Package: kdenlive
Version: 19.08.1-2
Followup-For: Bug #934038

Dear Maintainer,

I'm be able to reproduce this error following the OP steps:

1.- Open Kdenlive.
2.- Add a title clip.
3.- Create a text label.
4.- Press OK

I get the same error and Kdenlive die.

I attach debug info and backtrace:

---
:~$ gdb kdenlive
GNU gdb (Debian 8.3-1) 8.3
Copyright (C) 2019 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.
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Type "show configuration" for configuration details.
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<http://www.gnu.org/software/gdb/bugs/>.
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    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from kdenlive...
Reading symbols from /usr/lib/debug/.build-
id/98/a3e4a1cb2ea19fe8b08e997af4a2532590b1fb.debug...
(gdb) run
Starting program: /usr/bin/kdenlive
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xabda0b40 (LWP 5927)]
[New Thread 0xaaba3b40 (LWP 5928)]
[New Thread 0xa9299b40 (LWP 5929)]
[New Thread 0xa88ffb40 (LWP 5930)]
[New Thread 0xa78ebb40 (LWP 5931)]
WARNING : Fails to parse  "avcolour_space"
WARNING : Fails to parse  "avcolor_space"
WARNING : Fails to parse  "avdeinterlace"
WARNING : Fails to parse  "swscale"
"avfilter.abench" is blacklisted
"avfilter.acompressor" is blacklisted
"avfilter.adelay" is blacklisted
"avfilter.aecho" is blacklisted
"avfilter.aemphasis" is blacklisted
"avfilter.aeval" is blacklisted
"avfilter.afade" is blacklisted
"avfilter.afftfilt" is blacklisted
"avfilter.agate" is blacklisted
"avfilter.ametadata" is blacklisted
"avfilter.arealtime" is blacklisted
"avfilter.ashowinfo" is blacklisted
"avfilter.channelmap" is blacklisted
"avfilter.chorus" is blacklisted
"avfilter.earwax" is blacklisted
"avfilter.volume" is blacklisted
"avfilter.volumedetect" is blacklisted
"avfilter.ass" is blacklisted
"avfilter.atadenoise" is blacklisted
"avfilter.avgblur" is blacklisted
"avfilter.bbox" is blacklisted
"avfilter.bench" is blacklisted
"avfilter.blackdetect" is blacklisted
"avfilter.blackframe" is blacklisted
"avfilter.boxblur" is blacklisted
"avfilter.bwdif" is blacklisted
"avfilter.chromakey" is blacklisted
"avfilter.colorkey" is blacklisted
"avfilter.colormatrix" is blacklisted
"avfilter.colorspace" is blacklisted
"avfilter.convolution" is blacklisted
"avfilter.crop" is blacklisted
"avfilter.cropdetect" is blacklisted
"avfilter.curves" is blacklisted
"avfilter.datascope" is blacklisted
"avfilter.dctdnoiz" is blacklisted
"avfilter.deband" is blacklisted
"avfilter.deflate" is blacklisted
"avfilter.deinterlace_vaapi" is blacklisted
"avfilter.deshake" is blacklisted
"avfilter.despill" is blacklisted
"avfilter.doubleweave" is blacklisted
"avfilter.drawbox" is blacklisted
"avfilter.drawgraph" is blacklisted
"avfilter.drawgrid" is blacklisted
"avfilter.drawtext" is blacklisted
"avfilter.elbg" is blacklisted
"avfilter.eq" is blacklisted
"avfilter.fade" is blacklisted
"avfilter.field" is blacklisted
"avfilter.fieldhint" is blacklisted
"avfilter.fieldorder" is blacklisted
"avfilter.find_rect" is blacklisted
"avfilter.floodfill" is blacklisted
"avfilter.fspp" is blacklisted
"avfilter.gblur" is blacklisted
"avfilter.geq" is blacklisted
"avfilter.hflip" is blacklisted
"avfilter.hqdn3d" is blacklisted
"avfilter.hqx" is blacklisted
"avfilter.hue" is blacklisted
"avfilter.hwdownload" is blacklisted
"avfilter.idet" is blacklisted
"avfilter.il" is blacklisted
"avfilter.lenscorrection" is blacklisted
"avfilter.loop" is blacklisted
"avfilter.lumakey" is blacklisted
"avfilter.lut" is blacklisted
"avfilter.lutrgb" is blacklisted
"avfilter.lutyuv" is blacklisted
"avfilter.mcdeint" is blacklisted
