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[Bug]: Segmentation fault #8340

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Closed
5 of 8 tasks
Flashwalker opened this issue Jun 3, 2025 · 6 comments
Closed
5 of 8 tasks

[Bug]: Segmentation fault #8340

Flashwalker opened this issue Jun 3, 2025 · 6 comments
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@mgallien
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bug

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@Flashwalker
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Flashwalker commented Jun 3, 2025 •
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⚠️ Before submitting, please verify the following: ⚠️

Bug description

Nextcloud desktop crash on start

Steps to reproduce

  1. Start nextcloud
  2. wait few seconds
  3. crash

Expected behavior

no crash

Which files are affected by this bug

30let-top-3.1.jpg

Operating system

Linux

Which version of the operating system you are running.

KDE Neon 6.3 (Ubuntu 24.04)

Package

Distro package manager

Nextcloud Server version

27.1.2

Nextcloud Desktop Client version

3.16.4

Is this bug present after an update or on a fresh install?

Before some updates everything worked fine

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

  • Default internal user-backend
  • LDAP/ Active Directory
  • SSO - SAML
  • Other

Nextcloud Server logs



Additional info


nextcloud desktop stdout



$ LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 nextcloud
Failed to initialize instances shared memory:  "QSharedMemory::handle: doesn't exist"
nextcloud.gui.application: Migrating old config from "/home/user/.local/share/Nextcloud" to "/home/user/.config/Nextcloud"
nextcloud.gui.application: Failed to move the old config directory "/home/user/.local/share/Nextcloud" to new location "/home/user/.config/Nextcloud"
nextcloud.gui.application: Will move the individual files: QList("user_Nextcloud_sync.log", "COMPANY_Nextcloud_sync.log", "Nextcloud_sync.log")
nextcloud.gui.account.manager: Checking for accounts versions.
nextcloud.gui.account.manager: Config accounts version: 13
nextcloud.gui.account.manager: Max accounts Version is set to: 13
nextcloud.gui.folder.manager: FolderDefinition::maxSettingsVersion: 13
nextcloud.gui.folder.manager: FolderDefinition::maxSettingsVersion: 13
nextcloud.gui.folder.manager: FolderDefinition::maxSettingsVersion: 13
Segmentation fault





 

nextcloud desktop gdb backtrace



$ gdb nextcloud
GNU gdb (Ubuntu 15.0.50.20240403-0ubuntu1) 15.0.50.20240403-git
Copyright (C) 2024 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from nextcloud...

This GDB supports auto-downloading debuginfo from the following URLs:
  <https://debuginfod.neon.kde.org/>
  <https://debuginfod.ubuntu.com/>
Enable debuginfod for this session? (y or [n]) y
Debuginfod has been enabled.
To make this setting permanent, add 'set debuginfod enabled on' to .gdbinit.
Downloading separate debug info for /usr/bin/nextcloud
(No debugging symbols found in nextcloud)                                                                                                             




