stack trace for bug #755

[Miika Turkia]

I do not have my trac password with me so I cannot comment on the actual
bug report. But here is a stack trace from current master version of
Subsurface (Ubuntu 14.10 as in the bug report).

#0  strlen () at ../sysdeps/x86_64/strlen.S:106
#1  0x00007ffff20b523e in __GI___strdup (s=0x0) at strdup.c:41
#2  0x00000000004982e8 in MainTab::acceptChanges (this=this at entry=0x936320)
at ../qt-ui/maintab.cpp:698
#3  0x0000000000542850 in MainTab::qt_static_metacall (_o=0x936320,
_id=<optimized out>, _a=0x7fffffffd130, _c=<optimized out>) at
.moc/moc_maintab.cpp:122
#4  0x00007ffff2db3a7a in QMetaObject::activate(QObject*, QMetaObject
const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff3613bf2 in QAction::triggered(bool) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#6  0x00007ffff36155c3 in QAction::activate(QAction::ActionEvent) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007ffff39d4d9f in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#8  0x00007ffff39d4ed4 in QAbstractButton::mouseReleaseEvent(QMouseEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007ffff3a8c32a in QToolButton::mouseReleaseEvent(QMouseEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#10 0x00007ffff3669ce8 in QWidget::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x00007ffff361a11c in QApplicationPrivate::notify_helper(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007ffff36209be in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007ffff2d9f86d in QCoreApplication::notifyInternal(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#14 0x00007ffff362007f in QApplicationPrivate::sendMouseEvent(QWidget*,
QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007ffff3695bde in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#16 0x00007ffff3695477 in QApplication::x11ProcessEvent(_XEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#17 0x00007ffff36bd432 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#18 0x00007fffee3ebc5d in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fffee3ebf48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fffee3ebffc in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007ffff2dcd031 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#22 0x00007ffff36bd4e6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007ffff2d9e4f1 in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#24 0x00007ffff2d9e805 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#25 0x00007ffff2da3f67 in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#26 0x000000000043482a in main (argc=1, argv=0x7fffffffdeb8) at
../main.cpp:63

And the line calling strdup (in case my sources are slightly off sync):

                if (!same_string(displayedTrip.location,
currentTrip->location)) {
                        currentTrip->location =
strdup(displayedTrip.location);
                        mark_divelist_changed(true);
                }

Reproduction steps:
- start new divelog
- import dives/test0.xml-test38.xml
- select the trip on top of the divelist
- edit notes
- save

BTW if I modify the trip location before saving, no crash.

miika
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