[SOLVED] Retain count exhausted after @throw

Retain count exhausted after @throw

When I run this code inside a call made from SenTest's STAssertThrowsSpecificNamed:

@throw [[NSException alloc] initWithName:NSInvalidArchiveOperationException
                                  reason:@"---some reason----"
                               userInfo:nil];

I get (with NSZombieEnabled=YES):

*** -[NSException reason]: message sent to deallocated instance 0x100a81d60

The exception is somehow deallocated before STAssertThrowsSpecificNamed has finished processing it.

I can avoid the error by replacing the @throw line above with this code:

NSException *exception = [NSException exceptionWithName:NSInvalidArchiveOperationException
                                                 reason:@"---some reason----"
                                               userInfo:nil];
@throw exception;

I get exactly the same behavior with or without ARC. Without ARC this code avoids the error too:

@throw [[[NSException alloc] initWithName:NSInvalidArchiveOperationException
                                   reason:@"---some reason----"
                                userInfo:nil] retain];

Is this a bug in SenTest? Or a bug in the compiler? Or is my first @throw just incorrect?

Solution

I'm now exclusively using +[NSException raise:format:] under both ARC and manual retain–release.