Win64, latest svn.

Backtrace:

> blender.exe!CompositorOperation::executeRegion(rcti * rect=0x0000000000000000, unsigned int tileNumber=170282272) Line 199 + 0x6 bytes C++
blender.exe!CPUDevice::execute(WorkPackage * work=0x000000000a695460) Line 35 C++
blender.exe!WorkScheduler::thread_execute_cpu(void * data=0xffffffffffffffff) Line 150 C++
pthreadVC2.dll!00000000005a5ce5()
[Frames below may be incorrect and/or missing, no symbols loaded for pthreadVC2.dll]
pthreadVC2.dll!00000000005a9437()
pthreadVC2.dll!00000000005a94eb()
kernel32.dll!00000000770e652d()
ntdll.dll!000000007721c521()


I have no saved node tree but the crash occured when i was placing the alpha (?) input on the overlay node? Not sure, but I was playing with the overlay node.