Open Radar

 
Summary:
When running any iOS app from Xcode 4.6.3 on Mavericks in the Simulator, Xcode crashes with the attached crash log if Xcode 5.0.1 (installed in a different location) ran before.

This is reproducible in Xcode 4.6.3 and 4.6.0.

Steps to Reproduce:
1. Install Xcode 5.0.1
2. Install Xcode 4.6.3 in a separate directory
3. Run Xcode 4.6.3 and install the Legacy Simulators as required on first launch
4. Debug on the Simulator (works fine)
5. Quit Xcode 4.6.3
6. Launch Xcode 5 and debug on the Simulator (works fine)
7. Quit Xcode 5
8. Run Xcode 4.6.3 and debug on the Simulator

Expected Results:
The Simulator should start, the app should run in debug mode.

Actual Results:
The Simulator starts, the launch image of the app is visible shortly, then Xcode crashes.

Version:
Xcode 4.6.3 (4H1503) on OS X 10.9 (13A603). Also is reproducible with Xcode 4.6.0.

Notes:
I need Xcode 4.6 to build and test iOS apps that haven't been ported to the iOS 7 UI yet. There's no way (at least known to me) to build "legacy UI" apps under Xcode 5.

Configuration:
Launching Xcode 5 after Xcode 4.6 seems to install or change some components that cause the subsequent crash of Xcode 4.6.