Hi,

I'm also having this bug :

$ gdb digikam
GNU gdb (Debian 7.7.1+dfsg-3) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Type "show configuration" for configuration details.
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For help, type "help".
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Reading symbols from digikam...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/digikam
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffd0f7d700 (LWP 23380)]
[New Thread 0x7fffcadcc700 (LWP 23381)]
[New Thread 0x7fffca5cb700 (LWP 23382)]
Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QString)
Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QString)
[New Thread 0x7fffc9dca700 (LWP 23383)]
QSqlDatabasePrivate::removeDatabase: connection 'ConnectionTest' is
still in use, all queries will cease to work.
[Thread 0x7fffc9dca700 (LWP 23383) exited]
[New Thread 0x7fffc9dca700 (LWP 23385)]
[New Thread 0x7fffb5c0d700 (LWP 23393)]
[Thread 0x7fffb5c0d700 (LWP 23393) exited]
[New Thread 0x7fffb5c0d700 (LWP 23394)]
[New Thread 0x7fffb540c700 (LWP 23395)]
[New Thread 0x7fffb498a700 (LWP 23396)]
[New Thread 0x7fffabffe700 (LWP 23397)]
[New Thread 0x7fffab7fd700 (LWP 23398)]
[New Thread 0x7fffaaffc700 (LWP 23399)]
[New Thread 0x7fffaa7fb700 (LWP 23400)]
[New Thread 0x7fffa9ffa700 (LWP 23401)]
[New Thread 0x7fffa97f9700 (LWP 23402)]
[New Thread 0x7fffa8ff8700 (LWP 23403)]
[New Thread 0x7fff83fff700 (LWP 23404)]
[New Thread 0x7fff7bfff700 (LWP 23405)]
[New Thread 0x7fff837fe700 (LWP 23406)]
[New Thread 0x7fff82ffd700 (LWP 23407)]
[New Thread 0x7fff827fc700 (LWP 23408)]
[New Thread 0x7fff81ffb700 (LWP 23409)]
[New Thread 0x7fff817fa700 (LWP 23410)]
[New Thread 0x7fff80ff9700 (LWP 23411)]
[New Thread 0x7fff7b7fe700 (LWP 23412)]
[New Thread 0x7fff7affd700 (LWP 23413)]
[New Thread 0x7fff7a7fc700 (LWP 23414)]
[New Thread 0x7fff79ffb700 (LWP 23415)]
[New Thread 0x7fff797fa700 (LWP 23416)]
[New Thread 0x7fff78ff9700 (LWP 23417)]
[New Thread 0x7fff43fff700 (LWP 23418)]
[New Thread 0x7fff3bfff700 (LWP 23419)]
[New Thread 0x7fff437fe700 (LWP 23420)]
[New Thread 0x7fff42ffd700 (LWP 23421)]
[New Thread 0x7fff427fc700 (LWP 23422)]
[New Thread 0x7fff41ffb700 (LWP 23423)]
[New Thread 0x7fff417fa700 (LWP 23424)]
[New Thread 0x7fff40ff9700 (LWP 23425)]
[New Thread 0x7fff3b7fe700 (LWP 23426)]
[New Thread 0x7fff3affd700 (LWP 23427)]
[New Thread 0x7fff3a7fc700 (LWP 23428)]
[New Thread 0x7fff39ffb700 (LWP 23429)]
[New Thread 0x7fff397fa700 (LWP 23430)]
[New Thread 0x7fff38ff9700 (LWP 23431)]
[New Thread 0x7fff21f4b700 (LWP 23447)]
[Thread 0x7fffb540c700 (LWP 23395) exited]
[Thread 0x7fff83fff700 (LWP 23404) exited]
[Thread 0x7fffa8ff8700 (LWP 23403) exited]
[Thread 0x7fffa97f9700 (LWP 23402) exited]
[Thread 0x7fff7bfff700 (LWP 23405) exited]
[Thread 0x7fffab7fd700 (LWP 23398) exited]
[Thread 0x7fff397fa700 (LWP 23430) exited]
[Thread 0x7fff3bfff700 (LWP 23419) exited]
[Thread 0x7fff427fc700 (LWP 23422) exited]
[Thread 0x7fff39ffb700 (LWP 23429) exited]
[Thread 0x7fff3affd700 (LWP 23427) exited]
[Thread 0x7fff43fff700 (LWP 23418) exited]
[Thread 0x7fff3b7fe700 (LWP 23426) exited]
[Thread 0x7fff797fa700 (LWP 23416) exited]
[Thread 0x7fff437fe700 (LWP 23420) exited]
[Thread 0x7fffb498a700 (LWP 23396) exited]
[Thread 0x7fff78ff9700 (LWP 23417) exited]
[Thread 0x7fff837fe700 (LWP 23406) exited]
[Thread 0x7fffabffe700 (LWP 23397) exited]
