GNU bug report logs - #42088
[feature/native-comp] Lockup on opening TypeScript files

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Package: emacs; Reported by: Sebastian Sturm <mail@HIDDEN>; Done: Andrea Corallo <andrea_corallo@HIDDEN>; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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Date: Tue, 30 Jun 2020 14:43:27 +0000 (UTC)
From: Andrea Corallo <andrea_corallo@HIDDEN>
To: Stefan Monnier <monnier@HIDDEN>
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Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
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Stefan wrote:

> [ Not sure what's the standard euphemism in use in France nowadays but
>=C2=A0=C2=A0 back when I lived nearby, "SDF" meant "sans domicile fixe" i.=
e. what we
>=C2=A0=C2=A0 here call "homeless" (and I've heard it referred to disturbin=
gly as
>=C2=A0=C2=A0 "rough sleepers").=C2=A0 ]

Well... must say this sounds surprisingly accurate! :/

Closing it :)

=C2=A0 Andrea
Notification sent to Sebastian Sturm <mail@HIDDEN>:
bug acknowledged by developer. Full text available.
Reply sent to Andrea Corallo <andrea_corallo@HIDDEN>:
You have taken responsibility. Full text available.

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From: Stefan Monnier <monnier@HIDDEN>
To: Andrea Corallo <andrea_corallo@HIDDEN>
Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
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>> The printer is normally able to preserve this info (printing #:<foo>
>> instead of <foo> for uninterned symbols and using #=3D and such the refer
>> to exactly that symbol) when printing code into the .elc file, so I'm
>> wondering why it gets lost when going through the native compiler.
> Yes that's the conclusion I came-up shortly after.=A0 Turned out that the
> native compiler was not configuring the printer to handle uninterned
> symbols, so the fix I pushed Sunday:
> 7f8512765a * Setup correctly the printer while dumping objs in native CU =
(bug#42088)

Great thanks!

> I corrected myself and discussed the fix in a mail sent into this thread
> but unfortunately this got lost.=A0 My sdf mail lost a number of mails in
> the last days both incoming and out-coming (possibly including one I sent
> you :).

[ Not sure what's the standard euphemism in use in France nowadays but
  back when I lived nearby, "SDF" meant "sans domicile fixe" i.e. what we
  here call "homeless" (and I've heard it referred to disturbingly as
  "rough sleepers").  ]


        Stefan
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#42088; Package emacs. Full text available.

Message received at 42088 <at> debbugs.gnu.org:


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Date: Tue, 30 Jun 2020 08:06:47 +0000 (UTC)
From: Andrea Corallo <andrea_corallo@HIDDEN>
To: Andrea Corallo <akrl@HIDDEN>, Stefan Monnier <monnier@HIDDEN>
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Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
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Stefan Monnier <monnier@HIDDEN> writes:

>> Okay after some digging I think I've an idea of what is going on:
>>
>> the code was hanging in `typescript--ensure-cache' in the loop
>>
>> (cl-loop while (re-search-forward typescript--quick-match-re-func nil t)=
...
>>
>> This because typescript--quick-match-re-func is not set correctly going
>> back and back this is because `typescript--available-frameworks' is set
>> to nil.
>
> Hmm... I'm afraid I can't follow this.=C2=A0 Could you provide some detai=
ls?

Sure,

this is how `typescript--available-frameworks' is computed in
typescript-mode.el.

=3D=3D=3D
(defconst typescript--available-frameworks
=C2=A0 (cl-loop with available-frameworks
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 for style in typescript--class-s=
tyles
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 for framework =3D (plist-get sty=
le :framework)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 unless (memq framework available=
-frameworks)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 collect framework into available=
-frameworks
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 finally return available-framewo=
rks)
=C2=A0 "List of available typescript frameworks symbols.")
=3D=3D=3D

The loop is expanded in:

=3D=3D=3D
(cl-block nil
=C2=A0=C2=A0=C2=A0 (let*
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ((available-frameworks nil)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (--cl-var-- typescript--cl=
ass-styles)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (style nil)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (framework nil)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (available-frameworks nil)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (--cl-var-- t))
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (while
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (consp --cl-var--)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (setq style
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 (car --cl-var--))
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (setq framework
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 (plist-get style :framework))
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (if
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (memq fr=
amework available-frameworks)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (progn)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (setq available-fram=
eworks
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 (nconc available-frameworks
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (list framework))=
))
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (setq --cl-var--
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 (cdr --cl-var--))
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (setq --cl-var-- nil))
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 available-frameworks))
=3D=3D=3D

If the two --cl-var-- are confused we never iterate and the block
evaluates to nil.=C2=A0 As a result `typescript--available-frameworks' was
(incorrectly) set to nil.

