GNU bug report logs - #12615
24.2.50; Non-ignored case in insert-char

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Message #38 received at 12615 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 12615 <at> debbugs.gnu.org, Harald Hanche-Olsen <hanche <at> math.ntnu.no>
Subject: Re: bug#12615: 24.2.50; Non-ignored case in insert-char
Date: Fri, 04 Jan 2013 02:13:13 +0200

>>> Some observations: C-x 8 C-m is bound to insert-char, a C function.
>>> And insert-char calls read-char-by-name, which let-binds
>>> completion-ignore-case to t.  The clear intention is that unicode name
>>> searches should always be case insensitive, and this seems always to
>>> be the case if completion-ignore-case is not buffer local.
>>
>> Indeed, a buffer-local setting of completion-ignore-case can
>> bring surprises.  I think the patch below will fix this problem for this
>> particular case.
>
> I just stumbled upon the case where this fix causes the regression:
> typing `C-x 8 RET *acc TAB' results in "[No match]".
>
> I don't know why this case disobeys the let-binding of
> `completion-ignore-case' and whether a simpler fix is possible,
> but at least this patch fixes it for the emacs-24 branch:

Please ignore this patch.  Just search the source tree with
grep "completion-ignore-case t" and see the remaining 100 places
that have exactly the same problem.  Take for example the first grep
hit in bookmark.el.  Evaluate the following in the *scratch* buffer:
(make-local-variable 'completion-ignore-case)
Then type `C-x r b' (`bookmark-jump')
followed by a lower-case letter and TAB.
Completion is not case insensitive.

Maybe to fix all them at once, `read_minibuf' should make
a local variable `completion-ignore-case' in the minibuffer
and copy its value from the original buffer?

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