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Improve dictionary finding in Linux#5

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vadi2 merged 2 commits intoMudlet:developmentfrom
vadi2:development
Jan 8, 2014
Merged

Improve dictionary finding in Linux#5
vadi2 merged 2 commits intoMudlet:developmentfrom
vadi2:development

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@vadi2 vadi2 commented Jan 8, 2014

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vadi2 added a commit that referenced this pull request Jan 8, 2014
Improve dictionary finding in Linux
@vadi2 vadi2 merged commit 232cc20 into Mudlet:development Jan 8, 2014
@vadi2 vadi2 mentioned this pull request Mar 31, 2017
vadi2 referenced this pull request in vadi2/Mudlet Apr 4, 2017
Another missing Geyser function
vadi2 referenced this pull request in vadi2/Mudlet Apr 4, 2017
@Nyyrazzilyss Nyyrazzilyss mentioned this pull request Nov 20, 2021
mehulmathur16 pushed a commit to mehulmathur16/Mudlet that referenced this pull request Feb 16, 2024
vadi2 added a commit that referenced this pull request Dec 14, 2024
<!-- Keep the title short & concise so anyone non-technical can
understand it,
     the title appears in PTB changelogs -->
#### Brief overview of PR changes/additions
Fixes Mudlet crash with IRC open when closing a profile
#### Motivation for adding to Mudlet
Mudlet should never crash
#### Other info (issues closed, discussion etc)
Closes #7293. I'll fix other
cases of `Host* mpHost;` after this PR so we have consistency in the
codebase.

Running the provided test case through
[AddressSanitizer](https://wiki.mudlet.org/w/Compiling_Mudlet#Checking_memory_leaks_.26_other_issues_.28sanitizers.29_3)
revealed that mpHost was being used after it was deleted:

```
=================================================================
==17843==ERROR: AddressSanitizer: heap-use-after-free on address 0x623000025e58 at pc 0x5555560abe75 bp 0x7fffffff7460 sp 0x7fffffff7450
READ of size 8 at 0x623000025e58 thread T0
    #0 0x5555560abe74 in QWeakPointer<QObject>::internalData() const /usr/include/x86_64-linux-gnu/qt6/QtCore/qsharedpointer_impl.h:711
    #1 0x5555562c15ad in QPointer<dlgIRC>::data() const /usr/include/x86_64-linux-gnu/qt6/QtCore/qpointer.h:77
    #2 0x5555562bd715 in QPointer<dlgIRC>::operator dlgIRC*() const /usr/include/x86_64-linux-gnu/qt6/QtCore/qpointer.h:85
    #3 0x555556296c13 in dlgIRC::~dlgIRC() /home/vadi/Programs/Mudlet/src/dlgIRC.cpp:109
    #4 0x555556296e1f in dlgIRC::~dlgIRC() /home/vadi/Programs/Mudlet/src/dlgIRC.cpp:112
    #5 0x7ffff6ba04a0 in QObject::event(QEvent*) (/lib/x86_64-linux-gnu/libQt6Core.so.6+0x1a04a0)
...
```
This helped pinpoint the cause of the crash.

---------

Co-authored-by: Stephen Lyons <slysven@virginmedia.com>
Co-authored-by: Vadim Peretokin <vadi2@users.noreply.github.com>
vadi2 added a commit that referenced this pull request Oct 18, 2025
<!-- Keep the title short & concise so anyone non-technical can
understand it,
     the title appears in PTB changelogs -->
#### Brief overview of PR changes/additions
Fix

```
Direct leak of 4000 byte(s) in 50 object(s) allocated from:
    #0 0x7f21286b61e7 in operator new(unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:99
    #1 0x5652d10ed62c in TriggerHighlighter::setTheme(QString const&) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x202562c)
    #2 0x5652d10ecba7 in TriggerHighlighter::TriggerHighlighter(QTextDocument*) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x2024ba7)
    #3 0x5652d0998ef2 in SingleLineTextEdit::SingleLineTextEdit(QWidget*) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x18d0ef2)
    #4 0x5652d05f581a in Ui_trigger_pattern_edit::setupUi(QWidget*) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x152d81a)
    #5 0x5652d05f2792 in dlgTriggerPatternEdit::dlgTriggerPatternEdit(QWidget*) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x152a792)
    #6 0x5652d044b2a2 in dlgTriggerEditor::dlgTriggerEditor(Host*) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x13832a2)
    #7 0x5652d08479a9 in mudlet::addConsoleForNewHost(Host*) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x177f9a9)
    #8 0x5652d086efcb in mudlet::slot_connectionDialogueFinished(QString const&, bool) (/home/runner/work/Mudlet/Mudlet/src/mudlet+0x17a6fcb)
```
#### Motivation for adding to Mudlet
Better app quality
#### Other info (issues closed, discussion etc)
Discovered when running Mudlet with cmake.
vadi2 added a commit that referenced this pull request Nov 26, 2025
…rocessing (#8571)

