Xcode 4.0.2 Crashes on launch

Xcode crashes on launch, and I do not have any idea why. I downloaded 4.0.2 + iOS SDK (4.3) and installed it. Then I tried to open it and it crashed on launch... Here is my console log that relates to the crash

enter cdyld: Library not loaded: /System/Library/Pri开发者_如何学编程vateFrameworks/CoreSymbolication.framework/Versions/A/CoreSymbolication 6/14/11 6:10:55 PM  [0x0-0x287287].com.apple.dt.Xcode[18402]
  Referenced from: /iPhoneSDK/Applications/Xcode.app/Contents/MacOS/../../../../Library/PrivateFrameworks/DVTFoundation.framework/Versions/A/DVTFoundation  6/14/11 6:10:55 PM  [0x0-0x287287].com.apple.dt.Xcode[18402]
  Reason: image not found   6/14/11 6:10:55 PM  [0x0-0x287287].com.apple.dt.Xcode[18402]
catch_mach_exception_raise_state_identity(): PID: 18405 thread: 0x16c77 type: 0xa code: 0x1000f7044 codeCnt: 0x2 flavor: 0x1000f7054 old_state: 0x1000f705c old_stateCnt: 0x2c new_state: 0x1000f802c new_stateCnt: 0x1000f8028 6/14/11 6:10:55 PM  com.apple.launchd.peruser.501[167]
(com.apple.ReportCrash.Self[18405]) Job appears to have crashed: Trace/BPT trap 6/14/11 6:10:55 PM  com.apple.launchd.peruser.501[167]
catch_mach_exception_raise_state_identity(): PID: 18404 thread: 0x17037 type: 0xa code: 0x7fff5fbfdf14 codeCnt: 0x2 flavor: 0x7fff5fbfdf24 old_state: 0x7fff5fbfdf2c old_stateCnt: 0x2c new_state: 0x7fff5fbfe43c new_stateCnt: 0x7fff5fbfe438  6/14/11 6:10:55 PM  com.apple.launchd.peruser.501[167]
(com.apple.ReportCrash[18404]) Job appears to have crashed: Trace/BPT trap  6/14/11 6:10:55 PM  com.apple.launchd.peruser.501[167]
catch_mach_exception_raise_state_identity(): PID: 18402 thread: 0x1703b type: 0xa code: 0x7fff5fbfdf14 codeCnt: 0x2 flavor: 0x7fff5fbfdf24 old_state: 0x7fff5fbfdf2c old_stateCnt: 0x2c new_state: 0x7fff5fbfe43c new_stateCnt: 0x7fff5fbfe438  6/14/11 6:10:55 PM  com.apple.launchd.peruser.501[167]
([0x0-0x287287].com.apple.dt.Xcode[18402]) Job appears to have crashed: Trace/BPT trap  6/14/11 6:10:55 PM  com.apple.launchd.peruser.501[167]ode here

It looks like CoreSymbolication does not exist on your machine. I would uninstall and reinstall.

I had a similar problem with two Xcode versions which both failed to start.

I initially had Xcode 4.0.1 (back then the world was still a good place).

I wanted to see how our App looks when compiled with the current iOS SDK 5.0

1. So I installed Xcode 4.2 on top of Xcode 4.0.1 (overriding it completely)
2. I tested some stuff in my app and realized that I need to fallback to Xcode < 4.2
3. I installed Xcode 4.1. During the installation process the installer told me that the current installation would move from /Developer to /Developer-4.2
4. After all this neither of installed Xcode versions worked anymore which is bad.

I decided to uninstall Xcode 4.2 first and then reinstall Xcode 4.1 again.

1. I uninstalled Xcode 4.2 with the command sudo /Developer-4.2/Library/uninstall-devtools
2. I run the Xcode 4.1 installer again from /Applications/Install Xcode.app
3. After the installation Xcode 4.1 opened so it worked again...

I reinstalled via sudo /Developer/Library/uninstall-devtools and the App Store

But the offending source was restored, so Xcode crashed again. Boo!

I renamed the offending source's folder so Xcode couldn't find it.

Xcode couldn't find the source, and never crashed, which allowed me to get back to work.

Extremely Obvious Feature Request to Apple: hold 'option' to suppress previous projects from loading, plus a command line to do the same.