Crash on video export

[Rupert]

This problem occurs on Openshot 2.2 on several Linux machines and under Windows 10. It has also appeared with several video files. It does not appear with all video files, but it appears with enough of them to make it impossible to accomplish my project.

A usable workaround would be for Openshot to report which file is problematic. I suspect that repacking it would be enough

I am using Linux Mint 18.1 64 bit (although the problem also occurred on 18.0 and Mint 17) and the Appimage of Openshot 2.2.

Repro:
Using an otherwise correct looking project
Export video, accept default options.

Crash will occur. When running from terminal, following error message is given:
*** Error in `/tmp/.mount_e1aewR/usr/bin/launch': malloc(): smallbin double linked list corrupted: 0x00007fcebe994a00 ***

Followed by a lengthy backtrace.
The project bugtest2 https://app.box.com/s/o47lrj1b1f7xwd1hc4nld9bgewb2azn4
which uses only the video librecad2.mkv https://app.box.com/s/9z4b5ywsgfqytdd0msft1dcbbzx3mjgx

demonstrates the problem on my system

There is also occasionally a different crash, which appears to be related, when using larger projects. This was harder to create a minimal example.