bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Tassilo Horn]

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The GNU ELPA package vertico shows possible completion candidates in an
overlay during minibuffer completion.  I've just noticed that this
doesn't work properly when the generated eln file is loaded rather than
the el or elc file.

By "not working properly" I mean that frequently either the minibuffer
prompt is displayed or the overlay showing the candidates but not both.
Sometimes also both, but then the cursor is blinking at the end of the
candidates overlay rather than immediately behind the input.  Also the
candidate count overlay seems to be only shown if the prompt is also
there but not the canditates overlay.  Here's a screenshot:

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[-- Type: image/png, Size: 7666 bytes --]

[-- Attachment #3: Type: text/plain, Size: 9183 bytes --]


Here's a reproduction recipe:

  0. Build the current native-comp branch, HEAD is
     af0af63742fd2383dae5627d0ce8167517fd4700 right now.
     Install the vertico GNU ELPA package and wait for its async
     native compilation to be finished.
  1. emacs -Q
  2. Load the ELN file (which is the only one I have, so I'm sure it's
     the right one for my current emacs):
     M-x load-file RET
     ~/.emacs.d/eln-cache/28.0.50-bc702aed/vertico-6eb6690f-90eaf131.eln
     RET
  3. M-x vertico-mode RET
  4. Try C-x C-b or C-x C-f to see the problem.


In GNU Emacs 28.0.50 (build 47, x86_64-pc-linux-gnu, GTK+ Version 3.24.28, cairo version 1.17.4)
 of 2021-04-18 built on thinkpad-t440p
Repository revision: 5819f4fb0a9337fab4c32dac557a02ec6497bce5
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101001
System Description: Arch Linux

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bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Daniel Mendler]

This issue has been reported before on github:

https://github.com/minad/vertico/issues/13
https://github.com/minad/vertico/issues/15 (duplicate)

As Tassilo observed, the bug seems to occur only on native, but I have 
not investigated this myself yet.

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Eli Zaretskii]

> From: Tassilo Horn <tsdh@gnu.org>
> Date: Sun, 18 Apr 2021 13:16:29 +0200
> 
>      M-x load-file RET
>      ~/.emacs.d/eln-cache/28.0.50-bc702aed/vertico-6eb6690f-90eaf131.eln

Btw, the hashes in this file name are entirely system-dependent, so
people should not try looking for a file under that specific name,
just the newest file that matches vertico-*.eln in some subdirectory
of eln-cache.

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Tassilo Horn <tsdh@gnu.org> writes:

> The GNU ELPA package vertico shows possible completion candidates in an
> overlay during minibuffer completion.  I've just noticed that this
> doesn't work properly when the generated eln file is loaded rather than
> the el or elc file.
>
> By "not working properly" I mean that frequently either the minibuffer
> prompt is displayed or the overlay showing the candidates but not both.
> Sometimes also both, but then the cursor is blinking at the end of the
> candidates overlay rather than immediately behind the input.  Also the
> candidate count overlay seems to be only shown if the prompt is also
> there but not the canditates overlay.  Here's a screenshot:
>
>
>
> Here's a reproduction recipe:
>
>   0. Build the current native-comp branch, HEAD is
>      af0af63742fd2383dae5627d0ce8167517fd4700 right now.
>      Install the vertico GNU ELPA package and wait for its async
>      native compilation to be finished.
>   1. emacs -Q
>   2. Load the ELN file (which is the only one I have, so I'm sure it's
>      the right one for my current emacs):
>      M-x load-file RET
>      ~/.emacs.d/eln-cache/28.0.50-bc702aed/vertico-6eb6690f-90eaf131.eln
>      RET
>   3. M-x vertico-mode RET
>   4. Try C-x C-b or C-x C-f to see the problem.

Hi Tassilo,

thanks for reporting this.

I think it would be very helpful to know which one is the Emacs function
that once gets called misbehaves.

Thanks

  Andrea

PS one should just load the .elc file to obtain the corresponding .eln
loaded.

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Tassilo Horn]

Andrea Corallo <akrl@sdf.org> writes:

Hi Andrea,

> I think it would be very helpful to know which one is the Emacs
> function that once gets called misbehaves.

That's a bit hard to pinpoint.  It happens during `completing-read'
where the two vertico functions below are called from a
`post-command-hook' in order to display vertico's two overlays, the
"count overlay" before the minibuffer prompt, and the "candidates
overlay" starting after the input string.  Here's a "screenshot" of how
it is supposed to look like, | representing the usual position of point.