(gdb) run
Starting program: /usr/bin/nextcloud 
Downloading separate debug info for system-supplied DSO at 0x7ffff7fc3000
Downloading separate debug info for /lib/x86_64-linux-gnu/libnextcloudsync.so.0                                                                        
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libnextcloudsync.so.0                                                       
Downloading separate debug info for /lib/x86_64-linux-gnu/libnextcloudsync.so.0
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libnextcloud_csync.so.0                                                     
Downloading separate debug info for /lib/x86_64-linux-gnu/libnextcloud_csync.so.0
Downloading separate debug info for /lib/x86_64-linux-gnu/libcrypto.so.3                                                                               
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libgio-2.0.so.0                                                             
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libgobject-2.0.so.0                                                         
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libglib-2.0.so.0                                                            
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[Thread debugging using libthread_db enabled]                                                                                                          
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libxslt.so.1                                                                
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libproxy.so.1                                                               
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libplc4.so                                                                  
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libcap.so.2                                                                 
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libtinfo.so.6                                                               
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[New Thread 0x7fffd95ff6c0 (LWP 34626)]                                                                                                                
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libcanberra.so.0                                                            
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[New Thread 0x7fffd1a526c0 (LWP 34634)]                                                                                                                
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nextcloud.gui.application: Migrating old config from "/home/user/.local/share/Nextcloud" to "/home/user/.config/Nextcloud"
nextcloud.gui.application: Failed to move the old config directory "/home/user/.local/share/Nextcloud" to new location "/home/user/.config/Nextcloud"
nextcloud.gui.application: Will move the individual files: QList("user_Nextcloud_sync.log", "COMPANY_Nextcloud_sync.log", "Nextcloud_sync.log")
nextcloud.gui.account.manager: Checking for accounts versions.
nextcloud.gui.account.manager: Config accounts version: 13
nextcloud.gui.account.manager: Max accounts Version is set to: 13
nextcloud.gui.folder.manager: FolderDefinition::maxSettingsVersion: 13
nextcloud.gui.folder.manager: FolderDefinition::maxSettingsVersion: 13
nextcloud.gui.folder.manager: FolderDefinition::maxSettingsVersion: 13
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libjpegxr.so.0                                                              
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Downloading separate debug info for /usr/lib/x86_64-linux-gnu/libheif/plugins/libheif-aomdec.so                                                        
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/libheif/plugins/libheif-libde265.so                                                      
Downloading separate debug info for /lib/x86_64-linux-gnu/libde265.so.0                                                                                
[Thread 0x7fffa21fa6c0 (LWP 34654) exited]                                                                                                             
Downloading separate debug info for /lib/x86_64-linux-gnu/libhwy.so.1
Downloading separate debug info for /lib/x86_64-linux-gnu/libraw.so.23                                                                                 
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libraw.so.23                                                                
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Downloading separate debug info for /lib/x86_64-linux-gnu/libdav1d.so.7                                                                                
Downloading separate debug info for /lib/x86_64-linux-gnu/libgav1.so.1                                                                                 
Downloading separate debug info for /lib/x86_64-linux-gnu/librav1e.so.0                                                                                
Downloading separate debug info for /lib/x86_64-linux-gnu/libSvtAv1Enc.so.1                                                                            
Downloading separate debug info for /lib/x86_64-linux-gnu/libyuv.so.0                                                                                  
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_synchronization.so.20220623                                                          
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_synchronization.so.20220623                                         
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_synchronization.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_graphcycles_internal.so.20220623                                    
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_stacktrace.so.20220623                                              
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_stacktrace.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_symbolize.so.20220623                                               
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warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_time.so.20220623                                                    
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_time.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_malloc_internal.so.20220623                                         
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_malloc_internal.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_base.so.20220623                                                    
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_base.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_spinlock_wait.so.20220623                                           
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_spinlock_wait.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_raw_logging_internal.so.20220623                                    
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_raw_logging_internal.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_debugging_internal.so.20220623                                      
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_debugging_internal.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_demangle_internal.so.20220623                                       
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_demangle_internal.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_strings.so.20220623                                                 
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_strings.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_time_zone.so.20220623                                               
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_time_zone.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_int128.so.20220623                                                  
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_int128.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_strings_internal.so.20220623                                        
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_strings_internal.so.20220623
warning: could not find '.gnu_debugaltlink' file for /lib/x86_64-linux-gnu/libabsl_throw_delegate.so.20220623                                          
Downloading separate debug info for /lib/x86_64-linux-gnu/libabsl_throw_delegate.so.20220623
Downloading separate debug info for /lib/x86_64-linux-gnu/libImath-3_1.so.29                                                                           
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/qt6/plugins/iconengines/libqsvgicon.so                                                   
[New Thread 0x7fffa21fa6c0 (LWP 34664)]                                                                                                                
[New Thread 0x7fff87dff6c0 (LWP 34666)]
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/gio/modules/libgvfsdbus.so
warning: could not find '.gnu_debugaltlink' file for /usr/lib/x86_64-linux-gnu/gio/modules/libgvfsdbus.so                                              
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/gio/modules/libgvfsdbus.so
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/gvfs/libgvfscommon.so                                                                    
warning: could not find '.gnu_debugaltlink' file for /usr/lib/x86_64-linux-gnu/gvfs/libgvfscommon.so                                                   
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/gvfs/libgvfscommon.so
Downloading separate debug info for /lib/x86_64-linux-gnu/libnss_mdns4_minimal.so.2                                                                    
Downloading separate debug info for /lib/x86_64-linux-gnu/libnss_mdns4_minimal.so.2                                                                    
[New Thread 0x7fff875fe6c0 (LWP 34675)]                                                                                                                
[New Thread 0x7fff86dfd6c0 (LWP 34676)]
[New Thread 0x7fff865fc6c0 (LWP 34677)]
[New Thread 0x7fff85dfb6c0 (LWP 34678)]
[New Thread 0x7fff855fa6c0 (LWP 34679)]

