Thanks for the tip. It's usually not a problem to figure out what's wrong (the exception is dumped to the debugger), but it's a bit useless that the main editor in xcode switches to an irrelevant disassembly view at the same time :)

It shouldn't. Xcode usually switches to the shallowest stack frame that has source code available when hitting a breakpoint.

Oh, I was talking about uncaught exceptions where no breakpoint has been set.

Uncaught exceptions don't enter the debugger until it bubbles back up to main(), so the stack in the debugger is useless there.

Right, I was hoping this new Xcode 9.1 feature could improve upon that for Objective-C as well. Perhaps capturing a copy of the stack when the exception is raised, so it open the main editor window on the appropriate source line where that exception was raised.