"avfilter.metadata" is blacklisted
"avfilter.negate" is blacklisted
"avfilter.nlmeans" is blacklisted
"avfilter.nnedi" is blacklisted
"avfilter.owdenoise" is blacklisted
"avfilter.pad" is blacklisted
"avfilter.perspective" is blacklisted
"avfilter.phase" is blacklisted
"avfilter.pixscope" is blacklisted
"avfilter.pp" is blacklisted
"avfilter.pp7" is blacklisted
"avfilter.prewitt" is blacklisted
"avfilter.realtime" is blacklisted
"avfilter.removegrain" is blacklisted
"avfilter.removelogo" is blacklisted
"avfilter.roberts" is blacklisted
"avfilter.rotate" is blacklisted
"avfilter.scale_vaapi" is blacklisted
"avfilter.showinfo" is blacklisted
"avfilter.shuffleframes" is blacklisted
"avfilter.sidedata" is blacklisted
"avfilter.signalstats" is blacklisted
"avfilter.sobel" is blacklisted
"avfilter.stereo3d" is blacklisted
"avfilter.super2xsai" is blacklisted
"avfilter.swapuv" is blacklisted
"avfilter.tblend" is blacklisted
"avfilter.tlut2" is blacklisted
"avfilter.tonemap" is blacklisted
"avfilter.transpose" is blacklisted
"avfilter.vectorscope" is blacklisted
"avfilter.vflip" is blacklisted
"avfilter.vignette" is blacklisted
"avfilter.vmafmotion" is blacklisted
"avfilter.w3fdif" is blacklisted
"avfilter.xbr" is blacklisted
"avfilter.yadif" is blacklisted
"avfilter.zmq" is blacklisted
"avfilter.zoompan" is blacklisted
WARNING : Fails to parse  "swresample"
"gtkrescale" is blacklisted
WARNING : Fails to parse  "glsl.manager"
WARNING : Fails to parse  "movit.convert"
WARNING : Fails to parse  "movit.crop"
WARNING : Fails to parse  "movit.resample"
WARNING : Fails to parse  "movit.resize"
"resample" is blacklisted
WARNING : Fails to parse  "deinterlace"
"rgblut" is blacklisted
"spot_remover" is blacklisted
"text" is blacklisted
"timer" is blacklisted
WARNING : Fails to parse  "jack"
"jackrack" is blacklisted
WARNING : Fails to parse  "telecide"
"frei0r.3dflippo" is blacklisted
"frei0r.bluescreen0r" is blacklisted
"frei0r.bw0r" is blacklisted
"frei0r.gamma" is blacklisted
"frei0r.invert0r" is blacklisted
"frei0r.rgbsplit0r" is blacklisted
"frei0r.transparency" is blacklisted
"frei0r.vertigo" is blacklisted
WARNING : Fails to parse  "audiochannels"
WARNING : Fails to parse  "audioconvert"
WARNING : Fails to parse  "data_feed"
"data_show" is blacklisted
WARNING : Fails to parse  "imageconvert"
"mask_apply" is blacklisted
"mask_start" is blacklisted
"mono" is blacklisted
"region" is blacklisted
"resize" is blacklisted
"transition" is blacklisted
"watermark" is blacklisted
"videostab" is blacklisted
"videostab2" is blacklisted
"qtext" is blacklisted
"motion_est" is blacklisted
WARNING : Fails to parse  "crop_detect"
++++++ Unknown asset :  "avfilter.acompressor"
++++++ Unknown asset :  "avfilter.aecho"
++++++ Unknown asset :  "avfilter.agate"
Warning: duplicate custom definition of effect "frei0r.alpha0ps" found. Only
last one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_alpha0ps.xml"
Warning: duplicate custom definition of effect "frei0r.balanc0r" found. Only
last one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_balanc0r.xml"
Warning: duplicate custom definition of effect "frei0r.curves" found. Only last
one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_curves.xml"
Warning: duplicate custom definition of effect "frei0r.levels" found. Only last
one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_levels.xml"
Warning: duplicate custom definition of effect "frei0r.lightgraffiti" found.
Only last one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_lightgraffiti.xml"
Warning: duplicate custom definition of effect "frei0r.select0r" found. Only
last one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_select0r.xml"
