Please open bug report on https://bugreports.qt.io/

On 2/19/20 6:17 PM, j...@wavemetrics.com wrote:
> I still see it after a couple of Qt Creator updates. My colleague here is 
> using a pretty old version of Creator because of this problem. So it seems 
> like something Creator is doing. Googling _os_unfair_lock_recursive_abort or 
> _os_unfair_lock_lock_slow doesn't yield much, except for bug reports on other 
> applications.
> 
> -John Weeks
> 
> 
>> On Feb 19, 2020, at 8:31 AM, Nils Jeisecke <nils.jeise...@saltation.com> 
>> wrote:
>>
>> Hi list,
>>
>> I'm seeing the same thing here. Not sure when troubles started.
>> Nobody else having problems with that?
>>
>> Nils
>>
>> Am 19.08.2019 um 11:37 hat John Weeks geschrieben:
>>> On Macintosh OS X 10.14.5, Qt 5.12.5, and Qt Creator 4.9.2 I keep getting a 
>>> crash while stepping through code. I get a stack trace that looks something 
>>> like this:
>>>
>>> 1   _os_unfair_lock_recursive_abort                                         
>>>                                                                             
>>>             (x86_64) /usr/lib/system/libsystem_platform.dylib      
>>> 0x7fff64dac1c2
>>> 2   _os_unfair_lock_lock_slow                                               
>>>                                                                             
>>>             (x86_64) /usr/lib/system/libsystem_platform.dylib      
>>> 0x7fff64da8caa
>>> 3   look_up_class                                                           
>>>                                                                             
>>>             (x86_64h) /usr/lib/libobjc.A.dylib                     
>>> 0x7fff633e6774
>>> 4   QMacAutoReleasePool::QMacAutoReleasePool()                              
>>>                                                                             
>>>             qcore_mac_objc.mm                                 169  
>>> 0x111cd1dc5
>>> 5   QMacAutoReleasePool::QMacAutoReleasePool()                              
>>>                                                                             
>>>             qcore_mac_objc.mm                                 140  
>>> 0x111cd1ec5
>>> 6   QMacStyle::styleHint(QStyle::StyleHint, QStyleOption const *, QWidget 
>>> const *, QStyleHintReturn *) const                                          
>>>               qmacstyle_mac.mm                                  2602 
>>> 0x11c53c5e2
>>> 7   QProxyStyle::styleHint(QStyle::StyleHint, QStyleOption const *, QWidget 
>>> const *, QStyleHintReturn *) const                                          
>>>             qproxystyle.cpp                                   290  
>>> 0x10f7adea6
>>> 8   IgorProxyStyle::styleHint(QStyle::StyleHint, QStyleOption const *, 
>>> QWidget const *, QStyleHintReturn *) const                                  
>>>                  IgorProxyStyle.cpp                                250  
>>> 0x1002c2191
>>> 9   QFocusFrame::setWidget(QWidget *)                                       
>>>                                                                             
>>>             qfocusframe.cpp                                   187  
>>> 0x10f830bba
>>> 10  QMacStyle::event(QEvent *)                                              
>>>                                                                             
>>>             qmacstyle_mac.mm                                  6517 
>>> 0x11c55e379
>>> <...... Lots of other stuff removed here .......>
>>>
>>> Plain debug build, turned on the checkbox for loading the debug Qt 
>>> frameworks. The styleHint and AutoReleasePool stuff seems to be a constant 
>>> part of the problem.
>>>
>>> That bit at line 2 about "slow" suggests that OS X got tired of waiting for 
>>> my stepping through the code and decided to abort. This makes it really 
>>> hard to debug certain parts of the code. Is this anything that y'all have 
>>> seen? Is there a solution? Do I just have to use QDebug() statements 
>>> liberally sprinkled about my code to debug?
>>>
>>> Any insight greatly appreciated.
>>>
>>> -John Weeks
>>>
>>> _______________________________________________
>>> Interest mailing list
>>> Interest@qt-project.org
>>> https://lists.qt-project.org/listinfo/interest
> 
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