kdevelop/formatters/astyle/lib/ASBeautifier.cpp:
 843│                 // and then remove it from the active beautifier stack and delete it.
 844│                 if (!backslashEndsPrevLine && isInDefineDefinition && !isInDefine)
 845│                 {
 846│                         string beautifiedLine;
 847│                         ASBeautifier* defineBeautifier;
 848│
 849│                         isInDefineDefinition = false;
 850│                         defineBeautifier = activeBeautifierStack->back();
 851│                         activeBeautifierStack->pop_back();
 852│
 853├>                        beautifiedLine = defineBeautifier->beautify(line);
 854│                         delete defineBeautifier;
 855│                         return beautifiedLine;
 856│                 }
 857│
 858│                 // unless this is a multi-line #define, return this precompiler line as is.
 859│                 if (!isInDefine && !isInDefineDefinition)
 860│                         return originalLine;
 861│         }
 862│
 863│         // if there exists any worker beautifier in the activeBeautifierStack,
-------
(gdb) print defineBeautifier
$1 = (astyle::ASBeautifier *) 0x21
(gdb) print activeBeautifierStack->size()
$2 = 17592176799899
(gdb) 

stacktrace:
#0  astyle::ASBeautifier::beautify (this=0x2973e60, originalLine=...) at /home/marcin/projects/c++-local/kdevelop/formatters/astyle/lib/ASBeautifier.cpp:853
#1  0x00007fffbf7a4a7c in astyle::ASFormatter::nextLine (this=0x2973e60) at /home/marcin/projects/c++-local/kdevelop/formatters/astyle/lib/ASFormatter.cpp:1304
#2  0x00007fffbf78bf1b in AStyleFormatter::formatSource (this=0x2973e60, text=..., leftContext=..., rightContext=...) at /home/marcin/projects/c++-local/kdevelop/formatters/astyle/astyle_forma
tter.cpp:54
#3  0x00007fffbf783792 in AStylePlugin::formatSourceWithStyle (this=this@entry=0x2973d00, s=..., text=..., mime=..., leftContext=..., rightContext=...) at /home/marcin/projects/c++-local/kdeve
lop/formatters/astyle/astyle_plugin.cpp:96
#4  0x00007fffbf783292 in AStylePlugin::formatSource (this=0x2973d00, text=..., url=..., mime=..., leftContext=..., rightContext=...) at /home/marcin/projects/c++-local/kdevelop/formatters/ast
yle/astyle_plugin.cpp:101
#5  0x00007ffff745c561 in KDevelop::SourceFormatterController::formatDocument (this=this@entry=0xdd6870, doc=doc@entry=0x3578ab0, formatter=formatter@entry=0x2973d28, mime=...) at /home/marcin
/projects/c++-local/kdevplatform/shell/sourceformattercontroller.cpp:369
#6  0x00007ffff745dc13 in KDevelop::SourceFormatterController::beautifySource (this=0xdd6870) at /home/marcin/projects/c++-local/kdevplatform/shell/sourceformattercontroller.cpp:324
#7  0x00007ffff5dad0ef in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007ffff5138152 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007ffff5139580 in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#10 0x00007ffff51396e7 in QAction::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x00007ffff62458a7 in KAction::event(QEvent*) () from /usr/lib/libkdeui.so.5
#12 0x00007ffff513e8ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007ffff514125b in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007ffff63211a6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#15 0x00007ffff5d9863e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#16 0x00007ffff5171754 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#17 0x00007ffff5171bb3 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#18 0x00007ffff5142dd0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#19 0x00007ffff63211a6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#20 0x00007ffff5d9863e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#21 0x00007ffff51e1649 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007ffff51e1a81 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007ffff51b8859 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007ffff51e40b2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#25 0x00007fffeece1f05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fffeece2248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fffeece2304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007ffff5dc7036 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#29 0x00007ffff51e41ae in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#30 0x00007ffff5d9738f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#31 0x00007ffff5d97618 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#32 0x00007ffff5d9ccf6 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#33 0x000000000040e556 in main (argc=<optimised out>, argv=<optimised out>) at /home/marcin/projects/c++-local/kdevelop/app/main.cpp:499

Reproducible: Always

Steps to Reproduce:
1. Paste this wrong macro:
---content--
#if 1
# define macro(param) \
#endif
--/content--
2. Save the .cpp file.
3. Make reformat source function.

I wanted to clone whole line and move second one below by ctrl+shift+down_arrow, but reformat sources makes crash too.



Compiles from sources, from master branch, HEAD on 97f1c7ada837765e11c7363e22273cfc8d38f9d1.