Qt Signal Slot Segmentation Fault

Signals and slots qt

gistfile1.txt
qt-creator-build $ ./bin/qtcreator -version
Qt Creator 4.6.82 based on Qt 5.6.2
# Open https://github.com/mirroring/dhcp/blob/v4_3/server/dhcpd.conf.5
# Then qtcreator crashed.
qt-creator-build $ gdb ./bin/qtcreator
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and 'show warranty' for details.
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Reading symbols from ./bin/qtcreator..done.
(gdb) run ~/tmp/dhcpd.conf.5
Starting program: /home/roy/src/qt-creator-build/bin/qtcreator ~/tmp/dhcpd.conf.5
[Thread debugging using libthread_db enabled]
Using host libthread_db library '/lib/x86_64-linux-gnu/libthread_db.so.1'.
[New Thread 0x7fffeb657700 (LWP 26681)]
[New Thread 0x7fffcc4d9700 (LWP 26690)]
[New Thread 0x7fffcbbd2700 (LWP 26691)]
[New Thread 0x7fffcb3d1700 (LWP 26692)]
[New Thread 0x7fffcabd0700 (LWP 26693)]
[New Thread 0x7fffc9797700 (LWP 26724)]
[New Thread 0x7fffb3ded700 (LWP 26745)]
[Thread 0x7fffb3ded700 (LWP 26745) exited]
Thread 1 'qtcreator' received signal SIGSEGV, Segmentation fault.
0x0000000000000018 in ?? ()
(gdb) bt
#0 0x0000000000000018 in ?? ()
#1 0x00007fffe2f08ff7 in TextEditor::Internal::Rule::progressFinished (this=0x27cca90) at ././././qt-creator/src/plugins/texteditor/generichighlighter/rule.cpp:184
#2 0x00007fffe2f0c19c in TextEditor::Internal::ProgressData::~ProgressData (this=0x2816200, __in_chrg=<optimized out>)
at ././././qt-creator/src/plugins/texteditor/generichighlighter/progressdata.cpp:44
#3 0x00007fffe2f12d61 in TextEditor::Highlighter::highlightBlock (this=0x2139920, text=..)
at ././././qt-creator/src/plugins/texteditor/generichighlighter/highlighter.cpp:231
#4 0x00007fffe2efe0e0 in TextEditor::SyntaxHighlighterPrivate::reformatBlock (this=0x21380f0, block=.., from=0, charsRemoved=0, charsAdded=130562)
at ././././qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:219
#5 0x00007fffe2efdf64 in TextEditor::SyntaxHighlighterPrivate::reformatBlocks (this=0x21380f0, from=0, charsRemoved=0, charsAdded=130562)
at ././././qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:198
#6 0x00007fffe2f004f6 in TextEditor::SyntaxHighlighterPrivate::rehighlight (this=0x21380f0, cursor=.., operation=QTextCursor::End)
at ././././qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:63
#7 0x00007fffe2efe84c in TextEditor::SyntaxHighlighter::rehighlight (this=0x2139920) at ././././qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:351
#8 0x00007fffe2e1fa3f in TextEditor::TextDocument::applyFontSettings (this=0x1031ad0) at ././././qt-creator/src/plugins/texteditor/textdocument.cpp:401
#9 0x00007fffe2e1f971 in TextEditor::TextDocument::triggerPendingUpdates (this=0x1031ad0) at ././././qt-creator/src/plugins/texteditor/textdocument.cpp:378
#10 0x00007fffe2e50b4c in TextEditor::TextEditorWidget::triggerPendingUpdates (this=0x21291a0) at ././././qt-creator/src/plugins/texteditor/texteditor.cpp:7242
#11 0x00007fffe2e50971 in TextEditor::TextEditorWidget::showEvent (this=0x21291a0, e=0x7fffffffba20) at ././././qt-creator/src/plugins/texteditor/texteditor.cpp:7208
#12 0x00007ffff71b34a8 in QWidget::event(QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#13 0x00007ffff72b4e9e in QFrame::event(QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#14 0x00007ffff733eb86 in QAbstractScrollArea::event(QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#15 0x00007ffff7366635 in QPlainTextEdit::event(QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#16 0x00007fffe2e349bf in TextEditor::TextEditorWidget::event (this=0x21291a0, e=0x7fffffffba20) at ././././qt-creator/src/plugins/texteditor/texteditor.cpp:2995
#17 0x00007ffff716ddcc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#18 0x00007ffff7173306 in QApplication::notify(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#19 0x00007ffff67f1048 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Core.so.5
