Does anybody know how to debug a live Emacs process?

[Live System User]

Hi,

I have a live Emacs process that is stuck in a state which only
displays:

         Invalid argument #<terminal 2> in ‘get-device-terminal’

in the echo area, including when trying to execute M-x.

I was hoping to solicit assistance to help obtain information to
help Emacs and opened Bug#23378 on Monday.

If nothing can be done with gaining debug information with this
process, I guess I will just have to kill the process externally.

I am running GNU Emacs 25.0.92.1 on Gnu/Linux

Thanks.