pasting 'extremely' long lines of text can make gedit crash xorg,
causing a restart and losing any unsaved data/files/work

text was pasted from 'view page source' option in browser,
computer generated html from 'sitebuilder'

big ugly code with long lone lines and huge whitespace areas

bug #360535 seems related, but not as severe:
gedit performs very slowly, hogs a ton of memory, and crashes on large datasets without newlines



hth
ctl
aka jetscreamer