[Impact]
This bug affects QuiteRSS and other Qt applications, like plasma-discover (see https://bugs.kde.org/show_bug.cgi?id=402848) and qbittorrent (see bug 1814375). All they crash with similar stack traces.
[Test Case]
1. Open QuiteRSS.
2. Leave it running for several hours.
3. It should not crash.
[Proposed Fix]
The proposed fix is a backport of the following commit from upstream 5.12 branch: https://code.qt.io/cgit/qt/qtbase.git/commit/?id=e431a3ac027915db
[Regression Potential]
This patch adds an additional check before re-sending the request. Regressions chance is minimal, but the potential regressions may be that the request is not re-sent where it was re-sent with the previous code.
[Original Description]
After opening QuiteRSS it will run until crash happens. This happens intermittently within the hour usually.
(gdb) bt
#0 QHttpNetworkConnectionChannel::sendRequest (this=<optimized out>)
at access/qhttpnetworkconnectionchannel.cpp:238
#1 0x00007ffff30deca2 in QHttpNetworkConnectionPrivate::_q_startNextRequest (
this=0x7fff480d4a20) at access/qhttpnetworkconnection.cpp:1015
#2 0x00007ffff2736122 in QObject::event (this=0x7fff48da89b0,
e=<optimized out>) at kernel/qobject.cpp:1247
#3 0x00007ffff6f2482c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#4 0x00007ffff6f2c0f4 in QApplication::notify(QObject*, QEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5 0x00007ffff27069a8 in QCoreApplication::notifyInternal2 (
receiver=0x7fff48da89b0, event=event@entry=0x7fff494233b0)
at kernel/qcoreapplication.cpp:1024
#6 0x00007ffff270911d in QCoreApplication::sendEvent (event=0x7fff494233b0,
receiver=<optimized out>)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#7 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0,
event_type=event_type@entry=0, data=0x7fff60008e90)
at kernel/qcoreapplication.cpp:1699
#8 0x00007ffff27096a8 in QCoreApplication::sendPostedEvents (
receiver=receiver@entry=0x0, event_type=event_type@entry=0)
at kernel/qcoreapplication.cpp:1553
#9 0x00007ffff27602c3 in postEventSourceDispatch (s=0x7fff48003f10)
at kernel/qeventdispatcher_glib.cpp:276
#10 0x00007fffece96317 in g_main_context_dispatch ()
from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fffece96550 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007fffece965dc in g_main_context_iteration ()
from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007ffff275f8ef in QEventDispatcherGlib::processEvents (
this=0x7fff48000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#14 0x00007ffff27049ea in QEventLoop::exec (this=this@entry=0x7fff4fffec60,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#15 0x00007ffff252322a in QThread::exec (this=<optimized out>)
at thread/qthread.cpp:515
#16 0x00007ffff252816d in QThreadPrivate::start (arg=0x7fff60008a20)
at thread/qthread_unix.cpp:368
#17 0x00007ffff22646db in start_thread (arg=0x7fff4ffff700)
at pthread_create.c:463
#18 0x00007ffff19ec88f in clone ()
at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Status changed to 'Confirmed' because the bug affects multiple users.