Dmitry Gutov <dgutov@yandex.ru> writes:

> On 13.12.2020 15:12, Lars Ingebrigtsen wrote:
>> So...  this is apparently a feature?  Hitting `C-f' disables ido and
>> calls the fallback command, which is `write-region' in this case.
>                                         ^ write-file, right?

Yup.

> Okay, but why does the fallback command end up trying to overwrite the
> original file, even though, in your scenario, input ends with /vc/?

In essence, it's doing this (if we say we've navigated to "/tmp/" before
`C-f'):

(let ((default-directory "/tmp/"))
  (call-interactively 'write-file))

This gives you a prompt of

Write file: /tmp/

If you then hit RET, then: