Nextcloud-Desktop segmentation error

[Mte90]

Are few months that my Nextcloud desktop client is not working.
So I was hoping that the latest release was fixing but nevermind the problem is still going.So I chosen ti compile the package on my own but... it still crashing anyway.
The cmd version is working but not the gui version and I think that is something with Qt.
Running gdb on the exectuable:

Code: [Select]

Starting program: /home/mte90/Desktop/kde/nextcloud-desktop-2.6.1/debian/tmp/usr/bin/nextcloud
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe0f9a700 (LWP 26130)]
[New Thread 0x7fffdb2a6700 (LWP 26131)]
[New Thread 0x7fffd3fff700 (LWP 26133)]
[New Thread 0x7fffd2289700 (LWP 26134)]
[New Thread 0x7fffd1a67700 (LWP 26135)]
[New Thread 0x7fffd1256700 (LWP 26136)]
[Detaching after fork from child process 26137]
[Detaching after fork from child process 26141]
[New Thread 0x7fffd085c700 (LWP 26147)]

** (process:26124): CRITICAL **: 11:51:14.204: cloud_providers_dbus_object_skeleton_new: assertion 'g_variant_is_object_path (object_path)' failed

(process:26124): GLib-GObject-CRITICAL **: 11:51:14.204: g_object_set: assertion 'G_IS_OBJECT (object)' failed
[New Thread 0x7fffbbfff700 (LWP 26148)]

Thread 1 "nextcloud" received signal SIGSEGV, Segmentation fault.
0x00007ffff7d99619 in g_dbus_object_get_object_path () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
(gdb) backtrace
#0  0x00007ffff7d99619 in g_dbus_object_get_object_path () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#1  0x00007ffff7d9f8e3 in g_dbus_object_manager_server_export () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#2  0x00007ffff7c172e6 in cloud_providers_provider_exporter_add_account () at /usr/lib/x86_64-linux-gnu/libcloudproviders.so.0
#3  0x00007ffff7c15cfd in  () at /usr/lib/x86_64-linux-gnu/libcloudproviders.so.0
#4  0x00007ffff7c398e6 in  () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#5  0x00007ffff7c3b4f9 in g_object_new_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6  0x00007ffff7c3b849 in g_object_new () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7  0x000055555573e3eb in CloudProviderWrapper::CloudProviderWrapper(QObject*, OCC::Folder*, _CloudProvidersProviderExporter*)
    (this=0x55555612d190, parent=<optimized out>, folder=0x5555563458d0, cloudprovider=0x7fffc800d520) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:208
#8  0x000055555573a9ce in CloudProviderManager::slotFolderListChanged(QMap<QString, OCC::Folder*> const&) (this=0x555556122b40, folderMap=...)
    at /usr/include/x86_64-linux-gnu/qt5/QtCore/qmap.h:1292
#9  0x000055555573ac04 in CloudProviderManager::registerSignals() (this=0x555556122b40) at ./src/gui/cloudproviders/cloudprovidermanager.cpp:49
#10 0x00007ffff7d89677 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#11 0x00007ffff7d898a8 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#12 0x00007ffff7d27f69 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#13 0x00007ffff7d28a8d in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#14 0x00007ffff7d8120f in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#15 0x00007ffff7d27f69 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#16 0x00007ffff7d27fa9 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#17 0x00007ffff7e9dd7e in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007ffff7e9e130 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
--Type <RET> for more, q to quit, c to continue without paging--c
#19 0x00007ffff7e9e1bf in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fffecb327f1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fffecadb71b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fffecae31c2 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x000055555560f526 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./src/gui/main.cpp:167
GDB on the binary shipped with Debian sid the log is similar:

Code: [Select]

