NSLock bug?

[Larry Campbell]

This seems to be a bug, just wanted to know if maybe it's already fixed in a 
later distribution of either GNUstep or gcc.

This trivial program:

#import <Foundation/Foundation.h>

main()
{
  NSLock *theLock;
  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

  theLock = [[NSLock alloc] init];
  [theLock lock];
  [theLock unlock];     // crashes here
  [theLock release];

  [pool release];
}

Crashes when releasing the lock with:

Uncaught exception NSLockException, reason: invalid mutex

This is on Redhat Linux 2.2.12.  I'm using gcc version egcs-2.91.66 and GNUstep 
core libraries version 0.6.6.

I'm perfectly willing to believe I just need a new gcc or Linux but it would be 
nice to know exactly what I need before flailing around upgrading everything in 
sight.

Thanks!

- Larry