Andrew, I looked for it in my download area, in my Cinelerra email (which I always save), and in the archived mailing list and can not find that file. If you have it still, could you resend it?

Look for file named

0001-EXPERIMENTAL-better-fix-for-nested-edl-load-undo.patch*

It fixed crash I was seeing but added massive memory leak or something so we reverted that.

Thanks for all bisect work you did!