Bind non-essential to prevent tramp error

[juergenhoetzel]

I use company-capf in eshell. An error is raised when completing Tramp filenames like
cd /scp:
`
->

Debugger entered--Lisp error: (error "Company: backend company-capf error \"Host name must not match method \"scp\"\" with args (candidates /scp:)")

See discussion here:

http://lists.gnu.org/archive/html/tramp-devel/2016-03/msg00005.html

[dgutov]

Hi!

This seems to be a bug in Emacs: you can type M-x pcomplete, and get the same error.

You'll even get this error if the input is just cd /.

[juergenhoetzel]

@albinus: Any options about fixing this in pcomplete/eshell ?

[albinus]

Jürgen Hötzel notifications@github.com writes:

@albinus: Any options about fixing this in pcomplete?

I've tried to reproduce the bug in pcomplete, but it doesn't work for
me:

~/src/emacs-25/src/emacs -Q /

M-x load-library RET pcomplete
M-x pcomplete RET
=> Invalid function: pcomplete-here

Best regards, Michael.

[juergenhoetzel]

Jürgen Hötzel notifications@github.com writes:
@albinus: Any options about fixing this in pcomplete?
I've tried to reproduce the bug in pcomplete, but it doesn't work for
me:

emacs -Q /

M-x load-library RET pcomplete
M-x pcomplete RET
=> Invalid function: pcomplete-here

Best regards, Michael.

@albinus Hi Michael,

i can reproduce this on emacs master branch, not in the dired pcomplete setup, but eshell:

emacs -Q /

M-x eshell RET

Welcome to the Emacs shell

Enter a tramp-filename prefix:

/ $ /scp:

then

M-x pcomplete RET

results in this error:

tramp-file-name-handler: Host name must not match method "scp"

[albinus]

Jürgen Hötzel notifications@github.com writes:

@albinus Hi Michael,

Hi Juergen,

i can reproduce this on emacs master branch, not in the dired
pcomplete setup, but eshell:

emacs -Q /

M-x eshell RET
Welcome to the Emacs shell

Enter a tramp-filename prefix:

/ $ /scp:

then

M-x pcomplete RET

results in this error:

tramp-file-name-handler: Host name must not match method "scp"

Thanks for the recipe, I could reproduce it here as well. Will fix it in
pcomplete, either the emacs-25 branch (frozen already), or in master.

Best regards, Michael.