Xcode 4 keeps crashing

Everytime I try to provision my app onto my iPhone 4, the iPhone screen goes black with the status bar like its about to start the app, but in Xcode I get the spinning rainbow globe and have to force quit every ti开发者_开发技巧me.

I cleaned the target, cleaned the caches with onyx, and repaired permissions, but its still happening. Please help!!

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I inserted a breakpoint in the main.m file, and all of a sudden it works. Either after not trying for a while, or by jutting it into working.