Thread 1 "nextcloud" received signal SIGSEGV, Segmentation fault.
Downloading source file /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h
enumExtendMode (e=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77                                   
warning: 77	/usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h: No such file or directory





(gdb) bt full

#0  enumExtendMode (e=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77
#1  enumExtendMode (e=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qmetaobject.cpp:3203
#2  QMetaEnum::valueToKey (this=0x7fffffffc2b0, value=2)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qmetaobject.cpp:3419
        mode = <optimized out>
#3  0x00007fffe8d1e8e4 in qt_QMetaEnum_debugOperator (dbg=..., value=2, meta=<optimized out>, name=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/io/qdebug.cpp:1470
        saver = {d = std::unique_ptr<QDebugStateSaverPrivate> = {get() = 0x555557886d90}}
        me = {mobj = 0x7ffff7bfd5a0 <CSyncEnums::staticMetaObject>, data = {d = 0x7ffff7bef240}}
        verbosity = 2
        key = <optimized out>
        scoped = <optimized out>
#4  0x00007ffff7d8d221 in OCC::ProcessDirectoryJob::processFile(OCC::ProcessDirectoryJob::PathTuple, OCC::LocalInfo const&, OCC::RemoteInfo const&, OCC::SyncJournalFileRecord const&) () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#5  0x00007ffff7d8f4ae in OCC::ProcessDirectoryJob::process() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#6  0x00007fffe8c77a99 in QtPrivate::QSlotObjectBase::call
    (a=0x7fffffffc800, r=<optimized out>, this=0x5555578c5280, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#7  doActivate<false> (sender=0x5555572192a0, signal_index=5, argv=0x7fffffffc800)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
        obj = {m_slotObject = std::unique_ptr<QtPrivate::QSlotObjectBase> = {get() = 0x5555578c5280}}
        receiver = <optimized out>
        td = <optimized out>
        receiverInSameThread = <optimized out>
        senderData = {previous = 0x0, receiver = 0x5555578c30d0, sender = 0x5555572192a0, signal = 5}
        c = 0x5555578c52b0
        connections = {d = {ptr = 0x5555578c5250}}
        list = 0x5555576e6250
        inSenderThread = <optimized out>
        highestConnectionId = 3
        signalVector = 0x5555576e61e0
        currentThreadId = 0x7fffd9ad1100
        sp = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--
        signal_spy_set = 0x0
        empty_argv = {0x0}
        senderDeleted = false
#8  0x00007ffff7d0615c in OCC::DiscoverySingleDirectoryJob::finished(OCC::Result<QList<OCC::RemoteInfo>, OCC::HttpError> const&) ()
    at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#9  0x00007ffff7d9bbe8 in OCC::DiscoverySingleDirectoryJob::lsJobFinishedWithoutErrorSlot() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#10 0x00007fffe8c77a99 in QtPrivate::QSlotObjectBase::call
    (a=0x7fffffffc938, r=<optimized out>, this=0x55555748d930, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#11 doActivate<false> (sender=0x7fffd400f460, signal_index=9, argv=0x7fffffffc938)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
        obj = {m_slotObject = std::unique_ptr<QtPrivate::QSlotObjectBase> = {get() = 0x55555748d930}}
        receiver = <optimized out>
        td = <optimized out>
        receiverInSameThread = <optimized out>
        senderData = {previous = 0x0, receiver = 0x5555572192a0, sender = 0x7fffd400f460, signal = 9}
        c = 0x555557894ed0
        connections = {d = {ptr = 0x5555578c5560}}
        list = 0x55555748d8b0
        inSenderThread = <optimized out>
        highestConnectionId = 4
        signalVector = 0x55555748d800
        currentThreadId = 0x7fffd9ad1100
        sp = <optimized out>
        signal_spy_set = 0x0
        empty_argv = {0x0}
        senderDeleted = false
#12 0x00007fffe8c77a99 in QtPrivate::QSlotObjectBase::call
