[Twisted-Python] KeyError in SSHConnection.ssh_CHANNEL_OPEN_CONFIRMATION

[Glyph]

> On Jul 7, 2017, at 9:55 AM, Stephen McRoberts <steveo at mcroberts.org> wrote:
> 
>  I made a minimal single-file.py app to perform test runs and never had the issue. Observer altered reality?
> 
> Then I realized there are a couple of threads in the application which were there before moving to twisted a long time ago. They never manifested themselves in any other way.
> 
> I removed the python threads and now it's running without the channel problem. (As a side note, I had overcome the channel problem by sending deferreds to a point where I could re-start the channel open and it would work but I'm glad to have that work-around out of the code.)
> 
Hooray, glad you managed to track it down (sort of)!  Unfortunately it's quite difficult for us to automatically reject usage of Twisted APIs from threads without catastrophically terrible performance :-\.  But this is the cause of a lot of "how could this possibly happen" reports from users.

-glyph

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