Dumb Cuckoo outcome and Autorelease called without pool

Hello,

1) This is firstly the DumbCuckoo outcome.

Several weeks ago, I finally understood why my Cuckoo was dumb after 
every new installation of my Desktop: the clue is that you must set 
Alsamixer and store its config before building gnustep/libs-gui. If 
not, NSSound will not be able to read sounds until you set Alsa and 
you rebuild the gnustep/libs-gui.
Once I understood this, I got a working sound by setting always Alsa 
at the first stage. That was done.

2) The ununderstood Autorelease warning

And so I wanted to rework my little GNUstep testing app: TestCuckoo... 
It is also one of my numerous exercises to go on learning and practice 
GNUstep and Objective C.

It is working now, but there is still something I cannot understand 
and so I would not get bad habits creating apps with memory leaks 
issues.

When you run a GNUstep application: AutoreleasePool is self handled, 
is'nt it?
But when I execute some action, the console outputs this message:

> patrick@pi500:~/SOURCES/TestCuckoo $ openapp ./TestCuckoo.app
> 2026-02-22 18:32:37.214 TestCuckoo[497704:497704] Path:  
> /home/patrick/SOURCES/TestCuckoo/TestCuckoo.app/Resources/cuckoo.wav
> 2026-02-22 18:32:37.222 TestCuckoo[497704:497704] Playing sound...
> 2026-02-22 18:32:38.273 TestCuckoo[497704:497946] autorelease called 
> without pool for object (0x7fff8c01ea30) of class GSCInlineString in 
> thread <NSThread: 0x55560b2d1ce0>{name = (null), num = 497946}

The unexpected part begins from the keyword 'autorelease'.

Below, the code of the complete action method:

> - (void) testCuckoo: (id)sender
> {
>  NSString *soundPath = [[NSBundle mainBundle] 
> pathForResource:@"cuckoo" ofType:@"wav"];
>  NSLog(@"Path: %@", soundPath);
>  
>  NSSound *cuckoo;
>  cuckoo = [[NSSound alloc] initWithContentsOfFile:soundPath 
> byReference:NO];
>  if (!cuckoo) {
>     NSLog(@"Failed to load sound!");
>  } else {
>     [cuckoo play];
>     NSLog(@"Playing sound...");
>  }
> }

Facts:
- The sound is listened as expected just before the message "Playing 
sound..." is shown.
- Menu and button can run the action above.
- I did not added myself 'autorelease' explicit  statements.

So why this warning? What is lacking?
Where should I add explicit ones?

I joined also the complete project in the case the cause would be 
elsewhere in the code.
Context: Agnostep-Desktop with GNU runtime.
Libs-gui built from the branch: 'app-wrapper-open-url'.


<TestCuckoo.tar.gz>


Regards,
Patrick

-- 
Patrick Cardona - Pi500 - GNU/Linux aarch64 (Debian 13.3)
Xorg (1:7.7+24) - libcairo2 (1.18.4-1+rpt1 arm64) - Window Maker 
(0.96.0-4)
GWorkspace (1.1.0 - 02 2025) - Theme: AGNOSTEP - Classic - MUA: 
GNUMail (1.4.0 - rev.947)