    (a=0x7fffffffca08, r=<optimized out>, this=0x555557405d50, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#13 doActivate<false> (sender=0x7fffffffcc50, signal_index=6, argv=0x7fffffffca08)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
        obj = {m_slotObject = std::unique_ptr<QtPrivate::QSlotObjectBase> = {get() = 0x555557405d50}}
--Type <RET> for more, q to quit, c to continue without paging--
        receiver = <optimized out>
        td = <optimized out>
        receiverInSameThread = <optimized out>
        senderData = {previous = 0x7fffffffcf70, receiver = 0x7fffd400f460, sender = 0x7fffffffcc50, signal = 6}
        c = 0x5555577c2f90
        connections = {d = {ptr = 0x7fff780a0ec0}}
        list = 0x55555778c3f0
        inSenderThread = <optimized out>
        highestConnectionId = 4
        signalVector = 0x55555778c370
        currentThreadId = 0x7fffd9ad1100
        sp = <optimized out>
        signal_spy_set = 0x0
        empty_argv = {0x0}
        senderDeleted = false
#14 0x00007ffff7dd8338 in OCC::LsColXMLParser::parse(QByteArray const&, QHash<QString, OCC::ExtraFolderInfo>*, QString const&) ()
    at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#15 0x00007ffff7dd9761 in OCC::LsColJob::finished() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#16 0x00007ffff7dcb3d8 in OCC::AbstractNetworkJob::slotFinished() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#17 0x00007fffe8c77a99 in QtPrivate::QSlotObjectBase::call
    (a=0x7fffffffcf98, r=<optimized out>, this=0x555557260a50, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#18 doActivate<false> (sender=0x5555579ddae0, signal_index=12, argv=0x7fffffffcf98)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
        obj = {m_slotObject = std::unique_ptr<QtPrivate::QSlotObjectBase> = {get() = 0x555557260a50}}
        receiver = <optimized out>
        td = <optimized out>
        receiverInSameThread = <optimized out>
        senderData = {previous = 0x0, receiver = 0x7fffd400f460, sender = 0x5555579ddae0, signal = 12}
        c = 0x5555577e2990
        connections = {d = {ptr = 0x5555577e2960}}
        list = 0x5555577e3020
        inSenderThread = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--
        highestConnectionId = 17
        signalVector = 0x5555577e2f40
        currentThreadId = 0x7fffd9ad1100
        sp = <optimized out>
        signal_spy_set = 0x0
        empty_argv = {0x0}
        senderDeleted = false
#19 0x00007fffe8c00b3d in QObject::event (this=0x5555579ddae0, e=0x7fff7808ccf0)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:1431
        mce = 0x7fff7808ccf0
        connections = 0x5555577e2960
        sender = {previous = 0x0, receiver = 0x5555579ddae0, sender = 0x555557126230, signal = 15}
#20 0x00007ffff740551d in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5555579ddae0, e=0x7fff7808ccf0)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/widgets/kernel/qapplication.cpp:3301
        consumed = false
        filtered = false
        threadData = <optimized out>
#21 0x00007fffe8cb0dd0 in QCoreApplication::notifyInternal2 (receiver=0x5555579ddae0, event=0x7fff7808ccf0)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qcoreapplication.cpp:1106
        d = <optimized out>
        threadData = 0x555555c3a870
        selfRequired = <optimized out>
        result = false
        cbdata = {0x5555579ddae0, 0x7fff7808ccf0, 0x7fffffffd0bf}
        scopeLevelCounter = {threadData = 0x555555c3a870}
#22 0x00007fffe8cb0e1d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qcoreapplication.cpp:1546
#23 0x00007fffe8cb116b in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x555555c3a870)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qcoreapplication.cpp:1879
        e = 0x7fff7808ccf0
        pe = <optimized out>
        r = <optimized out>
