Re: Occasional NSInternalInconsistencyException

The proper way to do this would be to bring up the panel in the applicationDidFinishLaunching: method in the NSApplication delegate.  This way the runloop is running and processing events.  I can't pinpoint in my mind the exact line of code, but I am reasonably certain that this should avoid your problem.

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On Tue, Nov 19, 2019 at 1:07 PM Ivan Vučica <address@hidden> wrote:

Would the bug here, then, be that alerts don't check for this edge case?

Patryk: I'd merge a pull request that makes -[NSAlert runModal] check
for an active runloop.

On Tue, Nov 19, 2019 at 5:49 PM Gregory Casamento
<address@hidden> wrote:
>
> Running modal panels requires the application run loop to be active. You're not doing that. I suggest you take a look at some of the application examples for how to do what you want here.
>
> On Tue, Nov 19, 2019, 10:34 AM Patryk Laurent <address@hidden> wrote:
>>
>>
>> > On Nov 18, 2019, at 09:16, Wolfgang Lux <address@hidden> wrote:
>> >
>> >> Am 18.11.2019 um 04:43 schrieb Patryk Laurent <address@hidden>:
>> >> “Uncaught exception NSInternalInconsistencyException, reason: registration with registered client.”
>> >
>> > The error message itself is coming from NSDistributedNotificationCenter and it looks like it's caused by a race condition when two threads in your program are adding an observer to the distribution notification center at about the same time.
>>
>> Thanks, Wolfgang. I find this surprising because my program is minimal (source code below). I wasn’t getting this before, will look for what has changed...
>>
>> Patryk
>>
>> #import <AppKit/AppKit.h>
>>
>> int main()
>> {
>> NSApplication *app;
>> app = [NSApplication sharedApplication];
>>
>> NSAlert * alert = [[NSAlert alloc] init];
>> [alert setMessageText:@"Hello alert"];
>> [alert addButtonWithTitle:@"All done"];
>> int result = [alert runModal];
>> if (result == NSAlertFirstButtonReturn) {
>> NSLog(@"First button pressed");
>> }
>> }
>>
>>
>>
>>
>>
>>

From:	Gregory Casamento
Subject:	Re: Occasional NSInternalInconsistencyException
Date:	Tue, 19 Nov 2019 17:25:49 -0500