<!-- Keep the title short & concise so anyone non-technical can
understand it,
     the title appears in PTB changelogs -->
#### Brief overview of PR changes/additions
Fix: heap-use-after-free when cleanup runs during alias/trigger/key
processing
#### Motivation for adding to Mudlet
Fixes crash when running
#8559 (comment)
benchmark on Linux.
#### Other info (issues closed, discussion etc)
==617553==ERROR: AddressSanitizer: heap-use-after-free on address
0x51200086e6d0 at pc 0x589b650367f6 bp 0x7ffc44dbc700 sp 0x7ffc44dbc6f8
READ of size 8 at 0x51200086e6d0 thread T0
#0 0x589b650367f5 in Tree<TAlias>::isActive() const
(/home/vadi/Programs/Mudlet/build/src/mudlet+0xe8a7f5) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#1 0x589b65d81408 in TAlias::match(QString const&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bd5408) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#2 0x589b6560c156 in AliasUnit::processDataStream(QString const&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1460156) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#3 0x589b65c872b4 in Host::send(QString, bool, bool)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1adb2b4) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#4 0x589b65d96517 in TCommandLine::enterCommand(QKeyEvent*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bea517) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#5 0x589b65d93095 in TCommandLine::event(QEvent*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1be7095) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#6 0x7ac668391c8a in QApplicationPrivate::notify_helper(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qapplication.cpp:3307:31
#7 0x7ac66839b2f0 in QApplication::notify(QObject*, QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qapplication.cpp:2725:39
#8 0x7ac668b83f7f in QCoreApplication::notifyInternal2(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1109:24
#9 0x7ac66840cc0b in QWidgetWindow::event(QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qwidgetwindow.cpp:285:23
#10 0x7ac668391c8a in QApplicationPrivate::notify_helper(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qapplication.cpp:3307:31
#11 0x7ac668b83f7f in QCoreApplication::notifyInternal2(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1109:24
#12 0x7ac6677ee8e2 in
QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*)
/home/qt/work/qt/qtbase/src/gui/kernel/qguiapplication.cpp:2609:46
#13 0x7ac655cf9a04 in
QIBusPlatformInputContext::filterEventFinished(QDBusPendingCallWatcher*)
/home/qt/work/qt/qtbase/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.cpp:523:57
#14 0x7ac668be8b74 in QtPrivate::QSlotObjectBase::call(QObject*, void**)
/home/qt/work/qt/qtbase/src/corelib/kernel/qobjectdefs_impl.h:461:57
#15 0x7ac668be8b74 in void doActivate<false>(QObject*, int, void**)
/home/qt/work/qt/qtbase/src/corelib/kernel/qobject.cpp:4255:30
#16 0x7ac6671e5142 in void QMetaObject::activate<void,
QDBusPendingCallWatcher*>(QObject*, QMetaObject const*, int, void*,
QDBusPendingCallWatcher* const&)
/home/qt/work/qt/qtbase/src/corelib/kernel/qobjectdefs.h:319:17
#17 0x7ac6671e5142 in
QDBusPendingCallWatcher::finished(QDBusPendingCallWatcher*)
/home/qt/work/qt/qtbase_build/src/dbus/DBus_autogen/include/moc_qdbuspendingcall.cpp:137:32
#18 0x7ac668bdd56b in QObject::event(QEvent*)
/home/qt/work/qt/qtbase/src/corelib/kernel/qobject.cpp:1411:31
#19 0x7ac668391c8a in QApplicationPrivate::notify_helper(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qapplication.cpp:3307:31
#20 0x7ac668b83f7f in QCoreApplication::notifyInternal2(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1109:24
#21 0x7ac668b879e4 in
QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)
/home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1904:36
#22 0x7ac668e7d416 in postEventSourceDispatch
/home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:246:39
#23 0x7ac6667145c4 (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x5d5c4)
(BuildId: 1eb6131419edb83b2178b682829a6913cf682d75)
#24 0x7ac666773736 (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0xbc736)
(BuildId: 1eb6131419edb83b2178b682829a6913cf682d75)
#25 0x7ac666713a62 in g_main_context_iteration
(/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x5ca62) (BuildId:
1eb6131419edb83b2178b682829a6913cf682d75)
#26 0x7ac668e7caad in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
/home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:399:43
#27 0x7ac668b9002a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
/home/qt/work/qt/qtbase/src/corelib/kernel/qeventloop.cpp:186:22
#28 0x7ac668b8ba59 in QCoreApplication::exec()
/home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1452:36
#29 0x589b64ab0675 in main
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x904675) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#30 0x7ac66602a1c9 in __libc_start_call_main
csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#31 0x7ac66602a28a in __libc_start_main csu/../csu/libc-start.c:360:3
#32 0x589b649c1d04 in _start
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x815d04) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)

