Re: Seg fault in [NSAutoreleasePool release]

[Fred Kiefer]

Stefan Bidigaray wrote:
> Not sure if this is my fault or not!  I've gotten this quite often in
> testing the NSSound stuff... I've attached a copy of the program.  I'm
> not sure if it's something I'm doing, or what?  I'm using SVN r28323
> (it's kind of old).
> 
> Here's the gdb output:
> (gdb) r
> Starting program: /root/obj/nssoundtest ../sample.au
> [Thread debugging using libthread_db enabled]
> [New Thread 0x7f5c43b546f0 (LWP 16334)]
> 2009-06-21 18:09:54.846 nssoundtest[16334] Unknown time zone name `CST'.
> 2009-06-21 18:09:54.846 nssoundtest[16334] Using time zone with absolute
> offset 0.
> 2009-06-21 18:09:54.842 nssoundtest[16334] Duration: 6309616
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7f5c43b546f0 (LWP 16334)]
> 0x00007f5c429a3817 in get_imp () from /usr/lib/libobjc.so.2
> (gdb) bt
> #0  0x00007f5c429a3817 in get_imp () from /usr/lib/libobjc.so.2
> #1  0x00007f5c42f534db in -[NSAutoreleasePool emptyPool] (self=0xa302a0,
>     _cmd=0x7f5c434267f0) at NSAutoreleasePool.m:438
> #2  0x00007f5c42f532de in -[NSAutoreleasePool dealloc] (self=0xa302a0,
>     _cmd=0x7f5c434267e0) at NSAutoreleasePool.m:343
> #3  0x00007f5c42f5329a in -[NSAutoreleasePool release] (self=0xa302a0,
>     _cmd=0x604790) at NSAutoreleasePool.m:336
> #4  0x0000000000402178 in main (argc=2, argv=0x7fff4bb683c8)
>     at nssound_test.m:73
> 
> Let me know if you need all the other files that go along with this.

I did not run your test (You didn't provide a GNUmakefile and it seems
to require external headers, which is bad for a test), but from looking
at the code I notice that you are releasing "file", which is an already
autoreleased NSString. Perhaps it would be sufficient to just drop that
line.

Cheers,
Fred