Warning: duplicate custom definition of effect "frei0r.sopsat" found. Only last
one will be considered. Duplicate found in
"/usr/share/kdenlive/effects/frei0r_sopsat.xml"
++++++ Unknown asset :  "frei0r.tehRoxx0r"
++++++ Unknown asset :  "frei0r.vertigo"
++++++ Unknown asset :  "frei0r.vertigo"
++++++ Unknown asset :  "movit.unsharp_mask"
Warning: duplicate custom definition of effect "qtblend" found. Only last one
will be considered. Duplicate found in
"/usr/share/kdenlive/effects/qtblend.xml"
++++++ Unknown asset :  "region"
++++++ Unknown asset :  "timewarp"
++++++ Unknown asset :  "opencv.tracker"
"frei0r.alphainjection" is blacklisted
"frei0r.blend" is blacklisted
"frei0r.composition" is blacklisted
"frei0r.xfade0r" is blacklisted
[New Thread 0x9ba31b40 (LWP 5935)]
defaultServiceProvider::requestService(): no service found for - "org.qt-
project.qt.audiosource"
[New Thread 0x9a69bb40 (LWP 5936)]
"0 instead of 1 arguments to message {%1 fps} supplied before conversion."
[New Thread 0x99bffb40 (LWP 5937)]
"0 instead of 1 arguments to message {%1 fps} supplied before conversion."
[New Thread 0x988bdb40 (LWP 5938)]
[New Thread 0x9767cb40 (LWP 5939)]
[New Thread 0x962ffb40 (LWP 5940)]
[New Thread 0x95afeb40 (LWP 5941)]
[New Thread 0x946ffb40 (LWP 5942)]
QWidget::setMinimumSize: (effect_list/QDockWidget) Negative sizes (0,-1) are
not possible
QWidget::setMinimumSize: (transition_list/QDockWidget) Negative sizes (0,-1)
are not possible
Loading bin playlist...
//////////////////////
Trying to construct 5 tracks.
////////////////////////////////
SUSPICIOUS: we weren't expecting a producer when parsing the timeline
[New Thread 0x804e0b40 (LWP 5943)]
[New Thread 0x8049fb40 (LWP 5944)]
[New Thread 0x92263b40 (LWP 5945)]
[New Thread 0x7f6ffb40 (LWP 5946)]
[New Thread 0x7ecb4b40 (LWP 5947)]
[New Thread 0x7dd36b40 (LWP 5948)]
[New Thread 0x7cfc9b40 (LWP 5949)]
[New Thread 0x681f5b40 (LWP 5951)]
/////////// requestAddBinClip "-1"
/////////// found id "2"
/////////// constructed
/////////// added  true
[New Thread 0x66982b40 (LWP 5954)]
################### JOB finished 0
################### loadjob COMMIT
################### ProjectClip::setproducer
################### ClipController::updateProducer
################### ClipController::addmasterproducer
QPoint(0,124)
[Thread 0x8049fb40 (LWP 5944) exited]
[Thread 0x681f5b40 (LWP 5951) exited]
[Thread 0x804e0b40 (LWP 5943) exited]
[Thread 0x7cfc9b40 (LWP 5949) exited]
[New Thread 0x804e0b40 (LWP 5955)]
[New Thread 0x7cfc9b40 (LWP 5956)]
MUTEX LOCK!!!!!!!!!!!! setmodel
MUTEX UNLOCK!!!!!!!!!!!! setmodel
MUTEX LOCK!!!!!!!!!!!! loadEffects:
QFSFileEngine::open: No file name specified
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::save: Painter not active
QPainter::setClipRect: Painter not active
QPainter::setWorldTransform: Painter not active
QPainter::opacity: Painter not active
QPainter::worldTransform: Painter not active
QPainter::setWorldTransform: Painter not active
QPainter::save: Painter not active
QPainter::setOpacity: Painter not active
QPainter::setPen: Painter not active
QPainter::setBrush: Painter not active
QPainter::drawRects: Painter not active
QPainter::restore: Unbalanced save/restore
QPainter::setWorldTransform: Painter not active
QPainter::save: Painter not active
QPainter::setOpacity: Painter not active
QPainter::fillPath: Painter not active
QPainter::restore: Unbalanced save/restore
QPainter::setWorldTransform: Painter not active
QPainter::setOpacity: Painter not active
QPainter::restore: Unbalanced save/restore
QPainter::end: Painter not active, aborted
ASSERT: "mImg == qImg->constBits()" in file common.cpp, line 63