>> IIUC the reason for that is: cl-macs is expanding cl-loop using various
>> `--cl-var--', these looks the same but each of this is a separete
>> uninterned symbol.=C2=A0 The native compiler squash them all toghether h=
aving
>> to pass them through the reader and a simple testcase like this fails to
>> behave as expected.
>
> How/where exactly do they get squashed?
>
> The printer is normally able to preserve this info (printing #:<foo>
> instead of <foo> for uninterned symbols and using #=3D and such the refer
> to exactly that symbol) when printing code into the .elc file, so I'm
> wondering why it gets lost when going through the native compiler.

Yes that's the conclusion I came-up shortly after.=C2=A0 Turned out that th=
e
native compiler was not configuring the printer to handle uninterned
symbols, so the fix I pushed Sunday:

7f8512765a * Setup correctly the printer while dumping objs in native CU (b=
ug#42088)

I corrected myself and discussed the fix in a mail sent into this thread
but unfortunately this got lost.=C2=A0 My sdf mail lost a number of mails i=
n
the last days both incoming and out-coming (possibly including one I sent
you :).

This mail lossage has been extremely annoying sorry.

=C2=A0 Andrea
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#42088; Package emacs. Full text available.

Message received at 42088 <at> debbugs.gnu.org:


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From: Stefan Monnier <monnier@HIDDEN>
To: Andrea Corallo <akrl@HIDDEN>
Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
Message-ID: <jwvd05h2smt.fsf-monnier+emacs@HIDDEN>
References: <b581d5dc-d9a6-0669-8631-f3b7fa886b0f@HIDDEN>
 <xjfzh8oryjd.fsf@HIDDEN> <xjfk0zrsc6t.fsf@HIDDEN>
Date: Mon, 29 Jun 2020 22:33:02 -0400
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> Okay after some digging I think I've an idea of what is going on:
>
> the code was hanging in `typescript--ensure-cache' in the loop
>
> (cl-loop while (re-search-forward typescript--quick-match-re-func nil t)...
>
> This because typescript--quick-match-re-func is not set correctly going
> back and back this is because `typescript--available-frameworks' is set
> to nil.

Hmm... I'm afraid I can't follow this.  Could you provide some details?

> IIUC the reason for that is: cl-macs is expanding cl-loop using various
> `--cl-var--', these looks the same but each of this is a separete
> uninterned symbol.  The native compiler squash them all toghether having
> to pass them through the reader and a simple testcase like this fails to
> behave as expected.

How/where exactly do they get squashed?

The printer is normally able to preserve this info (printing #:<foo>
instead of <foo> for uninterned symbols and using #= and such the refer
to exactly that symbol) when printing code into the .elc file, so I'm
wondering why it gets lost when going through the native compiler.


        Stefan
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#42088; Package emacs. Full text available.

Message received at 42088 <at> debbugs.gnu.org:


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Subject: [feature/native-comp] Lockup on opening TypeScript files
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Hi Andrea,

thanks for your swift fix and for explaining the underlying issue! I can 
confirm that I'm now no longer seeing the typescript-mode bug. I do see 
the --cl-rest-- issue instead, but apparently you already fixed that as 
well so I guess rebuilding Emacs will take care of that.
thanks again for gccemacs,
Sebastian
Information forwarded to bug-gnu-emacs@HIDDEN:
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From: Andrea Corallo <akrl@HIDDEN>
To: Sebastian Sturm <mail@HIDDEN>
Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
References: <b581d5dc-d9a6-0669-8631-f3b7fa886b0f@HIDDEN>
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Apparently some mail got lost.

Anyway should be fixed by 7f8512765a, please give it a try.

Thanks!

  Andrea

-- 
akrl@HIDDEN
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bug#42088; Package emacs. Full text available.

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To: Sebastian Sturm <mail@HIDDEN>
Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
References: <b581d5dc-d9a6-0669-8631-f3b7fa886b0f@HIDDEN>
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 Content preview: Okay after some digging I think I've an idea of what is going
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Okay after some digging I think I've an idea of what is going on:

the code was hanging in `typescript--ensure-cache' in the loop

(cl-loop while (re-search-forward typescript--quick-match-re-func nil t)...

This because typescript--quick-match-re-func is not set correctly going
back and back this is because `typescript--available-frameworks' is set
to nil.

