EXC_BAD_ACCESS is _class_getName when throwing NSException with ARC enabled

text

Throwing an exception like this:

  @throw [NSException exceptionWithName:@"Exception" reason:@"none" userInfo:nil];

in a method, and trying to catch it in a method up the stack, causes a EXC_BAD_ACCESS in:

#0	0x36221fd0 in _class_getName ()
#1	0x36221fbc in object_getClassName ()
#2	0x362261fe in objc_exception_throw ()

But only on an iOS device.
The exact same code works as expected without a crash on the simulator.

Workarounds:
* Use CFBridgingRetain() on the exception (shown in the example project)
* or store the exception to a local variable first and then throw it

Filed as rdar://10330762

@tylercollier: Yeah, so it looks like Apple fixed that then.