Thread 23 "Thread (pooled)" received signal SIGABRT, Aborted.
[Switching to Thread 0x66982b40 (LWP 5954)]
0xb7fd5871 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fd5871 in __kernel_vsyscall ()
#1  0xb4ae9ee2 in __libc_signal_restore_set (set=0x6698188c)
    at ../sysdeps/unix/sysv/linux/internal-signals.h:84
#2 0xb4ae9ee2 in __GI_raise (sig=6) at ../sysdeps/unix/sysv/linux/raise.c:48
#3  0xb4ad42bd in __GI_abort () at abort.c:79
#4  0xb4feeb10 in  () at /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#5  0xb4fee199 in qt_assert_x(char const*, char const*, char const*, int) ()
    at /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#6  0x9f29ed37 in  () at /usr/lib/i386-linux-gnu/mlt/libmltqt.so
#7  0x9f2b2484 in drawKdenliveTitle ()
    at /usr/lib/i386-linux-gnu/mlt/libmltqt.so
#8  0x9f2a2bf5 in  () at /usr/lib/i386-linux-gnu/mlt/libmltqt.so
#9 0xb70ff558 in mlt_frame_get_image () at /usr/lib/i386-linux-gnu/libmlt.so.6 #10 0xb70df7c8 in Mlt::Frame::get_image(mlt_image_format&, int&, int&, int) ()
    at /usr/lib/i386-linux-gnu/libmlt++.so.3
#11 0x006be912 in KThumb::getFrame(Mlt::Frame*, int, int, bool)
    (frame=0x7d42ef50, width=<optimized out>, height=<optimized out>,
forceRescale=false) at ./src/doc/kthumb.cpp:114
#12 0x00740ae3 in ThumbJob::startJob() (this=0x40436fc)
    at ./src/jobs/thumbjob.cpp:107
#13 0x00726d6d in QtConcurrent::FunctionWrapper1<bool,
std::shared_ptr<AbstractClipJob>
const&>::operator()(std::shared_ptr<AbstractClipJob> const&)
    (this=0x7d491e38, u=std::shared_ptr<AbstractClipJob> (use count 2, weak
coun--Type <RET> for more, q to quit, c to continue without paging--c
t 0) = {...}) at /usr/include/i386-linux-
gnu/qt5/QtConcurrent/qtconcurrentfunctionwrappers.h:78
#14 0x00726d6d in
QtConcurrent::MappedEachKernel<__gnu_cxx::__normal_iterator<std::shared_ptr<AbstractClipJob>
const*, std::vector<std::shared_ptr<AbstractClipJob>,
std::allocator<std::shared_ptr<AbstractClipJob> > > >,
QtConcurrent::FunctionWrapper1<bool, std::shared_ptr<AbstractClipJob> const&>
>::runIteration(__gnu_cxx::__normal_iterator<std::shared_ptr<AbstractClipJob>
const*, std::vector<std::shared_ptr<AbstractClipJob>,
std::allocator<std::shared_ptr<AbstractClipJob> > > >, int, bool*)
(result=0x3069e60, it=..., this=0x7d491e10) at /usr/include/i386-linux-
gnu/qt5/QtConcurrent/qtconcurrentmapkernel.h:175
#15 0x00726d6d in
QtConcurrent::MappedEachKernel<__gnu_cxx::__normal_iterator<std::shared_ptr<AbstractClipJob>
const*, std::vector<std::shared_ptr<AbstractClipJob>,
std::allocator<std::shared_ptr<AbstractClipJob> > > >,
QtConcurrent::FunctionWrapper1<bool, std::shared_ptr<AbstractClipJob> const&>
>::runIterations(__gnu_cxx::__normal_iterator<std::shared_ptr<AbstractClipJob>
const*, std::vector<std::shared_ptr<AbstractClipJob>,
std::allocator<std::shared_ptr<AbstractClipJob> > > >, int, int, bool*)
(this=0x7d491e10, sequenceBeginIterator=std::shared_ptr<AbstractClipJob> (use
count 2, weak count 0) = {get() = 0x40436fc}, begin=0, end=1,
results=0x3069e60) at /usr/include/i386-linux-
gnu/qt5/QtConcurrent/qtconcurrentmapkernel.h:185
#16 0x00728d95 in
QtConcurrent::IterateKernel<__gnu_cxx::__normal_iterator<std::shared_ptr<AbstractClipJob>
const*, std::vector<std::shared_ptr<AbstractClipJob>,
std::allocator<std::shared_ptr<AbstractClipJob> > > >,
bool>::forThreadFunction() (this=0x7d491e10) at /usr/include/i386-linux-
gnu/qt5/QtCore/qarraydata.h:209
#17 0x007293b8 in virtual thunk to
QtConcurrent::IterateKernel<__gnu_cxx::__normal_iterator<std::shared_ptr<AbstractClipJob>
const*, std::vector<std::shared_ptr<AbstractClipJob>,
std::allocator<std::shared_ptr<AbstractClipJob> > > >, bool>::threadFunction()
() at /usr/include/c++/9/bits/shared_ptr_base.h:131
#18 0xb7264c46 in QtConcurrent::ThreadEngineBase::run() () at
/usr/lib/i386-linux-gnu/libQt5Concurrent.so.5
#19 0xb5032ad0 in  () at /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#20 0xb503b696 in  () at /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#21 0xb4408fb9 in start_thread (arg=<optimized out>) at pthread_create.c:486
#22 0xb4bb2dc6 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108
(gdb)
---


