Bug 106049 – [Qt][WK2]REGRESSION(r138729): It made plugins/change-widget-and-click-crash.html crash

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: New Bugs

[Csaba Osztrogonác]

crash log for WebProcess (pid <unknown>):
STDOUT: <empty>
STDERR: 1   0x7fa2918c0638 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x19e7638) [0x7fa2918c0638]
STDERR: 2   0x7fa28ea3b420 /lib/x86_64-linux-gnu/libc.so.6(+0x36420) [0x7fa28ea3b420]
STDERR: 3   0x7fa290500a3b /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x627a3b) [0x7fa290500a3b]
STDERR: 4   0x7fa2904b0958 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x5d7958) [0x7fa2904b0958]
STDERR: 5   0x7fa2908ee734 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0xa15734) [0x7fa2908ee734]
STDERR: 6   0x7fa29077b5c3 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x8a25c3) [0x7fa29077b5c3]
STDERR: 7   0x7fa29078b39a /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x8b239a) [0x7fa29078b39a]
STDERR: 8   0x7fa29077a0e2 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x8a10e2) [0x7fa29077a0e2]
STDERR: 9   0x7fa290798141 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x8bf141) [0x7fa290798141]
STDERR: 10  0x7fa290b1ec6d /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0xc45c6d) [0x7fa290b1ec6d]
STDERR: 11  0x7fa290b22a47 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0xc49a47) [0x7fa290b22a47]
STDERR: 12  0x7fa2904f0edb /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x617edb) [0x7fa2904f0edb]
STDERR: 13  0x7fa2904f107e /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x61807e) [0x7fa2904f107e]
STDERR: 14  0x7fa290543bba /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x66abba) [0x7fa290543bba]
STDERR: 15  0x7fa2903a34dc /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x4ca4dc) [0x7fa2903a34dc]
STDERR: 16  0x7fa29039fa4a /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x4c6a4a) [0x7fa29039fa4a]
STDERR: 17  0x7fa29039fbcb /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x4c6bcb) [0x7fa29039fbcb]
STDERR: 18  0x7fa2903a0bc8 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x4c7bc8) [0x7fa2903a0bc8]
STDERR: 19  0x7fa2903a0cac /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x4c7cac) [0x7fa2903a0cac]
STDERR: 20  0x7fa2903a2c79 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x4c9c79) [0x7fa2903a2c79]
STDERR: 21  0x7fa29048a29d /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x5b129d) [0x7fa29048a29d]
STDERR: 22  0x7fa29047e608 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(WKBundlePostSynchronousMessage+0x38) [0x7fa29047e608]
STDERR: 23  0x7fa2412f6949 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libWTRInjectedBundle.so(_ZN3WTR22EventSendingController9mouseDownEiPK13OpaqueJSValue+0x79) [0x7fa2412f6949]
STDERR: 24  0x7fa2413017b8 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libWTRInjectedBundle.so(_ZN3WTR24JSEventSendingController9mouseDownEPK15OpaqueJSContextP13OpaqueJSValueS5_mPKPKS4_PS7_+0x58) [0x7fa2413017b8]
STDERR: 25  0x7fa2915acb26 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x16d3b26) [0x7fa2915acb26]
STDERR: 26  0x7fa2917569de /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x187d9de) [0x7fa2917569de]
STDERR: 27  0x7fa2917640a7 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x188b0a7) [0x7fa2917640a7]
STDERR: 28  0x7fa29176a334 /home/webkitbuildbot/slaves/release64bitWebKit2_EC2/buildslave/qt-linux-64-release-webkit2/build/WebKitBuild/Release/lib/libQt5WebKit.so.5(+0x1891334) [0x7fa29176a334]

[Csaba Osztrogonác]

I skipped it to paint the bots green - r138751. Please unskip it with the proper fix.

[Ryosuke Niwa]

Also see the bug 106042.

[Jon Lee]

Can't tell from the provided stacktrace, but my guess is it's a dupe of 106042. Patch is forthcoming.

[Csaba Osztrogonác]

The bug is still valid. Here is a debug crash log with symbols:

crash log for WebKitTestRunner (pid 7293):
STDOUT: <empty>
STDERR: ASSERTION FAILED: lines.size() == 3
STDERR: /home/oszi/WebKit/Source/WebKit2/UIProcess/Plugins/qt/PluginProcessProxyQt.cpp(211) : static bool WebKit::PluginProcessProxy::scanPlugin(const WTF::String&, WebKit::RawPluginMetaData&)
STDERR: 1   0x7f827a3cd491 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::PluginProcessProxy::scanPlugin(WTF::String const&, WebKit::RawPluginMetaData&)+0x4a1) [0x7f827a3cd491]
STDERR: 2   0x7f827a2f6738 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::NetscapePluginModule::getPluginInfo(WTF::String const&, WebKit::PluginModuleInfo&)+0x30) [0x7f827a2f6738]
STDERR: 3   0x7f827a3cf1fb /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::PluginInfoStore::getPluginInfo(WTF::String const&, WebKit::PluginModuleInfo&)+0x23) [0x7f827a3cf1fb]
STDERR: 4   0x7f827a3b35d5 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::PluginInfoStore::loadPlugin(WTF::Vector<WebKit::PluginModuleInfo, 0ul>&, WTF::String const&)+0x2f) [0x7f827a3b35d5]
STDERR: 5   0x7f827a3b3500 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::PluginInfoStore::loadPluginsIfNecessary()+0x288) [0x7f827a3b3500]
STDERR: 6   0x7f827a3b364b /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::PluginInfoStore::plugins()+0x33) [0x7f827a3b364b]
STDERR: 7   0x7f827a45f79f /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WebKit::WebProcessProxy::handleGetPlugins(unsigned long, bool)+0xcb) [0x7f827a45f79f]
STDERR: 8   0x7f827a46a926 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WTF::FunctionWrapper<void (WebKit::WebProcessProxy::*)(unsigned long, bool)>::operator()(WebKit::WebProcessProxy*, unsigned long, bool)+0x6e) [0x7f827a46a926]
STDERR: 9   0x7f827a46a73c /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WTF::BoundFunctionImpl<WTF::FunctionWrapper<void (WebKit::WebProcessProxy::*)(unsigned long, bool)>, void ()(WebKit::WebProcessProxy*, unsigned long, bool)>::operator()()+0x62) [0x7f827a46a73c]
STDERR: 10  0x7f827a3829e4 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WTF::Function<void ()()>::operator()() const+0x72) [0x7f827a3829e4]
STDERR: 11  0x7f827a5df5e8 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WorkQueue::WorkItemQt::execute()+0x2c) [0x7f827a5df5e8]
STDERR: 12  0x7f827a5df602 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(WorkQueue::WorkItemQt::executeAndDelete()+0x18) [0x7f827a5df602]
STDERR: 13  0x7f827a5dfd92 /home/oszi/WebKit/WebKitBuild/Debug/lib/libWebKit2.so.1(+0x9dbd92) [0x7f827a5dfd92]
STDERR: 14  0x7f826bd5770e /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(QObject::event(QEvent*)+0x36e) [0x7f826bd5770e]
STDERR: 15  0x7f826d79d8cc /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Widgets.so.5(QApplicationPrivate::notify_helper(QObject*, QEvent*)+0xac) [0x7f826d79d8cc]
STDERR: 16  0x7f826d7a3beb /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Widgets.so.5(QApplication::notify(QObject*, QEvent*)+0x11b) [0x7f826d7a3beb]
STDERR: 17  0x7f826bd32c04 /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(QCoreApplication::notifyInternal(QObject*, QEvent*)+0x84) [0x7f826bd32c04]
STDERR: 18  0x7f826bd37829 /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)+0x279) [0x7f826bd37829]
STDERR: 19  0x7f826bd7ed43 /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(+0x27cd43) [0x7f826bd7ed43]
STDERR: 20  0x7f826f8656f2 /lib/libglib-2.0.so.0(g_main_context_dispatch+0x1f2) [0x7f826f8656f2]
STDERR: 21  0x7f826f869568 /lib/libglib-2.0.so.0(+0x42568) [0x7f826f869568]
STDERR: 22  0x7f826f86971c /lib/libglib-2.0.so.0(g_main_context_iteration+0x6c) [0x7f826f86971c]
STDERR: 23  0x7f826bd7e81b /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+0x6b) [0x7f826bd7e81b]
STDERR: 24  0x7f826bd31e4b /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)+0x11b) [0x7f826bd31e4b]
STDERR: 25  0x7f826bb917ea /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(QThread::exec()+0x9a) [0x7f826bb917ea]
STDERR: 26  0x7f826bb969a9 /usr/local/Trolltech/Qt5/Qt-5.0.0-r40/lib/libQt5Core.so.5(+0x949a9) [0x7f826bb969a9]
STDERR: 27  0x7f826b66b8ca /lib/libpthread.so.0(+0x68ca) [0x7f826b66b8ca]
STDERR: 28  0x7f826aa14b6d /lib/libc.so.6(clone+0x6d) [0x7f826aa14b6d]

[Csaba Osztrogonác]

Hmmm ... my last backtrace could be invalid, because all plugin tests crash in debug mode ...

[Balazs Kelemen]

(In reply to comment #5)
> Hmmm ... my last backtrace could be invalid, because all plugin tests crash in debug mode ...

Hmm, once again this assert ... that's why I believe we should have a debug bot visible in the official waterfall (and I should not write too fragile code). Anyway I will look at the assert at least on Monday, I guess it is not related to the patch referred in the title.

[Csaba Osztrogonác]

(In reply to comment #6)
> (In reply to comment #5)
> > Hmmm ... my last backtrace could be invalid, because all plugin tests crash in debug mode ...
> 
> Hmm, once again this assert ... that's why I believe we should have a debug bot visible in the official waterfall (and I should not write too fragile code). Anyway I will look at the assert at least on Monday, I guess it is not related to the patch referred in the title.

We don't have free hardware resource to add one more debug bot. :(

[Csaba Osztrogonác]

It passes in release mode, so I unskipped it - https://trac.webkit.org/changeset/138807.

*** This bug has been marked as a duplicate of bug 106042 ***

[Balazs Kelemen]

Here is the fix for the assert: https://bugs.webkit.org/show_bug.cgi?id=106659, I guess it is trivial enough to be landed without an owner's review (but it's up to you to decide).