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From: Gregory Heytings <gregory@heytings.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Dario Gjorgjevski <dario.gjorgjevski@gmail.com>,
	45474@debbugs.gnu.org, Juri Linkov <juri@linkov.net>
Subject: bug#45474: Icomplete exhibiting in recursive minibuffer when it shouldn’t
Date: Fri, 23 Apr 2021 18:13:21 +0000	[thread overview]
Message-ID: <f2b9666c4af154b8671e@heytings.org> (raw)
In-Reply-To: <jwvh7jx6jfn.fsf-monnier+emacs@gnu.org>


>> Well, the fact that there were a few other pieces of code which do that 
>> was (at least as I understood it) part of the initial problem.  And the 
>> purpose of the discussion (at least as I understood it) was to solve 
>> the current problem without breaking these few other pieces of code.
>
> Indeed, and I think my patch should by and large leave them unaffected 
> (it neither magically fixes them nor breaks them).
>

Indeed, but... it doesn't help/incite them to move forward in the "right" 
direction, to finally have what has been on wishlist for quite a long 
time: to have buffer-local minibuffer-completion-* elements...

>> I admit that you lost me here.  What are these [SOMETHINGn]'s, and why 
>> are they happening?
>
> Because inevitably code can run in there, e.g. because the debugger gets 
> triggered in there or because the caller of `read-from-minibuffer` was 
> not careful to place the let-bindings of `minibuffer-completion-*` as 
> close as possible to `read-from-minibuffer`.
>

I see.  But when the let-bindings are in a macro the caller doesn't have 
to care with them, and they are indeed happening as close as possible to 
internal-read-from-minibuffer.  Unless they deliberately use 
internal-read-from-minibuffer and do some weird things, of course.

>
> [ Side note: you can't define `read-from-minibuffer` as a macro because 
> it is not compatible with the byte-code generated from code which called 
> `read-from-minibuffer` as a function.  So your patch would need to be 
> adjusted to keep `read-from-minibuffer` as a function. That opens up yet 
> more opportuninities for those [SOMETHINGn], such as advice placed on 
> `read-from-minibuffer`, ...  ]
>

I didn't know that ELC files had to be backward-compatible between major 
releases.  That being said, my preference would be to have the whole 
dancing happening at the C level (inside read_from_minibuffer and/or 
read_minibuf), which would solve that problem/these problems.

>>> You share the main downside of my proposal: `minibuffer-local-*` are 
>>> now only non-nil buffer-locally in the minibuffers.
>>>
>>> I mean it's good because it's what we want in the long term, but it's 
>>> bad because it's not backward compatible and there's probably some 
>>> code out there which will need to be adjusted to work with this.
>>
>> I have to admit again that you lost me here.
>
> No wonder: I wrote `minibuffer-local-*` when I meant 
> `minibuffer-completion-*`. Sorry 'bout that.
>

No worries ;-)  Now I see what you mean, and I do not see where you see a 
potential problem there: whether the minibuffer-completion-* elements 
become buffer-local depends on the minibuffer-local-completion variable. 
When it is nil (the default), they do not become buffer-local, and the 
behavior of read-from-minibuffer is the same as earlier.  This gives 
external package plenty of time to adapt their code to the future 
minibuffer-local-completion = t situation.





  reply	other threads:[~2021-04-23 18:13 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-27 17:44 bug#45474: Icomplete exhibiting in recursive minibuffer when it shouldn’t Dario Gjorgjevski
2021-04-15 17:40 ` Gregory Heytings
2021-04-15 21:11   ` Juri Linkov
2021-04-15 22:34     ` Gregory Heytings
2021-04-16  0:03       ` Gregory Heytings
2021-04-16 16:34         ` Juri Linkov
2021-04-16 16:55           ` Gregory Heytings
2021-04-17 20:49             ` Juri Linkov
2021-04-17 21:35               ` Gregory Heytings
2021-04-17 21:58                 ` Stefan Monnier
2021-04-17 22:16                   ` Gregory Heytings
2021-04-18 14:44                     ` Stefan Monnier
2021-04-18 22:23                       ` Gregory Heytings
2021-04-19  1:26                         ` Stefan Monnier
2021-04-19 12:14                           ` Gregory Heytings
2021-04-19 15:57                             ` Stefan Monnier
2021-04-19 20:20                               ` Gregory Heytings
2021-04-17 23:21                   ` bug#45474: [External] : " Drew Adams
2021-04-18  3:59                     ` Stefan Monnier
2021-04-18  4:04                       ` Drew Adams
2021-04-18  5:08                         ` Stefan Monnier
2021-04-18 15:42                           ` Drew Adams
2021-04-18 18:35                             ` Stefan Monnier
2021-04-18 20:11                               ` Drew Adams
2021-04-18 20:53                                 ` Stefan Monnier
2021-04-18 23:46                                   ` Drew Adams
2021-04-22 15:03                                     ` Stefan Monnier
2021-04-19 18:16                   ` Juri Linkov
2021-04-19 21:42                     ` Stefan Monnier
2021-04-20 19:00                       ` Gregory Heytings
2021-04-22 13:56                         ` Stefan Monnier
2021-04-22 14:08                           ` Gregory Heytings
2021-04-20 19:01                       ` Juri Linkov
2021-04-22 13:54                         ` Stefan Monnier
2021-04-22 14:13                           ` Stefan Monnier
2021-04-22 14:18                             ` Gregory Heytings
2021-04-22 15:18                               ` Gregory Heytings
2021-04-22 18:36                                 ` Stefan Monnier
2021-04-22 19:04                                   ` Gregory Heytings
2021-04-22 19:59                                     ` Gregory Heytings
2021-04-22 20:57                                       ` Gregory Heytings
2021-04-22 23:24                                     ` Stefan Monnier
2021-04-23  6:06                                       ` Eli Zaretskii
2021-04-23 13:12                                         ` Stefan Monnier
2021-04-23 13:19                                           ` Eli Zaretskii
2021-04-23 15:18                                             ` Stefan Monnier
2021-04-23 17:37                                               ` Eli Zaretskii
2021-04-23  6:59                                       ` Gregory Heytings
2021-04-23 13:21                                         ` Stefan Monnier
2021-04-23 13:45                                           ` Gregory Heytings
2021-04-23 15:35                                             ` Stefan Monnier
2021-04-23 15:58                                               ` Gregory Heytings
2021-04-23 16:36                                                 ` Juri Linkov
2021-04-23 16:55                                                 ` Stefan Monnier
2021-04-23 18:13                                                   ` Gregory Heytings [this message]
2021-04-23 20:24                                                     ` Stefan Monnier
2021-04-23 21:36                                                       ` Gregory Heytings
2021-04-23 21:54                                                         ` Stefan Monnier
2021-04-24  8:44                                                           ` Gregory Heytings
2021-05-01 19:34                                                             ` Stefan Monnier
2021-05-03  8:40                                                               ` Gregory Heytings
2022-06-07 12:04                                                                 ` Lars Ingebrigtsen
2021-04-22 21:57                             ` Juri Linkov
2021-04-23 15:53                               ` Stefan Monnier

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