If you need more info, don't hesitate requesting it.


Thanks.



-- System Information:
Debian Release: bullseye/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 5.2.0-2-686-pae (SMP w/2 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=es_ES.utf8, LC_CTYPE=es_ES.utf8 (charmap=UTF-8), LANGUAGE=es_ES.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages kdenlive depends on:
ii  ffmpeg                         7:4.1.4-1+b2
ii  kded5                          5.62.0-1
ii  kdenlive-data                  19.08.1-2
ii  kinit                          5.62.0-1
ii  kio                            5.54.1-1
ii  libc6                          2.29-2
ii  libgcc1                        1:9.2.1-8
ii  libkf5archive5                 5.62.0-1
ii  libkf5bookmarks5               5.54.0-1
ii  libkf5completion5              5.54.0-1
ii  libkf5configcore5              5.62.0-1
ii  libkf5configgui5               5.62.0-1
ii  libkf5configwidgets5           5.54.0-1
ii  libkf5coreaddons5              5.62.0-1
ii  libkf5crash5                   5.62.0-1
ii  libkf5dbusaddons5              5.62.0-1
ii  libkf5declarative5             5.54.0-1
ii  libkf5filemetadata3            5.62.0-1
ii  libkf5guiaddons5               5.62.0-1
ii  libkf5i18n5                    5.62.0-1
ii  libkf5iconthemes5              5.54.0-1
ii  libkf5itemviews5               5.62.0-1
ii  libkf5jobwidgets5              5.54.0-1
ii  libkf5kiocore5                 5.54.1-1
ii  libkf5kiofilewidgets5          5.54.1-1
ii  libkf5kiowidgets5              5.54.1-1
ii  libkf5newstuff5                5.54.0-2
ii  libkf5notifications5           5.62.0-1
ii  libkf5notifyconfig5            5.54.0-1
ii  libkf5purpose-bin              5.54.0-1
ii  libkf5purpose5                 5.54.0-1
ii  libkf5service-bin              5.62.0-1
ii  libkf5service5                 5.62.0-1
ii  libkf5solid5                   5.62.0-2
ii  libkf5widgetsaddons5           5.54.0-1
ii  libkf5xmlgui5                  5.54.0-1
ii  libmlt++3                      6.16.0-3
ii  libmlt6                        6.16.0-3
ii  libqt5concurrent5              5.11.3+dfsg1-4
ii  libqt5core5a                   5.11.3+dfsg1-4
ii  libqt5dbus5                    5.11.3+dfsg1-4
ii  libqt5gui5                     5.11.3+dfsg1-4
ii  libqt5multimedia5              5.11.3-2
ii  libqt5network5                 5.11.3+dfsg1-4
ii  libqt5qml5                     5.11.3-4
ii  libqt5quick5                   5.11.3-4
ii  libqt5quickwidgets5            5.11.3-4
ii  libqt5svg5                     5.11.3-3
ii  libqt5webkit5                  5.212.0~alpha2-21
ii  libqt5widgets5                 5.11.3+dfsg1-4
ii  libqt5xml5                     5.11.3+dfsg1-4
ii  librttr-core0.9.6              0.9.6+dfsg1-2
ii  libstdc++6                     9.2.1-8
ii  melt                           6.16.0-3
ii  qml-module-qtgraphicaleffects  5.11.3-2
ii  qml-module-qtqml-models2       5.11.3-4
ii  qml-module-qtquick-controls    5.11.3-2
ii  qml-module-qtquick-controls2   5.11.3+dfsg-2
ii  qml-module-qtquick-dialogs     5.11.3-2
ii  qml-module-qtquick-layouts     5.11.3-4
ii  qml-module-qtquick-window2     5.11.3-4
ii  qml-module-qtquick2            5.11.3-4

Versions of packages kdenlive recommends:
ii  breeze-icon-theme  4:5.62.0-1
ii  dvdauthor          0.7.2-1
ii  dvgrab             3.5+git20160707.1.e46042e-1+b1
ii  frei0r-plugins     1.6.1-4
ii  genisoimage        9:1.1.11-3+b2
ii  oxygen-icon-theme  5:5.62.0-1
ii  recordmydesktop    0.3.8.1+svn602-1.1
ii  swh-plugins        0.4.17-2

Versions of packages kdenlive suggests:
ii  khelpcenter  4:18.04.0-1

-- no debconf information

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