It seems to be caused by the "ChangeBar" patches to Scintilla we're using. It is not crashing on my machine, but uses a lot of memory, so I guess if you look in dmesg you'll see an OoM message. You can improve the testing time of this by disabling swap. Without swap when you get out of memory you'll get a direct crash. If you want to prevent crashes but you have a lot of time you could setup bigger swap.
I'm not sure how to resolve the problem, I'm not really familiar with the patch and should investigate it.