        relocker = {m_func = {__locker = <optimized out>}, m_invoke = <optimized out>}
--Type <RET> for more, q to quit, c to continue without paging--
        event_deleter = std::unique_ptr<QEvent> = {get() = <optimized out>}
        locker = {_M_device = 0x555555c3a8b8, _M_owns = false}
        startOffset = 0
        i = @0x555555c3a8a8: 2
        cleanup = {receiver = <optimized out>, event_type = <optimized out>, data = <optimized out>, exceptionCaught = <optimized out>}
#24 0x00007fffe8a6209f in postEventSourceDispatch (s=0x555555c82f40)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qeventdispatcher_glib.cpp:246
        source = 0x555555c82f40
#25 0x00007fffe8f6c5c5 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fffe8fcb737 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fffe8f6ba63 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fffe8a60b3f in QEventDispatcherGlib::processEvents (this=0x555555c3c760, flags=...)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qeventdispatcher_glib.cpp:399
        d = 0x555555c54ba0
        canWait = <optimized out>
        savedFlags = {<QtPrivate::QFlagsStorageHelper<QEventLoop::ProcessEventsFlag, 4>> = {<QtPrivate::QFlagsStorage<QEventLoop::ProcessEventsFlag>> = {static IntegerSize = 4, i = 0}, <No data fields>}, <No data fields>}
        result = <optimized out>
#29 0x00007fffe8cbb4bb in QEventLoop::exec (this=0x7fffffffd3e0, flags=...)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77
        d = 0x5555574bdc20
        threadData = <optimized out>
        locker = {m_mutex = 0x555555b8ad58, m_isLocked = false}
        ref = {d = <optimized out>, locker = <optimized out>, exceptionCaught = <optimized out>}
        app = <optimized out>
#30 0x00007fffe8cb405f in QCoreApplication::exec () at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77
        threadData = 0x555555c3a870
        eventLoop = {<QObject> = {_vptr.QObject = 0x7fffe8dd7680 <vtable for QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fffe8968c70 <_ZN7QObject32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0+272>, data = 0x7fffe8968b60 <_ZN7QObject32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0>, static_metacall = 0x7fffe8c13720 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7fffe8dd59e0 <_ZN7QObject36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0>, extradata = 0x0}}, d_ptr = {d = 0x5555574bdc20}}, static staticMetaObject = {d = {superdata = {direct = 0x7fffe8dd3e00 <QObject::staticMetaObject>}, stringdata = 0x7fffe896532c <_ZN10QEventLoop32qt_staticMetaObjectStat--Type <RET> for more, q to quit, c to continue without paging--
icContentIN12_GLOBAL__N_129qt_meta_tag_ZN10QEventLoopE_tEEE.lto_priv.0+236>, data = 0x7fffe8965240 <_ZN10QEventLoop32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_129qt_meta_tag_ZN10QEventLoopE_tEEE.lto_priv.0>, static_metacall = 0x7fffe8cb8900 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7fffe8dd4720 <_ZN10QEventLoop36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_129qt_meta_tag_ZN10QEventLoopE_tEEE.lto_priv.0>, extradata = 0x0}}}
        returnCode = <optimized out>
#31 0x000055555563eb14 in ??? ()
#32 0x00007fffe802a1ca in __libc_start_call_main (main=main@entry=0x55555563e700, argc=argc@entry=1, argv=argv@entry=0x7fffffffd7a8)
    at ../sysdeps/nptl/libc_start_call_main.h:58
        self = <optimized out>
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737488345000, -3842642318540225327, 1, 0, 93824998329240, 140737354125312, -3842642318483602223, -3842662497819245359}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x1, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1}}}
        not_first_call = <optimized out>
#33 0x00007fffe802a28b in __libc_start_main_impl
    (main=0x55555563e700, argc=1, argv=0x7fffffffd7a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffd798) at ../csu/libc-start.c:360
#34 0x00005555556a02b5 in ??? ()
(gdb) 





