[konsole] [Bug 386065] New: Crash when scrolling in tmux

[JR]

https://bugs.kde.org/show_bug.cgi?id=386065

            Bug ID: 386065
           Summary: Crash when scrolling in tmux
           Product: konsole
           Version: 17.08.2
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: zorael at gmail.com
  Target Milestone: ---

Created attachment 108505
  --> https://bugs.kde.org/attachment.cgi?id=108505&action=edit
backtrace

Manjaro x64 current (171022), konsole package is 17.08.2-1 and the program
itself reports 17.08.2. Qt5 packages are version 5.9.2-1. (Not sure which
component to pick so I'll go with general.)

When scrolling in tmux Konsole very reliably crashes. It happens with the
Konsole from the Manjaro package as well as one compiled from git (4203dd) and
affects Yakuake as well. I'm attaching the full 42-frame backtrace[1] but the
last 10 are as follows:

#0  0x00007ffff0d8e8a0 in raise () from /usr/lib/libc.so.6
#1  0x00007ffff0d8ff09 in abort () from /usr/lib/libc.so.6
#2  0x00007ffff0dd1517 in __libc_message () from /usr/lib/libc.so.6
#3  0x00007ffff0dd7c84 in malloc_printerr () from /usr/lib/libc.so.6
#4  0x00007ffff0dd9599 in _int_free () from /usr/lib/libc.so.6
#5  0x00007fffed2782e4 in hb_buffer_destroy () from /usr/lib/libharfbuzz.so.0
#6  0x00007ffff2567f88 in QTextEngine::shapeTextWithHarfbuzzNG(QScriptItem
const&, unsigned short const*, int, QFontEngine*, QVector<unsigned int> const&,
bool, bool) const ()
   from /usr/lib/libQt5Gui.so.5
#7  0x00007ffff256a8fe in QTextEngine::shapeText(int) const () from
/usr/lib/libQt5Gui.so.5
#8  0x00007ffff256b490 in QTextEngine::shape(int) const () from
/usr/lib/libQt5Gui.so.5
#9  0x00007ffff2572921 in QTextEngine::shapeLine(QScriptLine const&) () from
/usr/lib/libQt5Gui.so.5
#10 0x00007ffff270e8ec in QPainter::drawText(QPointF const&, QString const&,
int, int) () from /usr/lib/libQt5Gui.so.5

This may be a harfbuzz bug, but I believe the behaviour started with the recent
Konsole update. I haven't tried bisecting anything yet.


[1]: Also https://pastebin.com/J0TawBHq

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