bug#23117: 25.0.92; Having pcomplete-ignore-case different from completion-ignore-case can lead to an error

[Lars Ingebrigtsen]

Dmitry Gutov <dgutov@yandex.ru> writes:

> 1. (setq pcomplete-ignore-case t)
> 2. Keep completion-ignore-case at its default nil value.
> 3. M-x shell
> 3. Type 'cd /Usr/', press C-M-i.
> 4. See the below error.
>
> Should the former variable just be made into an alias for the latter one?
>
> Debugger entered--Lisp error: (error "Internal error: usr/games/ doesn’t 
> match \\`Usr\\(.*?\\)/")

This is still the case in Emacs 28, so the question remains, I guess --
should one of them be made into an alias for the other, and in that
case, which one should be the alias?

Stefan M added to the CCs.

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