 

Before the crash:


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  @mgallien





  


    

      

  

    

        
    
    

  


      
          
  
      
            Copy link

  

      
    

  


  

      

  
    Collaborator


      

  


  

    

      

      
            mgallien
  

      

      

      commented


        Jun 4, 2025


      
    


  





      


        


  
    

      
          
can you try reporting this to your distribution ?

I am wondering if that could be a packaging issue

      		
    

  





        


            

            
            

              
            

        

      


      

            
  
  

    
  
    
    

  

  

  


    












      

  
            


    

    

      
    

    


      

          @mgallien
mgallien




              self-assigned this


      Jun 4, 2025

    

  



    


    

    

      
    

    


      

          @joshtrichards
joshtrichards




        changed the title
[Bug]:

[Bug]: Segmental fault


      Jun 4, 2025

    

  



    

    

      
    

    


      

          @joshtrichards
joshtrichards




        changed the title
[Bug]: Segmental fault

[Bug]: Segmentation fault


      Jun 4, 2025

    

  








      

  
      



  

  @cypx





  


    

      

  

    

        
    
    

  


      
          
  
      
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            cypx
  

      

      

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        Jun 5, 2025


      
    


  





      


        


  
    

      
          
Same issue, also on KDE Neon.


The gdb log:


Thread 1 "nextcloud" received signal SIGSEGV, Segmentation fault.
Downloading source file /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h
enumExtendMode (e=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77                                                                                                                        
warning: 77     /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h: No such file or directory
(gdb) bt
#0  enumExtendMode (e=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77
#1  enumExtendMode (e=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qmetaobject.cpp:3203
#2  QMetaEnum::valueToKey (this=0x7ffce5d252f0, value=0) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qmetaobject.cpp:3419
#3  0x00007917b0f1e8e4 in qt_QMetaEnum_debugOperator (dbg=..., value=0, meta=<optimized out>, name=<optimized out>) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/io/qdebug.cpp:1470
#4  0x00007917bff8d221 in OCC::ProcessDirectoryJob::processFile(OCC::ProcessDirectoryJob::PathTuple, OCC::LocalInfo const&, OCC::RemoteInfo const&, OCC::SyncJournalFileRecord const&) () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#5  0x00007917bff8f4ae in OCC::ProcessDirectoryJob::process() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#6  0x00007917b0e77a99 in QtPrivate::QSlotObjectBase::call (a=0x7ffce5d25840, r=<optimized out>, this=0x5d3af8ed03e0, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#7  doActivate<false> (sender=0x5d3af84b0150, signal_index=5, argv=0x7ffce5d25840) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
#8  0x00007917bff0615c in OCC::DiscoverySingleDirectoryJob::finished(OCC::Result<QList<OCC::RemoteInfo>, OCC::HttpError> const&) () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#9  0x00007917bff9bbe8 in OCC::DiscoverySingleDirectoryJob::lsJobFinishedWithoutErrorSlot() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#10 0x00007917b0e77a99 in QtPrivate::QSlotObjectBase::call (a=0x7ffce5d25978, r=<optimized out>, this=0x5d3af8d2b090, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#11 doActivate<false> (sender=0x5d3af8c8a870, signal_index=9, argv=0x7ffce5d25978) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