0x51200086e6d0 is located 16 bytes inside of 296-byte region
[0x51200086e6c0,0x51200086e7e8)
freed by thread T0 here:
#0 0x589b64a9b9f1 in operator delete(void*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x8ef9f1) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#1 0x589b65d80711 in TAlias::~TAlias()
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bd4711) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#2 0x589b6560eefc in AliasUnit::doCleanup()
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1462efc) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#3 0x589b65c8e88d in Host::incomingStreamProcessor(QString const&, int)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1ae288d) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#4 0x589b651b73b5 in TMainConsole::runTriggers(int)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x100b3b5) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#5 0x589b64e39c4b in TBuffer::commitLine(char, unsigned long&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0xc8dc4b) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#6 0x589b64e28d4e in
TBuffer::translateToPlainText(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>&, bool)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0xc7cd4e) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#7 0x589b651b638d in
TMainConsole::printOnDisplay(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>&, bool)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x100a38d) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#8 0x589b64f9ed5b in TLuaInterpreter::feedTriggers(lua_State*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0xdf2d5b) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#9 0x7ac66942ffa0 in luaD_precall
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:320:10
#10 0x7ac66943ad7a in luaV_execute
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/lvm.c:591:17
#11 0x7ac66942e96c in luaD_call
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:378:5
#12 0x7ac66942af70 in luaD_rawrunprotected
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:116:3
#13 0x7ac66942bb94 in luaD_pcall
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:464:12
#14 0x7ac66942bce0 in lua_pcall
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/lapi.c:821:12
#15 0x589b64fd65f1 in TLuaInterpreter::call(QString const&, QString
const&, bool) (/home/vadi/Programs/Mudlet/build/src/mudlet+0xe2a5f1)
(BuildId: c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#16 0x589b65d84d31 in TAlias::execute()
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bd8d31) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#17 0x589b65d84577 in TAlias::match(QString const&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bd8577) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#18 0x589b6560c156 in AliasUnit::processDataStream(QString const&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1460156) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#19 0x589b65c872b4 in Host::send(QString, bool, bool)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1adb2b4) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#20 0x589b65d96517 in TCommandLine::enterCommand(QKeyEvent*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bea517) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#21 0x589b65d93095 in TCommandLine::event(QEvent*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1be7095) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#22 0x7ac668391c8a in QApplicationPrivate::notify_helper(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qapplication.cpp:3307:31

previously allocated by thread T0 here:
#0 0x589b64a9b171 in operator new(unsigned long)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x8ef171) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#1 0x589b6500f595 in TLuaInterpreter::startTempAlias(QString const&,
QString const&) (/home/vadi/Programs/Mudlet/build/src/mudlet+0xe63595)
(BuildId: c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#2 0x589b6512c41d in TLuaInterpreter::tempAlias(lua_State*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0xf8041d) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#3 0x7ac66942ffa0 in luaD_precall
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:320:10
#4 0x7ac66943ad7a in luaV_execute
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/lvm.c:591:17
#5 0x7ac66942e96c in luaD_call
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:378:5
#6 0x7ac66942af70 in luaD_rawrunprotected
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:116:3
#7 0x7ac66942bb94 in luaD_pcall
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/ldo.c:464:12
#8 0x7ac66942bce0 in lua_pcall
/build/lua5.1-rMDsVj/lua5.1-5.1.5/src/lapi.c:821:12
#9 0x589b64fd65f1 in TLuaInterpreter::call(QString const&, QString
const&, bool) (/home/vadi/Programs/Mudlet/build/src/mudlet+0xe2a5f1)
(BuildId: c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#10 0x589b65d84d31 in TAlias::execute()
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bd8d31) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#11 0x589b65d84577 in TAlias::match(QString const&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bd8577) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#12 0x589b6560c156 in AliasUnit::processDataStream(QString const&)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1460156) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#13 0x589b65c872b4 in Host::send(QString, bool, bool)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1adb2b4) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#14 0x589b65d96517 in TCommandLine::enterCommand(QKeyEvent*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1bea517) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#15 0x589b65d93095 in TCommandLine::event(QEvent*)
(/home/vadi/Programs/Mudlet/build/src/mudlet+0x1be7095) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4)
#16 0x7ac668391c8a in QApplicationPrivate::notify_helper(QObject*,
QEvent*)
/home/qt/work/qt/qtbase/src/widgets/kernel/qapplication.cpp:3307:31

SUMMARY: AddressSanitizer: heap-use-after-free
(/home/vadi/Programs/Mudlet/build/src/mudlet+0xe8a7f5) (BuildId:
c98a5e4208b6daa52aa1b083c4ee6c4ab4552cc4) in Tree<TAlias>::isActive()
const
Shadow bytes around the buggy address:
  0x51200086e400: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x51200086e480: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
  0x51200086e500: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x51200086e580: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x51200086e600: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
=>0x51200086e680: fa fa fa fa fa fa fa fa fd fd[fd]fd fd fd fd fd
  0x51200086e700: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x51200086e780: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
  0x51200086e800: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x51200086e880: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x51200086e900: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==617553==ABORTING

Co-authored-by: Vadim Peretokin <vadi2@users.noreply.github.com>
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