#20 0x00007ffff71b01b3 in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#21 0x00007ffff71b0017 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#22 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#23 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#24 0x00007ffff71b0028 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#25 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#26 0x00007ffff71b0017 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#27 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#28 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#29 0x00007fffe3ab30a4 in Core::EditorManagerPlaceHolder::showEvent (this=0xcd1e00) at ././././qt-creator/src/plugins/coreplugin/editormanager/editormanager.cpp:156
#30 0x00007ffff71b34a8 in QWidget::event(QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#31 0x00007ffff716ddcc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#32 0x00007ffff7173306 in QApplication::notify(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#33 0x00007ffff67f1048 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Core.so.5
#34 0x00007ffff71b01b3 in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#35 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#36 0x00007ffff71b0028 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#37 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#38 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#39 0x00007ffff71b0028 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#40 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#41 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#42 0x00007ffff71b0028 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#43 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#44 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#45 0x00007ffff71b0028 in QWidgetPrivate::showChildren(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#46 0x00007ffff71b00af in QWidgetPrivate::show_helper() () from /opt/qt56/lib/libQt5Widgets.so.5
#47 0x00007ffff71b2ecd in QWidget::setVisible(bool) () from /opt/qt56/lib/libQt5Widgets.so.5
#48 0x00007ffff71946f5 in QStackedLayout::setCurrentIndex(int) () from /opt/qt56/lib/libQt5Widgets.so.5
#49 0x00007fffe3a84f2f in Core::Internal::FancyTabWidget::showWidget (this=0xac4ca0, index=1) at ././././qt-creator/src/plugins/coreplugin/fancytabwidget.cpp:574
#50 0x00007fffe3a87356 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<int>, void, void (Core::Internal::FancyTabWidget::*)(int)>::call (f=
(void (Core::Internal::FancyTabWidget::*)(Core::Internal::FancyTabWidget * const, int)) 0x7fffe3a84efa <Core::Internal::FancyTabWidget::showWidget(int)>, o=0xac4ca0,
arg=0x7fffffffc890) at /opt/qt56/include/QtCore/qobjectdefs_impl.h:501
#51 0x00007fffe3a871c5 in QtPrivate::FunctionPointer<void (Core::Internal::FancyTabWidget::*)(int)>::call<QtPrivate::List<int>, void> (f=
(void (Core::Internal::FancyTabWidget::*)(Core::Internal::FancyTabWidget * const, int)) 0x7fffe3a84efa <Core::Internal::FancyTabWidget::showWidget(int)>, o=0xac4ca0,
arg=0x7fffffffc890) at /opt/qt56/include/QtCore/qobjectdefs_impl.h:520
#52 0x00007fffe3a86ef8 in QtPrivate::QSlotObject<void (Core::Internal::FancyTabWidget::*)(int), QtPrivate::List<int>, void>::impl (which=1, this_=0x9901c0, r=0xac4ca0,
a=0x7fffffffc890, ret=0x0) at /opt/qt56/include/QtCore/qobject_impl.h:143
#53 0x00007ffff681d9c4 in QMetaObject::activate(QObject*, int, int, void**) () from /opt/qt56/lib/libQt5Core.so.5
#54 0x00007fffe3c91bf5 in Core::Internal::FancyTabBar::currentChanged (this=0xac4f60, _t1=1) at .moc/debug-shared/moc_fancytabwidget.cpp:252
#55 0x00007fffe3a83ef3 in Core::Internal::FancyTabBar::setCurrentIndex (this=0xac4f60, index=1) at ././././qt-creator/src/plugins/coreplugin/fancytabwidget.cpp:367
#56 0x00007fffe3a84ef6 in Core::Internal::FancyTabWidget::setCurrentIndex (this=0xac4ca0, index=1) at ././././qt-creator/src/plugins/coreplugin/fancytabwidget.cpp:568
---Type <return> to continue, or q <return> to quit---
#57 0x00007fffe3b509ed in Core::ModeManagerPrivate::activateModeHelper (this=0xb173f0, id=..) at ././././qt-creator/src/plugins/coreplugin/modemanager.cpp:158
#58 0x00007fffe3b5097a in Core::ModeManager::activateMode (id=..) at ././././qt-creator/src/plugins/coreplugin/modemanager.cpp:147
