Thank you for reporting this bug to Ubuntu.
Ubuntu 15.10 (wily) reached end-of-life on July 28, 2016.
See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases
We appreciate that this bug may be old and you might not be interested
in discussing it any more. But
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gedit (Ubuntu)
Status: New => Confirmed
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Same file takes a longer time to load with nano in a terminal window,
but no crash and no message about not getting enough memory to use.
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