Thread 1 "nextcloud" received signal SIGSEGV, Segmentation fault.
0x00007ffff7d99619 in g_dbus_object_get_object_path () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
(gdb) backtrace
#0  0x00007ffff7d99619 in g_dbus_object_get_object_path () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#1  0x00007ffff7d9f8e3 in g_dbus_object_manager_server_export () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#2  0x00007ffff7c172e6 in cloud_providers_provider_exporter_add_account () at /usr/lib/x86_64-linux-gnu/libcloudproviders.so.0
#3  0x00007ffff7c15cfd in  () at /usr/lib/x86_64-linux-gnu/libcloudproviders.so.0
#4  0x00007ffff7c398e6 in  () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#5  0x00007ffff7c3b4f9 in g_object_new_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6  0x00007ffff7c3b849 in g_object_new () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7  0x000055555573e3eb in CloudProviderWrapper::CloudProviderWrapper(QObject*, OCC::Folder*, _CloudProvidersProviderExporter*)
    (this=0x555556bb3c00, parent=<optimized out>, folder=0x555556651800, cloudprovider=0x7fffc800d520) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:208
#8  0x000055555573a9ce in CloudProviderManager::slotFolderListChanged(QMap<QString, OCC::Folder*> const&) (this=0x5555560694d0, folderMap=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qmap.h:1292
#9  0x000055555573ac04 in CloudProviderManager::registerSignals() (this=0x5555560694d0) at ./src/gui/cloudproviders/cloudprovidermanager.cpp:49
#10 0x00007ffff7d89677 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#11 0x00007ffff7d898a8 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#12 0x00007ffff7d27f69 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#13 0x00007ffff7d28a8d in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#14 0x00007ffff7d8120f in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#15 0x00007ffff7d27f69 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#16 0x00007ffff7d27fa9 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#17 0x00007ffff7e9dd7e in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007ffff7e9e130 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007ffff7e9e1bf in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fffecb327f1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fffecadb71b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fffecae31c2 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x000055555560f526 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./src/gui/main.cpp:167Someone has suggestions?

[Mte90]

I installed also the experimental package of https://packages.debian.org/experimental/libglib2.0-0 just to see if fix the problem but it didn't.

[melmarker]

a) try a new machine and a new installation
b) try pure debian

really - it isn't reproducible, if it would be there would be at least one user out of over 2500 with popcon on who will complain about the same bug.

Edit: So my best bet is that your installation is messed up - do you have any self built packges installed, no matter what - the infamous triple "configure; make; make install" or " cmake; make; make install" ??

[Mte90]

I have some package compiled on myself (neovim as example) but no debian packages rebuilted.
I use KDE and a lot of qt apps but this is the only one that crashes since I think 2 months I think.

[axt]

Starting program: /home/mte90/Desktop/(...)

That's scary. Why not from /opt?

If you need it now and you don't find the cause yet, you could (temporarily) use a daily 2.7.0 AppImage (or the stable 2.6.1).

[Mte90]

This path was from testing :-)I don't like appimage because of the huge size and because I have already all the dependence, so I more interested to understand what is the problem :-/

[axt]

I don't like appimage

Just so we're clear, neither do I. That's why I wrote "now", "temporarily" and so on.

[melmarker]

if the appimage would work - it would solve nothing - it would only mean: Hey, something is wrong with the current installation, so my bet is: Fix the mess and be happy. And there is also no magic in git builds if two versions are faulty on exactly one machine. Hmm - maybe i don't know enough about debian and Qt - i should really learn this stuff ...

[Mte90]

Do you have any issue on investigating what is the problem?
Right now a ldd: https://pastebin.com/SvNQMBx5
I don't see anything wrong there for path and also the stuff I compiled doesn't involve new libraries but only specific software.

[melmarker]

ok - easy to answer:
* i cant't reproduce it - so i don't care about. The packages has enough users, so if the bug would be reproducible the debian bts would be flooded with grave, important or serious bugs - nothing of that happend right now. Same for ubuntu users. Just not happend. So my suggestion is that the problem is in your installation, not in debian.

[Mte90]

Just to update, I tested on my laptop where I have too siduction and the problem doesn't happen.So I am investigating more and I will open a bug to nextcloud-desktop just to understand where is the error.Because I don't know specifically what is happening.

[Mte90]

Just for reference there is a bug with nextcloud on parsing the settings https://github.com/nextcloud/desktop/issues/1669