IIUC the reason for that is: cl-macs is expanding cl-loop using various
`--cl-var--', these looks the same but each of this is a separete
uninterned symbol.  The native compiler squash them all toghether having
to pass them through the reader and a simple testcase like this fails to
behave as expected.

===
(require 'cl-lib)

(defun foo ()
  (cl-loop for xxx in '(a b)
           for yyy = xxx
           do (print xxx)))
===

This fails only compiling for dynamic scope because in lexical all
--cl-vars-- are absorbed as slots in the execution stack.

I suspect the solution is to have some renaming performed by the native
compiler not to confuse them.

  Andrea

--
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Information forwarded to bug-gnu-emacs@HIDDEN:
bug#42088; Package emacs. Full text available.

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To: Sebastian Sturm <mail@HIDDEN>
Subject: Re: bug#42088: [feature/native-comp] Lockup on opening TypeScript
 files
References: <b581d5dc-d9a6-0669-8631-f3b7fa886b0f@HIDDEN>
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Sebastian Sturm <mail@HIDDEN> writes:

> Apologies in advance for this being a very vague bug report, but I
> don't know how to properly debug this kind of issue (pointers
> appreciated!)

Hi Sebastian,

no worries, at this stage we have finished the trivial bugs :)

I think the questions are two:

- Is Emacs just looping forever in
  F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_10 or is does
  something more complex?

- Where is F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_10
  defined?  Being lambdas regular objects is can come from any
  complilaiton unit.

I believe the easiest to answere is to compile using `comp-debug' 1 and
then while is hanging just trap with the gdb and see what is going on.

I managed to reproduce the issue, tomorrow I'll be curious to have a
look.

Thanks!

  Andrea

-- 
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Information forwarded to bug-gnu-emacs@HIDDEN:
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Subject: [feature/native-comp] Lockup on opening TypeScript files
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Apologies in advance for this being a very vague bug report, but I don't 
know how to properly debug this kind of issue (pointers appreciated!)

I find that, using the latest version of gccemacs (commit 
#801e19d0ba8e048...) and typescript.el (commit #0fc729787007b5111f...) 
Emacs will lock up with 100% cpu usage whenever a TypeScript file is 
opened. Interrupting Emacs using SIGUSR2 produces the following backtrace:

Debugger entered--entering a function:
* #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_10>()
   typescript--ensure-cache(515)
   typescript--class-decl-matcher(515)
   font-lock-fontify-keywords-region(1 515 nil)
   font-lock-default-fontify-region(1 501 nil)
   font-lock-fontify-region(1 501)
   #f(compiled-function (fun) #<bytecode 
0x58bf2cebcbf23b5>)(font-lock-fontify-region)
   jit-lock--run-functions(1 501)
   jit-lock-fontify-now(1 501)
   jit-lock-function(1)
   redisplay_internal\ \(C\ function\)()

I didn't spot any literal lambda within typescript--ensure-cache so I 
assume it's being generated by some macro? Adding the melpa package 
repository to the gccemacs docker image, installing typescript-mode and 
opening a .ts file also causes the Docker version to lock up with 100% 
CPU usage so I assume this is not caused by my config (trying to send 
SIGUSR2 to emacs terminated the entire container).
If there's anything I can try out to debug this issue, I'll gladly do so.

Thanks for your amazing work on gccemacs!
Sebastian

The following is extracted from the template produced by 
report-emacs-bug, though given that the Docker image locks up too, I 
guess most of it isn't of interest anyway:

In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 
3.22.30, cairo version 1.15.10)
  of 2020-06-27 built on cartman
Repository revision: 801e19d0ba8e048a9faa5d5169ec4183e41b0148
Repository branch: feature/native-comp
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Linux Mint 19.1

Recent messages:
Doom loaded 235 packages across 53 modules in 0.672s
Waiting for git... [2 times]
Loading /home/sebastian/.emacs.d/.local/cache/recentf...done
+Word-Wrap mode enabled in current buffer
current-kill: Kill ring is empty
Mark set [9 times]

Configured using:
  'configure --prefix=/usr/local/stow/gccemacs CC=gcc-10 'CFLAGS=-O3
  -mtune=native -march=native -DNDEBUG' --with-nativecomp'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS JSON PDUMPER
LCMS2 GMP

Important settings:
   value of $LC_MONETARY: en_US.UTF-8
   value of $LC_NUMERIC: en_US.UTF-8
   value of $LC_TIME: en_US.UTF-8
   value of $LANG: en_US.UTF-8
   locale-coding-system: utf-8
Acknowledgement sent to Sebastian Sturm <mail@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#42088; Package emacs. Full text available.
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