https://bugs.kde.org/show_bug.cgi?id=368847
Bug ID: 368847 Summary: Kwin crashes when I switch between virtual desktops using the Desktop Grid effect Product: kwin Version: 5.7.5 Platform: Ubuntu Packages OS: Linux Status: UNCONFIRMED Keywords: drkonqi Severity: crash Priority: NOR Component: general Assignee: kwin-bugs-n...@kde.org Reporter: aureo.fet...@gmail.com Application: kwin_x11 (5.7.5) Qt Version: 5.7.0 Frameworks Version: 5.26.0 Operating System: Linux 4.4.0-36-generic x86_64 Distribution: KDE neon User Edition 5.7 -- Information about the crash: - What I was doing when the application crashed: Kwin crashes when I switch between virtual desktops using the Desktop Grid effect, the Desktop Grid effect has been activated using the corners of the screen. The crash can be reproduced sometimes. -- Backtrace: Application: KWin (kwin_x11), signal: Aborted Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7faf3716b940 (LWP 1889))] Thread 6 (Thread 0x7faf17fff700 (LWP 2130)): #0 0x00007faf36c64e8d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007faf34b626da in poll (__timeout=<optimized out>, __nfds=1, __fds=0x7faf0c01cb08) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46 #2 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7faf0c01cb08) at kernel/qcore_unix.cpp:93 #3 qt_safe_poll (fds=0x7faf0c01cb08, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:112 #4 0x00007faf34b63fb8 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:495 #5 0x00007faf34b11d9a in QEventLoop::exec (this=this@entry=0x7faf17ffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #6 0x00007faf34937044 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507 #7 0x00007faf2f3f4685 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #8 0x00007faf3493bc28 in QThreadPrivate::start (arg=0x2f05a20) at thread/qthread_unix.cpp:344 #9 0x00007faf3028f6fa in start_thread (arg=0x7faf17fff700) at pthread_create.c:333 #10 0x00007faf36c70b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 5 (Thread 0x7faf149e8700 (LWP 2021)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007faf33cd55c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 #2 0x00007faf33cd5609 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 #3 0x00007faf3028f6fa in start_thread (arg=0x7faf149e8700) at pthread_create.c:333 #4 0x00007faf36c70b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 4 (Thread 0x7faf175a4700 (LWP 2005)): #0 0x00007faf36c64e8d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007faf34b626da in poll (__timeout=<optimized out>, __nfds=1, __fds=0x7faf04000ac8) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46 #2 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7faf04000ac8) at kernel/qcore_unix.cpp:93 #3 qt_safe_poll (fds=0x7faf04000ac8, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:112 #4 0x00007faf34b63fb8 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:495 #5 0x00007faf34b11d9a in QEventLoop::exec (this=this@entry=0x7faf175a3c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #6 0x00007faf34937044 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507 #7 0x00007faf2f3f4685 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #8 0x00007faf3493bc28 in QThreadPrivate::start (arg=0x248f510) at thread/qthread_unix.cpp:344 #9 0x00007faf3028f6fa in start_thread (arg=0x7faf175a4700) at pthread_create.c:333 #10 0x00007faf36c70b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 3 (Thread 0x7faf1dca2700 (LWP 1961)): #0 0x00007faf36c64e8d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007faf34b626da in poll (__timeout=<optimized out>, __nfds=1, __fds=0x7faf1000b418) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46 #2 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7faf1000b418) at kernel/qcore_unix.cpp:93 #3 qt_safe_poll (fds=0x7faf1000b418, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:112 #4 0x00007faf34b63fb8 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:495 #5 0x00007faf34b11d9a in QEventLoop::exec (this=this@entry=0x7faf1dca1c50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #6 0x00007faf34937044 in QThread::exec (this=this@entry=0x7faf37301d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507 #7 0x00007faf3728d7a5 in QDBusConnectionManager::run (this=0x7faf37301d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196 #8 0x00007faf3493bc28 in QThreadPrivate::start (arg=0x7faf37301d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344 #9 0x00007faf3028f6fa in start_thread (arg=0x7faf1dca2700) at pthread_create.c:333 #10 0x00007faf36c70b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 2 (Thread 0x7faf1f7ad700 (LWP 1960)): #0 0x00007faf36c64e8d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007faf35de9c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007faf35deb8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007faf20257a39 in QXcbEventReader::run (this=0x23361b0) at qxcbconnection.cpp:1337 #4 0x00007faf3493bc28 in QThreadPrivate::start (arg=0x23361b0) at thread/qthread_unix.cpp:344 #5 0x00007faf3028f6fa in start_thread (arg=0x7faf1f7ad700) at pthread_create.c:333 #6 0x00007faf36c70b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 1 (Thread 0x7faf3716b940 (LWP 1889)): [KCrash Handler] #6 0x00007faf36b9f418 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 #7 0x00007faf36ba101a in __GI_abort () at abort.c:89 #8 0x00007faf34922811 in qt_message_fatal (context=..., message=<synthetic pointer>) at global/qlogging.cpp:1680 #9 QMessageLogger::fatal (this=this@entry=0x7fffa8d72640, msg=msg@entry=0x7faf342fe840 "Splitting quads is allowed only in pre-paint calls!") at global/qlogging.cpp:793 #10 0x00007faf342ecca9 in KWin::WindowQuad::makeSubQuad (this=this@entry=0x3517d50, x1=x1@entry=-193.17436670051535, y1=y1@entry=454.49489954481885, x2=x2@entry=-141.26847411581122, y2=y2@entry=487) at /workspace/build/libkwineffects/kwineffects.cpp:949 #11 0x00007faf3681c6e9 in KWin::SceneOpenGL::Window::beginRenderWindow (this=<optimized out>, mask=<optimized out>, region=..., data=...) at /workspace/build/scene_opengl.cpp:1319 #12 0x00007faf3681cd97 in KWin::SceneOpenGL2Window::performPaint (this=this@entry=0x2de0d90, mask=mask@entry=118, region=..., data=...) at /workspace/build/scene_opengl.cpp:1513 #13 0x00007faf36822cb2 in KWin::SceneOpenGL2::performPaintWindow (this=this@entry=0x26b6830, w=w@entry=0x2fb6480, mask=<optimized out>, mask@entry=118, region=..., data=...) at /workspace/build/scene_opengl.cpp:1141 #14 0x00007faf36822ea8 in KWin::SceneOpenGL2::finalDrawWindow (this=0x26b6830, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/scene_opengl.cpp:1127 #15 0x00007faf36830269 in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:509 #16 0x00007faf342e93b1 in KWin::Effect::drawWindow (this=this@entry=0x2bf4dd0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:619 #17 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #18 0x00007faf33e89ebe in KWin::ContrastEffect::drawWindow (this=this@entry=0x2c2afb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects/backgroundcontrast/contrast.cpp:402 #19 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #20 0x00007faf33e0985d in KWin::BlurEffect::drawWindow (this=this@entry=0x27143b0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects/blur/blur.cpp:473 #21 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #22 0x00007faf342e93b1 in KWin::Effect::drawWindow (this=this@entry=0x2d235b0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:619 #23 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #24 0x00007faf342e93b1 in KWin::Effect::drawWindow (this=this@entry=0x2d36ba0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:619 #25 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #26 0x00007faf342e93b1 in KWin::Effect::drawWindow (this=this@entry=0x2d21be0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:619 #27 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #28 0x00007faf342e93b1 in KWin::Effect::drawWindow (this=this@entry=0x2cf8730, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:619 #29 0x00007faf368301fe in KWin::EffectsHandlerImpl::drawWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:506 #30 0x00007faf36800dd1 in KWin::Scene::finalPaintWindow (this=<optimized out>, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/scene.cpp:607 #31 0x00007faf368300aa in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:472 #32 0x00007faf342e9251 in KWin::Effect::paintWindow (this=this@entry=0x2bf4dd0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:589 #33 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #34 0x00007faf342e9251 in KWin::Effect::paintWindow (this=this@entry=0x2c2afb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:589 #35 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #36 0x00007faf342e9251 in KWin::Effect::paintWindow (this=this@entry=0x27143b0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:589 #37 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #38 0x00007faf33e73f3a in KWin::FallApartEffect::paintWindow (this=this@entry=0x2d235b0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects/fallapart/fallapart.cpp:120 #39 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #40 0x00007faf342f5d29 in KWin::AnimationEffect::paintWindow (this=this@entry=0x2d36ba0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/libkwineffects/kwinanimationeffect.cpp:644 #41 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #42 0x00007faf33e2c1bd in KWin::DesktopGridEffect::paintWindow (this=this@entry=0x2d21be0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects/desktopgrid/desktopgrid.cpp:360 #43 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #44 0x00007faf33e2f8a8 in KWin::DimInactiveEffect::paintWindow (this=this@entry=0x2cf8730, w=w@entry=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects/diminactive/diminactive.cpp:81 #45 0x00007faf3683004e in KWin::EffectsHandlerImpl::paintWindow (this=0x270dfb0, w=0x2fb6480, mask=mask@entry=118, region=..., data=...) at /workspace/build/effects.cpp:469 #46 0x00007faf3680768d in KWin::Scene::paintWindow (this=this@entry=0x26b6830, w=0x2de0d90, mask=118, region=..., quads=...) at /workspace/build/scene.cpp:479 #47 0x00007faf36802d36 in KWin::Scene::paintGenericScreen (this=this@entry=0x26b6830, orig_mask=orig_mask@entry=112) at /workspace/build/scene.cpp:243 #48 0x00007faf36822ba7 in KWin::SceneOpenGL2::paintGenericScreen (this=this@entry=0x26b6830, mask=mask@entry=112, data=...) at /workspace/build/scene_opengl.cpp:1087 #49 0x00007faf36806bcd in KWin::Scene::finalPaintScreen (this=0x26b6830, mask=mask@entry=112, region=..., data=...) at /workspace/build/scene.cpp:199 #50 0x00007faf3682fe2f in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:429 #51 0x00007faf33e77c5c in KWin::ScreenEdgeEffect::paintScreen (this=this@entry=0x2bf4dd0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects/screenedge/screenedgeeffect.cpp:88 #52 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:426 #53 0x00007faf342e919f in KWin::Effect::paintScreen (this=this@entry=0x2c2afb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:574 #54 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:426 #55 0x00007faf342e919f in KWin::Effect::paintScreen (this=this@entry=0x27143b0, mask=mask@entry=112, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:574 #56 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:426 #57 0x00007faf342e919f in KWin::Effect::paintScreen (this=this@entry=0x2d235b0, mask=mask@entry=112, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:574 #58 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:426 #59 0x00007faf342e919f in KWin::Effect::paintScreen (this=this@entry=0x2d36ba0, mask=mask@entry=112, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:574 #60 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:426 #61 0x00007faf33e2ae07 in KWin::DesktopGridEffect::paintScreen (this=this@entry=0x2d21be0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects/desktopgrid/desktopgrid.cpp:161 #62 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=mask@entry=112, region=..., data=...) at /workspace/build/effects.cpp:426 #63 0x00007faf342e919f in KWin::Effect::paintScreen (this=this@entry=0x2cf8730, mask=mask@entry=112, region=..., data=...) at /workspace/build/libkwineffects/kwineffects.cpp:574 #64 0x00007faf3682fdda in KWin::EffectsHandlerImpl::paintScreen (this=0x270dfb0, mask=112, region=..., data=...) at /workspace/build/effects.cpp:426 #65 0x00007faf36806839 in KWin::Scene::paintScreen (this=this@entry=0x26b6830, mask=mask@entry=0x7fffa8d747d0, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fffa8d747a0, validRegion=validRegion@entry=0x7fffa8d747b0, projection=...) at /workspace/build/scene.cpp:151 #66 0x00007faf3681e7c6 in KWin::SceneOpenGL::paint (this=0x26b6830, damage=..., toplevels=...) at /workspace/build/scene_opengl.cpp:731 #67 0x00007faf367f8ff2 in KWin::Compositor::performCompositing (this=0x240c160) at /workspace/build/composite.cpp:720 #68 0x00007faf34b3fa93 in QObject::event (this=0x240c160, e=<optimized out>) at kernel/qobject.cpp:1285 #69 0x00007faf353ff89c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x240c160, e=0x7fffa8d74c20) at kernel/qapplication.cpp:3799 #70 0x00007faf35407296 in QApplication::notify (this=0x7fffa8d74ef0, receiver=0x240c160, e=0x7fffa8d74c20) at kernel/qapplication.cpp:3556 #71 0x00007faf34b13da8 in QCoreApplication::notifyInternal2 (receiver=0x240c160, event=event@entry=0x7fffa8d74c20) at kernel/qcoreapplication.cpp:988 #72 0x00007faf34b6623e in QCoreApplication::sendEvent (event=0x7fffa8d74c20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231 #73 QTimerInfoList::activateTimers (this=this@entry=0x23745c0) at kernel/qtimerinfo_unix.cpp:644 #74 0x00007faf34b6303c in QEventDispatcherUNIXPrivate::activateTimers (this=this@entry=0x2374520) at kernel/qeventdispatcher_unix.cpp:249 #75 0x00007faf34b64218 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=..., flags@entry=...) at kernel/qeventdispatcher_unix.cpp:509 #76 0x00007faf202cf87d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:68 #77 0x00007faf34b11d9a in QEventLoop::exec (this=this@entry=0x7fffa8d74de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #78 0x00007faf34b1a3ac in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261 #79 0x00007faf34e5cdbc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1639 #80 0x00007faf353ff7f5 in QApplication::exec () at kernel/qapplication.cpp:2975 #81 0x00007faf36f3c206 in kdemain (argc=1, argv=0x7fffa8d75078) at /workspace/build/main_x11.cpp:466 #82 0x00007faf36b8a830 in __libc_start_main (main=0x400710 <main(int, char**)>, argc=3, argv=0x7fffa8d75078, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa8d75068) at ../csu/libc-start.c:291 #83 0x0000000000400749 in _start () Possible duplicates by query: bug 364721, bug 364342, bug 362567, bug 355457, bug 355096. 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