Encounted a crash: ... ::: REGISTERING CLIP TO BIN::::: :::::::::::::::::::::: REGISTRATION 35 ptr count 8 qml: loaded clip: 3143 , ID: 35 , index: 0 , TYPE: Video qml: loaded clip with Astream: -1 terminate called after throwing an instance of 'std::out_of_range' what(): _Map_base::at [1]+ Aborted /opt/kdenlive-master-208-linux-64-gcc.AppImage when re-adding a video clip from bin to timeline where the clip was repeatedly changed on filesystem. The video got replaced by one-second video, then back to original length. I saw the clip's segment shrink to 1 second in the timeline, but after deleting and attempting to re-add it Kdenlive crashed.
After Kdenlive restart it offered to recover session. Repeating the actions in the recovered session worked properly.