#12 0x00007917b0e77a99 in QtPrivate::QSlotObjectBase::call (a=0x7ffce5d25a48, r=<optimized out>, this=0x79174809a060, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#13 doActivate<false> (sender=0x7ffce5d25c90, signal_index=6, argv=0x7ffce5d25a48) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
#14 0x00007917bffd8338 in OCC::LsColXMLParser::parse(QByteArray const&, QHash<QString, OCC::ExtraFolderInfo>*, QString const&) () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#15 0x00007917bffd9761 in OCC::LsColJob::finished() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#16 0x00007917bffcb3d8 in OCC::AbstractNetworkJob::slotFinished() () at /lib/x86_64-linux-gnu/libnextcloudsync.so.0
#17 0x00007917b0e77a99 in QtPrivate::QSlotObjectBase::call (a=0x7ffce5d25fd8, r=<optimized out>, this=0x5d3af8537150, this=<optimized out>, r=<optimized out>, a=<optimized out>)
    at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobjectdefs_impl.h:461
#18 doActivate<false> (sender=0x5d3af8b98250, signal_index=12, argv=0x7ffce5d25fd8) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:4138
#19 0x00007917b0e00b3d in QObject::event (this=0x5d3af8b98250, e=0x791748099f20) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qobject.cpp:1431
#20 0x00007917bf60551d in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5d3af8b98250, e=0x791748099f20) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/widgets/kernel/qapplication.cpp:3301
#21 0x00007917b0eb0dd0 in QCoreApplication::notifyInternal2 (receiver=0x5d3af8b98250, event=0x791748099f20) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qcoreapplication.cpp:1106
#22 0x00007917b0eb0e1d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qcoreapplication.cpp:1546
#23 0x00007917b0eb116b in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x5d3af7d8f450) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qcoreapplication.cpp:1879
#24 0x00007917b0c6209f in postEventSourceDispatch (s=0x5d3af7dfde60) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qeventdispatcher_glib.cpp:246
#25 0x00007917b116c5c5 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007917b11cb737 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007917b116ba63 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007917b0c60b3f in QEventDispatcherGlib::processEvents (this=0x5d3af7d913f0, flags=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#29 0x00007917b0ebb4bb in QEventLoop::exec (this=0x7ffce5d26420, flags=...) at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77
#30 0x00007917b0eb405f in QCoreApplication::exec () at /usr/src/qt6-base-6.9.0-0zneon+24.04+noble+release+build112/src/corelib/global/qflags.h:77
#31 0x00005d3add9a3b14 in ??? ()
#32 0x00007917b022a1ca in __libc_start_call_main (main=main@entry=0x5d3add9a3700, argc=argc@entry=1, argv=argv@entry=0x7ffce5d267e8) at ../sysdeps/nptl/libc_start_call_main.h:58
#33 0x00007917b022a28b in __libc_start_main_impl (main=0x5d3add9a3700, argc=1, argv=0x7ffce5d267e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffce5d267d8) at ../csu/libc-start.c:360
#34 0x00005d3adda052b5 in ??? ()


      		
    

  





        


            

            
            

              
            

        

      


      

            
  
  

    
  
    
    

  

  

  


    












      

  
            







      

  
      



  

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            nilsding
  

      

      

      commented


        Jun 5, 2025


      
    


  





      


        


  
    

      
          
which exact package from what repo are you using?


From what I can tell KDE Neon has 3.16.0 in their repos: https://archive.neon.kde.org/stable/pool/main/n/nextcloud-desktop/


and Ubuntu noble (which the Neon release is built on) only provides Qt 6.4: https://packages.ubuntu.com/noble/libqt6core6t64


if you installed the client from the nextcloud-devs PPA: the client in there was built with Qt 6.4 for noble, so I'd guess that there were a couple internal changes done to Qt itself which could explain that segfault...