[1/3]   Find file: input|
input-candidate1
input-candidate2
input-candidate3

And here are the functions:

--8<---------------cut here---------------start------------->8---
(defun vertico--display-candidates (lines)
  "Update candidates overlay `vertico--candidates-ov' with LINES."
  (move-overlay vertico--candidates-ov (point-max) (point-max))
  (overlay-put vertico--candidates-ov 'after-string
               (apply #'concat #(" " 0 1 (cursor t)) (and lines "\n") lines))
  (let* ((lh (default-line-height))
         (resize (default-value 'resize-mini-windows))
         (dp (- (max (cdr (window-text-pixel-size))
                     (* lh (1+ (if resize (length lines) vertico-count))))
                (window-pixel-height)))
         (dl (ceiling dp lh)))
    (when (or (> dl 0) (eq resize t)) (window-resize nil dl))))

(defun vertico--display-count ()
  "Update count overlay `vertico--count-ov'."
  (when vertico-count-format
    (move-overlay vertico--count-ov (point-min) (point-min))
    (overlay-put vertico--count-ov 'before-string
                 (format (car vertico-count-format)
                         (format (cdr vertico-count-format)
                                 (cond ((>= vertico--index 0) (1+ vertico--index))
                                       ((vertico--allow-prompt-selection-p) "*")
                                       (t "!"))
                                 vertico--total)))))
--8<---------------cut here---------------end--------------->8---

> PS one should just load the .elc file to obtain the corresponding .eln
> loaded.

Ah, ok.

Bye,
Tassilo

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Tassilo Horn <tsdh@gnu.org> writes:

>> PS one should just load the .elc file to obtain the corresponding .eln
>> loaded.
>
> Ah, ok.
>
> Bye,
> Tassilo

Sorry I was imprecise on this, if one explicitly request the .elc via
`load' this will be loaded, if `load' can chose the extension the .eln
will be preferred.

  Andrea

PS I'm starting to look into this issue.

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs@gnu.org> writes:

[...]

> PS I'm starting to look into this issue.

Just a small update, yesterday I had a look and I think I've a grasp of
what's going on but today I had no time to progress on this.  I think
I'll come-up with a patch this week.

Thanks!

  Andrea

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[jakanakaevangeli]

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=47922
is very likely related.

Best.

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

jakanakaevangeli@chiru.no writes:

> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=47922
> is very likely related.
>

Yes, the reason is that we hash cons all immediates using equal has test
function, but this does not distinguish string with different
properties.  I'm working on the best fix here.

I'll merge 47922 with this bug.

Thanks

  Andrea

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Daniel Mendler]

On 4/21/21 9:58 AM, Andrea Corallo wrote:
> Yes, the reason is that we hash cons all immediates using equal has test
> function, but this does not distinguish string with different
> properties.  I'm working on the best fix here.
> 
> I'll merge 47922 with this bug.

Is it uncommon to use propertized string literals, since these were the 
ones which introduced the issue here? (No coincidence that two packages 
of mine were affected by this)

Daniel

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Daniel Mendler <mail@daniel-mendler.de> writes:

> On 4/21/21 9:58 AM, Andrea Corallo wrote:
>> Yes, the reason is that we hash cons all immediates using equal has test
>> function, but this does not distinguish string with different
>> properties.  I'm working on the best fix here.
>> I'll merge 47922 with this bug.
>
> Is it uncommon to use propertized string literals, since these were
> the ones which introduced the issue here? (No coincidence that two
> packages of mine were affected by this)

Yes it is uncommon but still this is a native compiler bug as the byte
compiler hash cons string correctly.

  Andrea

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Eli Zaretskii]

> From: Daniel Mendler <mail@daniel-mendler.de>
> Date: Wed, 21 Apr 2021 10:05:21 +0200
> Cc: 47868@debbugs.gnu.org, tsdh@gnu.org
> 
> Is it uncommon to use propertized string literals

Not sure if it's common, but IMNSHO it's somewhat ugly and hard to
read (and easy to make mistakes).  So my recommendation is not to use
that; use propertize instead.

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Tassilo Horn]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Daniel Mendler <mail@daniel-mendler.de>
>> Date: Wed, 21 Apr 2021 10:05:21 +0200
>> Cc: 47868@debbugs.gnu.org, tsdh@gnu.org
>> 
>> Is it uncommon to use propertized string literals
>
> Not sure if it's common, but IMNSHO it's somewhat ugly and hard to
> read (and easy to make mistakes).  So my recommendation is not to use
> that; use propertize instead.

In the concrete example at hand, which is "add properties to a specific
substring of the string", I think it is not more ugly and hard to read
than having to split the string and propertize the individual parts and
then concatenate it back again.

Well, maybe it's on par here but I cannot even imagine how to use
`propertize' to create a string where properties overlap without jumping
through hoops.