[Thread 0x7fff82ffd700 (LWP 23407) exited]
[Thread 0x7fff3a7fc700 (LWP 23428) exited]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffaaffc700 (LWP 23399)]
0x00007fffedd216e5 in Exiv2::PreviewManager::getPreviewImage
(this=0x7fff98038fd0, properties=...)
    at preview.cpp:1157
1157    preview.cpp: No such file or directory.
(gdb) backtrace full
#0  0x00007fffedd216e5 in Exiv2::PreviewManager::getPreviewImage
(this=0x7fff98038fd0, properties=...)
    at preview.cpp:1157
        loader = <optimized out>
        buf = {pData_ = 0x7fffaaffb360 "\340\263\377\252\377\177", size_ = 0}
#1  0x00007ffff5c12902 in KExiv2Iface::KExiv2Previews::data
(this=0x7fffaaffb740, index=0)
    at ../../libkexiv2/kexiv2previews.cpp:170
        image = {properties_ = {mimeType_ = "", extension_ = "", size_
= 2868884432, width_ = 32767,
            height_ = 4158587685, id_ = 32767}, pData_ = 0x0, size_ = 0}
#2  0x00007ffff5c12a8b in KExiv2Iface::KExiv2Previews::image
(this=<optimized out>,
    index=<optimized out>) at ../../libkexiv2/kexiv2previews.cpp:187
        previewData = {static shared_null = {ref = {_q_value = 3570},
alloc = 0, size = 0,
            data = 0xc440b8 <QByteArray::shared_null+24> "", array =
""}, static shared_empty = {ref = {
              _q_value = 90}, alloc = 0, size = 0,
            data = 0x7ffff20cf7d8 <QByteArray::shared_empty+24> "",
array = ""}, d = 0x7fffaaffb6e0}
        image = <incomplete type>
#3  0x00007ffff551807b in
Digikam::ThumbnailCreator::createThumbnail(Digikam::ThumbnailInfo
const&, QRect const&) const () from
/usr/lib/digikam/libdigikamcore.so.4.3.0
No symbol table info available.
#4  0x00007ffff551bcf9 in Digikam::ThumbnailCreator::load(QString
const&, QRect const&, bool) const ()
   from /usr/lib/digikam/libdigikamcore.so.4.3.0
No symbol table info available.
#5  0x00007ffff551c690 in
Digikam::ThumbnailCreator::pregenerate(QString const&) const ()
   from /usr/lib/digikam/libdigikamcore.so.4.3.0
No symbol table info available.
#6  0x00007ffff552b380 in ?? () from /usr/lib/digikam/libdigikamcore.so.4.3.0
No symbol table info available.
#7  0x00007ffff5500b8e in Digikam::LoadSaveThread::run() () from
/usr/lib/digikam/libdigikamcore.so.4.3.0
No symbol table info available.
#8  0x00007ffff55352ee in Digikam::DynamicThread::DynamicThreadPriv::run() ()
   from /usr/lib/digikam/libdigikamcore.so.4.3.0
No symbol table info available.
#9  0x00007ffff1c528a4 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#10 0x00007ffff1c5f3ff in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#11 0x00007fffecb1d0a4 in start_thread (arg=0x7fffaaffc700) at
pthread_create.c:309
        __res = <optimized out>
        pd = 0x7fffaaffc700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140736062277376,
28695976040299091, 1,
                140737354125408, 1, 140736062277376,
-28526649245074861, -28662390387672493},
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0,
0x0}, data = {prev = 0x0,
              cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
---Type <return> to continue, or q <return> to quit---
        __PRETTY_FUNCTION__ = "start_thread"
#12 0x00007ffff0e80c2d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

I'm not sure, but it seems to occur only in directories containing
video files, like .mov and/or .mp4.

Regards,

Sébastien

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