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My app runs fine and as expected, but for some reason when I place breakpoints, stepping into/over/resuming causes the program to crash with EXC_BAD_ACCESS. This does not happen if I remove/disable breakpoints.
Any advice?
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EXC_BAD_ACCESS is an exception raised as a result of accessing bad memory. We're constantly working with pointers to memory in Swift that link to a specific memory address. An application will crash whenever we try to access a pointer that is invalid or no longer exists.
EXC_BAD_ACCESS means that message was sent to a point in the memory where there's no instance of a class to execute it. Thus “bad access”. You will get EXC_BAD_ACCESS in 3 cases: An object is not initialized.
From what I can see, LLDB appears to be broken in the Xcode 4.2 and 4.2.1. Switch to GDB in your "Edit Scheme" settings.
Breakpoints work just as expected after switching to GDB.
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To anyone that might experience the same thing with Xcode 5.0.1 and Mavericks: Try deleting all your schemes and auto create them again - that fixed it for me.
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