Hm, when I do

  #("foo" 0 3 (bar t) 1 2 (foo 1))

I get

  #("foo" 0 1 (bar t) 1 2 (foo 1) 2 3 (bar t))

which I did not expect.  I'd rather expect

  #("foo" 0 1 (bar t) 1 2 (foo 1 bar t) 2 3 (bar t))

so it seems like the propertized string literals also have some
gotchas...

Bye,
Tassilo

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Daniel Mendler]

On 4/21/21 10:31 AM, Andrea Corallo wrote:
> Daniel Mendler <mail@daniel-mendler.de> writes:
>> Is it uncommon to use propertized string literals, since these were
>> the ones which introduced the issue here? (No coincidence that two
>> packages of mine were affected by this)
> 
> Yes it is uncommon but still this is a native compiler bug as the byte
> compiler hash cons string correctly.

No doubt it is is a bug. I was just wondering that two of my recent 
packages triggered a bug given that many people already happily use 
native. Thank you for fixing this and for all the efforts with native 
compilation. I am looking very much forward to using it.

Daniel

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Daniel Mendler <mail@daniel-mendler.de> writes:

> On 4/21/21 10:31 AM, Andrea Corallo wrote:
>> Daniel Mendler <mail@daniel-mendler.de> writes:
>>> Is it uncommon to use propertized string literals, since these were
>>> the ones which introduced the issue here? (No coincidence that two
>>> packages of mine were affected by this)
>> Yes it is uncommon but still this is a native compiler bug as the
>> byte
>> compiler hash cons string correctly.
>
> No doubt it is is a bug. I was just wondering that two of my recent
> packages triggered a bug given that many people already happily use
> native. Thank you for fixing this and for all the efforts with native
> compilation. I am looking very much forward to using it.
>
> Daniel

Yes, indeed your packages did a very good work at unveiling this bug :)

As of f842816125 it should work (haven't tried again with vertigo tho),
some testing appreciated as usual.

Thanks!

  Andrea

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Doug Davis]

Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs@gnu.org> writes:

> Daniel Mendler <mail@daniel-mendler.de> writes:
>
>> On 4/21/21 10:31 AM, Andrea Corallo wrote:
>>> Daniel Mendler <mail@daniel-mendler.de> writes:
>>>> Is it uncommon to use propertized string literals, since these were
>>>> the ones which introduced the issue here? (No coincidence that two
>>>> packages of mine were affected by this)
>>> Yes it is uncommon but still this is a native compiler bug as the
>>> byte
>>> compiler hash cons string correctly.
>>
>> No doubt it is is a bug. I was just wondering that two of my recent
>> packages triggered a bug given that many people already happily use
>> native. Thank you for fixing this and for all the efforts with native
>> compilation. I am looking very much forward to using it.
>>
>> Daniel
>
> Yes, indeed your packages did a very good work at unveiling this bug :)
>
> As of f842816125 it should work (haven't tried again with vertigo tho),
> some testing appreciated as usual.

I just recompiled my local native-comp branch and vertico is behaving as
it does with my package-manager-provided Emacs 27.2 installation. thanks
Daniel and Andrea :)

bug#47868: 28.0.50; [native-comp] vertico package doesn't work when loading the corresponding eln file

[Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Doug Davis <ddavis@ddavis.io> writes:

> Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of
> text editors" <bug-gnu-emacs@gnu.org> writes:
>
>> Daniel Mendler <mail@daniel-mendler.de> writes:
>>
>>> On 4/21/21 10:31 AM, Andrea Corallo wrote:
>>>> Daniel Mendler <mail@daniel-mendler.de> writes:
>>>>> Is it uncommon to use propertized string literals, since these were
>>>>> the ones which introduced the issue here? (No coincidence that two
>>>>> packages of mine were affected by this)
>>>> Yes it is uncommon but still this is a native compiler bug as the
>>>> byte
>>>> compiler hash cons string correctly.
>>>
>>> No doubt it is is a bug. I was just wondering that two of my recent
>>> packages triggered a bug given that many people already happily use
>>> native. Thank you for fixing this and for all the efforts with native
>>> compilation. I am looking very much forward to using it.
>>>
>>> Daniel
>>
>> Yes, indeed your packages did a very good work at unveiling this bug :)
>>
>> As of f842816125 it should work (haven't tried again with vertigo tho),
>> some testing appreciated as usual.
>
> I just recompiled my local native-comp branch and vertico is behaving as
> it does with my package-manager-provided Emacs 27.2 installation. thanks
> Daniel and Andrea :)

Very nice thanks you for testing :)

Closing this then, happy to reopen if necessary.

Thanks

  Andrea