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
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