Really weird behavior with terminals/sessions in past couple weeks

[Ngie Cooper (yaneurabeya)]

> On May 13, 2017, at 11:05, Ngie Cooper (yaneurabeya) <yaneurabeya at gmail.com> wrote:
> 
> 
>> On May 13, 2017, at 11:01, Ngie Cooper (yaneurabeya) <yaneurabeya at gmail.com> wrote:
>> 
>> Hi,
>> 	I’ve been noticing some really weird behavior with terminal input after updating my kernel/userland — in particular, if I do `arc diff —create` (which opens vi/vim), and try to do edits/use ^c, it will terminate the running process for `arc diff —create`. Similarly, I was seeing really weird input via vim (when doing `svn ci`) where if I had one of the editing modes on, like insert, it would delete several lines at once; I worked around this by using ^c to terminate insert mode, but that’s a really bad hack. It worked ok with r316745, got worse in r317727, and doesn’t seem to be any better in r318250.
> 
> I forgot to mention: I’m using SSH to access my machine.

My gut feeling is the sc(4) commits might have tickled or introduced some bugs. I’ll try reverting the following commits over the next couple days to see whether or not my experience improves: r316827 r316830 r316865 r316878 r316974 r316977 r317190 r317198 r317199 r317245 r317256 r317264.
Thanks,
-Ngie
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