#59 0x00007fffe3abcd8f in Core::Internal::EditorManagerPrivate::activateEditor (view=0xa8e8e0, editor=0x2131750, flags=..)
at ././././qt-creator/src/plugins/coreplugin/editormanager/editormanager.cpp:1270
#60 0x00007fffe3ab9433 in Core::Internal::EditorManagerPrivate::openEditor (view=0xa8e8e0, fileName=.., editorId=.., flags=.., newEditor=0x0)
at ././././qt-creator/src/plugins/coreplugin/editormanager/editormanager.cpp:692
#61 0x00007fffe3ac501c in Core::EditorManager::openEditor (fileName=.., editorId=.., flags=.., newEditor=0x0)
at ././././qt-creator/src/plugins/coreplugin/editormanager/editormanager.cpp:2635
#62 0x00007fffe3a67d10 in Core::Internal::MainWindow::openFiles (this=0xa89a00, fileNames=..,
flags=(Core::ICore::SwitchMode | Core::ICore::CanContainLineAndColumnNumbers), workingDirectory=..) at ././././qt-creator/src/plugins/coreplugin/mainwindow.cpp:822
#63 0x00007fffe3b7b521 in Core::ICore::openFiles (arguments=.., flags=(Core::ICore::SwitchMode | Core::ICore::CanContainLineAndColumnNumbers))
at ././././qt-creator/src/plugins/coreplugin/icore.cpp:579
#64 0x00007fffe25a3a14 in ProjectExplorer::ProjectExplorerPluginPrivate::<lambda()>::operator()(void) const (__closure=0x1615020)
at ././././qt-creator/src/plugins/projectexplorer/projectexplorer.cpp:1997
#65 0x00007fffe25bb1e1 in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, ProjectExplorer::ProjectExplorerPluginPrivate::restoreSession()::<lambda()> >::call(ProjectExplorer::ProjectExplorerPluginPrivate::<lambda()> &, void **) (f=.., arg=0x7fffffffcf20) at /opt/qt56/include/QtCore/qobjectdefs_impl.h:495
#66 0x00007fffe25bac4e in QtPrivate::Functor<ProjectExplorer::ProjectExplorerPluginPrivate::restoreSession()::<lambda()>, 0>::call<QtPrivate::List<>, void>(ProjectExplorer::ProjectExplorerPluginPrivate::<lambda()> &, void *, void **) (f=.., arg=0x7fffffffcf20) at /opt/qt56/include/QtCore/qobjectdefs_impl.h:552
#67 0x00007fffe25b9a25 in QtPrivate::QFunctorSlotObject<ProjectExplorer::ProjectExplorerPluginPrivate::restoreSession()::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=1, this_=0x1615010, r=0x9b1570, a=0x7fffffffcf20, ret=0x0) at /opt/qt56/include/QtCore/qobject_impl.h:192
#68 0x00007ffff6829bf6 in ?? () from /opt/qt56/lib/libQt5Core.so.5
#69 0x00007ffff681e473 in QObject::event(QEvent*) () from /opt/qt56/lib/libQt5Core.so.5
#70 0x00007ffff716ddcc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#71 0x00007ffff7173306 in QApplication::notify(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Widgets.so.5
#72 0x00007ffff67f1048 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/qt56/lib/libQt5Core.so.5
#73 0x00007ffff684521e in QTimerInfoList::activateTimers() () from /opt/qt56/lib/libQt5Core.so.5
#74 0x00007ffff6845751 in ?? () from /opt/qt56/lib/libQt5Core.so.5
#75 0x00007ffff50e2197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007ffff50e23f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007ffff50e249c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#78 0x00007ffff684632f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt56/lib/libQt5Core.so.5
#79 0x00007ffff67eed9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/qt56/lib/libQt5Core.so.5
#80 0x00007ffff67f745c in QCoreApplication::exec() () from /opt/qt56/lib/libQt5Core.so.5
#81 0x0000000000410ed6 in main (argc=2, argv=0x7fffffffdc88) at ./././qt-creator/src/app/main.cpp:546
(gdb) quit
A debugging session is active.
Inferior 1 [process 26677] will be killed.
Quit anyway? (y or n) y

Qt Signal Slot Connect

Fault

Qt Signal Slot Segmentation Fault Definition

Gambling casinos near orlando florida. Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. Qt's signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal's parameters at the right time. Signals and slots can take any number of arguments of any type. GDB调试的时候出现了: Program received signal SIGSEGV, Segmentation fault.(程序收到信号SIGSEGV,分段故障) SIGSEGV:在POSIX兼容的平台上,SIGSEGV是当一个进程执行了一个无效的内存引用,或发生段错误时发送给它的信号。SIGSEGV的符号常量在头文件signal.h中定义。.

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