zip file link: https://dl.dropboxusercontent.com/u/36329533/crashxcode.zip
"Before" screenshot: https://dl.dropboxusercontent.com/u/36329533/crashxcode/crash-before.tiff