crash on '# + alphabetic'

Hi,
just wanted to report that when i open a rust file (.rs),
and enter # + any alphabetic character - it instantly crashes.
Tested on linux and windows 10 4.0.21.

Another bug is that the automatic indentation
fails when you use lifetimes in rust, since u use the ' character one time.

Last bug:
When i copy text from file to file on linux,
it crashes on pasting. Happens for not too big chunks of text.
I think 200+ lines are enough. My last test was a random file to copy,
make a new file, try to paste -> crash.
Doing it on windows works without any problems, tested with 1k+ lines.

Keep up the good work, editor is awsome.

Edited by Benno on Reason: accidently submitted
oh, and by linux i mean debian 'stretch'
Yep the current support for other languages is very experimental and Rust was the test case that proved it wasn't good enough. I didn't expect a crash though, that's good to know, thanks for letting me know.