Created attachment 120568 [details]
old project which crashes kdenlive when using substitute clips

SUMMARY
Kdenlive is normally backwards compatible in my experience, but Kdenlive crashes when loading this old project file if I don't load all of the missing clips. 

While attempting to load this project, if you select 'use substitute clips" to get past the missing clip dialog box, the program will crash before loading the file. 

STEPS TO REPRODUCE
1. Load the attached Kdenlive project file
2. Try "use substitute clips" when loading up the project


OBSERVED RESULT
Experience a KDenlive crash

EXPECTED RESULT
Kdenlive opens the project normally with substitute clips

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Manjaro Linux
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Inserted clip in track 132 at  7240
Both point size and pixel size set. Using pixel size.
Both point size and pixel size set. Using pixel size.
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::setRenderHint: Painter must be active to set rendering hints
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
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::save: Painter not active
Abandon (core dumped)