bug#33619: 26.1.90; Tramp "simplified" syntax completion problem

[Michael Albinus]

David Hull <david.hull@openx.com> writes:

Hi David,

Thanks for the report.

> Filename completion does not work with tramp's "simplified" syntax.
>
>   (load-library "tramp")
>   (tramp-change syntax 'simplified)
>
> Now if I run find-file and type "//cos6:src/ss" and then TAB I get the
> error:
>
>   completion--some: Wrong type argument: stringp, ""
>
> (My remote host is named "cos6" and it has a "src/ssrtb-server"
> directory.)
>
> If I set the the tramp-syntax back to 'default then completion works.
> Completion worked with the "simplified" syntax in emacs 26.1.

I've tried to reproduce it with the current emacs-26 branch on an Ubuntu
18.10 machine. You're on a macOS machine, but this shouldn't matter.

The problem doesn't happen to me.

Could you pls start "emacs -Q -l tramp", change the Tramp syntax, and
try to reproduce the problem? Does it still happen?

In case of yes, could you perform (setq debug-on-error t) prior the
test, and show the resulting backtrace?

Thanks, and best regards, Michael.