      		
    

  





        


            

            
            

              
            

        

      


      

            
  
  

    
  
    
    

  

  

  


    












      

  
            







      

  
      



  

  @cypx





  


    

      

  

    

        
    
    

  


      
          
  
      
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            cypx
  

      

      

      commented


        Jun 5, 2025


      
    


  





      


        


  
    

      
          
I use the nextcloud-devs PPA package


Package: nextcloud-client
Version: 3.16.4-20250429.181655.0febbee77-1.0~noble1
Priority: optional
Section: oldlibs
Source: nextcloud-desktop
Maintainer: ownCloud for Debian maintainers <[email protected]>
Installed-Size: 174 kB
Depends: nextcloud-desktop (= 3.16.4-20250429.181655.0febbee77-1.0~noble1), nextcloud-desktop-cmd (= 3.16.4-20250429.181655.0febbee77-1.0~noble1), nextcloud-desktop-doc (= 3.16.4-20250429.181655.0febbee77-1.0~noble1)
Download-Size: 156 kB
APT-Manual-Installed: yes
APT-Sources: https://ppa.launchpadcontent.net/nextcloud-devs/client/ubuntu noble/main amd64 Packages
Description: Nextcloud folder synchronization tool (transitional package)


      		
    

  





        


            

            
            

              
            

        

      


      

            
  
  

    
  
    
    

  

  

  


    












      

  
            







      

  
      



  

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            cypx
  

      

      

      commented


        Jun 5, 2025


      
    


  





      


        


  
    

      
          
Switch back to the package provided by KDE Neon fix the problem.


Package: nextcloud-desktop
Version: 3.16.0-1+24.04+noble+release+build2
Priority: optional
Section: net
Maintainer: Neon CI <[email protected]>
Installed-Size: 6 120 kB
Depends: libnextcloudsync0t64 (= 3.16.0-1+24.04+noble+release+build2), libqt6sql6-sqlite, nextcloud-desktop-common, nextcloud-desktop-l10n, kf6-karchive (>= 6.13.0), kf6-kguiaddons (>= 6.13.0), libc6 (>= 2.34), libcloudproviders0 (>= 0.3.3), libgcc-s1 (>= 3.3.1), libglib2.0-0t64 (>= 2.38.0), libqt6keychain1 (>= 0.14.3), libssl3t64 (>= 3.0.0), libstdc++6 (>= 13.1), qt6-base (>= 6.8.3), qt6-declarative (>= 6.8.3), qt6-svg (>= 6.8.3), qt6-webengine (>= 6.8.3)
Recommends: nextcloud-desktop-doc
Homepage: https://nextcloud.com/install/#install-clients
Download-Size: 2 620 kB
APT-Manual-Installed: yes
APT-Sources: http://archive.neon.kde.org/user noble/main amd64 Packages
Description: Nextcloud folder synchronization tool
 The Nextcloud desktop app lets you always have your latest files wherever
 you are. Just specify one or more folders on the local machine to and a server
 to synchronize to. You can configure more computers to synchronize to the same
 server and any change to the files on one computer will silently and reliably
 flow across to every other.
 .
 nextcloud-desktop provides the graphical client specialising in
 synchronizing with cloud storage provided by Nextcloud.



Thanks, I didn't notice KDE Neon now provide up to date package.

      		
    

  





        


            

            
            

              
            

        

      


      

            
  
  

    
  
    
    

  

  

  


    












      

  
      



  

  @mgallien





  


    

      

  

    

        
    
    

  


      
          
  
      
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            mgallien
  

      

      

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        Jun 5, 2025


      
    


  





      


        


  
    

      
          
@cypx thanks for checking and finding the solution

closing the issue now

      		
    

  





        


            

            
            

              
            

        

      


      

            
  
  

    
  
    
    

  

  

  


    












      

  
            

    

      
    

    


      

          @mgallien
mgallien




            closed this as completed


      Jun 5, 2025

    

  


    











  
  

    

      

  





  




  
  

              

  
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