SUMMARY
Kdenlive crashes when you try to stabilize video or save title clip.

STEPS TO REPRODUCE
stabiiznig crash
1. Pick some video and try to stabilize
title clip crash
1. make some title clip
2. try to save it

OBSERVED RESULT
log:
Model size of -3 is less than 0
Loading bin playlist...
retain is valid
playlist is valid
init bin
Found  3 clips
dealing with bin clip 0
clip id "2"
Loaded clip  "2" under id "2"
dealing with bin clip 1
clip id "3"
Loaded clip  "3" under id "3"
dealing with bin clip 2
clip id "4"
Loaded clip  "4" under id "4"
//////////////////////
Trying to construct 5 tracks.
////////////////////////////////
Looking for clip clip  4  =  
 // /REQUEST TL CLP REGSTR:  7 
--------
CLIPS COUNT:  0
REGISTRATION  7 ptr count 3
// GOT CLIP STACK DATA CHANGE:  QVector(298)
// EFFECT  0  :  deinterlace
// EFFECT  1  :  fieldorder
// EFFECT  2  :  movit.crop
// EFFECT  3  :  movit.resample
// EFFECT  4  :  movit.resize
// EFFECT  5  :  swresample
// EFFECT  6  :  resample
// EFFECT  7  :  data_feed
// EFFECT  8  :  movit.convert
// EFFECT  9  :  avcolor_space
// EFFECT  10  :  audioconvert
Inserted clip in track 6 at  0
Looking for clip clip  4  =  
 // /REQUEST TL CLP REGSTR:  11 
--------
CLIPS COUNT:  1
REGISTRATION  11 ptr count 3
// GOT CLIP STACK DATA CHANGE:  QVector(298)
// EFFECT  0  :  deinterlace
// EFFECT  1  :  fieldorder
// EFFECT  2  :  movit.crop
// EFFECT  3  :  movit.resample
// EFFECT  4  :  movit.resize
// EFFECT  5  :  swresample
// EFFECT  6  :  resample
// EFFECT  7  :  data_feed
// EFFECT  8  :  movit.convert
// EFFECT  9  :  avcolor_space
// EFFECT  10  :  audioconvert
Inserted clip in track 10 at  0
qml: keyframe model changed............
qml: loaded clip:  0 , ID:  11 , index:  0 , TYPE: AV
qml: keyframe model changed............
qml: loaded clip:  0 , ID:  7 , index:  3 , TYPE: AV
Error loading zones : Json file should be an array
Error loading zones : Json file should be an array
Error loading zones : Json file should be an array
################### JOB finished 1
################### JOB finished 3
################### JOB finished 5
[IMGUTILS @ 0x7f684a710630] Picture size 0x0 is invalid
[IMGUTILS @ 0x7f684a710640] Picture size 0x0 is invalid
[IMGUTILS @ 0x7f684a710640] Picture size 0x0 is invalid
[swscaler @ 0x7f680c13c0c0] 0x0 -> 0x0 is invalid scaling dimension
################### JOB finished 4
################### JOB finished 2
################### JOB finished 0
+++++
INVALID RESULT IMAGE
++++++++++++++
/////////// requestAddBinClip "-1"
/////////// found id "5"
/////////// constructed 
/////////// added  true
################### JOB finished 6
################### loadjob COMMIT
################### ProjectClip::setproducer
################### ClipController::updateProducer
################### ClipController::addmasterproducer
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::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
Aborted (core dumped)


EXPECTED RESULT
not crashing wtf

SOFTWARE/OS VERSIONS

System:    Host: PowerBlaster Kernel: 5.2.6-arch1-1-ARCH x86_64 bits: 64 Desktop: Xfce 4.13.6 Distro: Arch Linux 
Machine:   Type: Laptop System: LENOVO product: 81BG v: Lenovo ideapad 320-15IKB serial: PF0VE8NR 
           Mobo: LENOVO model: LNVNB161216 v: SDK0J40709 WIN serial: PF0VE8NR UEFI: LENOVO v: 6JCN13WW date: 09/08/2017 
Battery:   ID-1: BAT0 charge: 32.8 Wh condition: 32.9/33.3 Wh (99%) 
CPU:       Topology: Quad Core model: Intel Core i5-8250U bits: 64 type: MT MCP L2 cache: 6144 KiB 
           Speed: 3330 MHz min/max: 400/3400 MHz Core speeds (MHz): 1: 3330 2: 3308 3: 3356 4: 3400 5: 3345 6: 3400 7: 3348 
           8: 3398 
Graphics:  Device-1: Intel UHD Graphics 620 driver: i915 v: kernel 
           Device-2: NVIDIA GP108M [GeForce MX150] driver: nvidia v: 430.40 
           Display: server: X.org 1.20.5 driver: none resolution: <xdpyinfo missing> 
           OpenGL: renderer: GeForce MX150/PCIe/SSE2 v: 4.6.0 NVIDIA 430.40 
Audio:     Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel 
           Sound Server: ALSA v: k5.2.6-arch1-1-ARCH 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: 54:e1:ad:7d:aa:14 
           Device-2: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter driver: ath10k_pci 
           IF: wlp3s0 state: up mac: f8:28:19:de:79:39 
           Device-3: Qualcomm Atheros type: USB driver: btusb 
Drives:    Local Storage: total: 1.14 TiB used: 868.48 GiB (74.2%) 
           ID-1: /dev/sda vendor: LITE-ON model: CV3-DE256 size: 238.47 GiB 
           ID-2: /dev/sdb type: USB vendor: Toshiba model: MQ04ABF100 size: 931.51 GiB 
RAID:      Hardware-1: Intel 82801 Mobile SATA Controller [RAID mode] driver: ahci 
Partition: ID-1: / size: 54.43 GiB used: 37.88 GiB (69.6%) fs: ext4 dev: /dev/sda6 
           ID-2: /home size: 153.22 GiB used: 111.48 GiB (72.8%) fs: ext4 dev: /dev/sda3 
Sensors:   System Temperatures: cpu: 57.5 C mobo: N/A gpu: nvidia temp: 54 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 306 Uptime: 2h 39m Memory: 7.70 GiB used: 3.13 GiB (40.7%) Shell: bash inxi: 3.0.36