Philipp Stephani <p.stephani2@gmail.com> schrieb am Fr., 3. März 2017 um
14:41 Uhr:

>
> emacs -Q
> C-x C-f /:/tmp/foobar.txt (it doesn't matter whether the file exists)
> M-: (process-file "true")
>
> will result in an error
>
> Debugger entered--Lisp error: (file-missing "Setting current directory"
> "No such file or directory" "/:/tmp/")
>   call-process("true" nil nil nil)
>   apply(call-process "true" nil nil nil nil)
>   process-file("true" nil nil nil)
>   apply(process-file ("true" nil nil nil))
>   file-name-non-special(process-file "true" nil nil nil)
>   apply(file-name-non-special process-file "true" nil nil nil nil)
>   process-file("true" nil nil nil)
>   apply(process-file ("true" nil nil nil))
>   tramp-run-real-handler(process-file ("true" nil nil nil))
>   tramp-file-name-handler(process-file "true" nil nil nil)
>   apply(tramp-file-name-handler process-file "true" nil nil nil nil)
>   process-file("true")
>   eval((process-file "true") nil)
>   eval-expression((process-file "true") nil)
>   funcall-interactively(eval-expression (process-file "true") nil)
>   call-interactively(eval-expression nil nil)
>   command-execute(eval-expression)
>

The same issue can be triggered simply with

(let ((default-directory "/:/")) (process-file "true"))