GNU logs - #32350, boring messages

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Subject: bug#32350: 26.1; Disabling flymake from file-local eval is buggy
Resent-From: Carlos Pita <carlosjosepita@HIDDEN>
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From: Carlos Pita <carlosjosepita@HIDDEN>
Date: Thu, 02 Aug 2018 18:02:10 -0300
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Just try putting this in test.el and reopening it:

    ;; -*- eval: (flymake-mode -1) -*-

    (1 1)

Flymake will be off, it won't write anything to the modeline but the
fringe and in-buffer underline indicators will still be there.

If you eval the same expression using M-: after the buffer is loaded
flymake mode is fully turned off as expected.

---


In GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2018-07-05 built on juergen
Windowing system distributor 'The X.Org Foundation', version 11.0.12000000
Recent messages:
Ignoring unknown mode =E2=80=98(flymake-mode -1)-mode=E2=80=99
Malformed mode-line: "(flymake-mode -1)" [2 times]
next-line: End of buffer
Saving file /tmp/test.el...
Wrote /tmp/test.el
next-line: End of buffer
Mark set
Mark activated
previous-line: Beginning of buffer
next-line: End of buffer
Quit
Configured using:
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ong
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Major mode: Emacs-Lisp

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Memory information:
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 (string-bytes 1 3796567)
 (vectors 16 68717)
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 (intervals 56 1048 157)
 (buffers 992 30))

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Carlos Pita <carlosjosepita@HIDDEN>
Subject: bug#32350: Acknowledgement (26.1; Disabling flymake from
 file-local eval is buggy)
Message-ID: <handler.32350.B.153324374926207.ack <at> debbugs.gnu.org>
References: <878t5oa3e5.fsf@HIDDEN>
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Date: Thu, 02 Aug 2018 21:03:01 +0000

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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#32350: 
References: <878t5oa3e5.fsf@HIDDEN>
In-Reply-To: <878t5oa3e5.fsf@HIDDEN>
Resent-From: Carlos Pita <carlosjosepita@HIDDEN>
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From: Carlos Pita <carlosjosepita@HIDDEN>
Date: Thu, 2 Aug 2018 18:15:31 -0300
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I think this could be due an async check being active at the time
flymake-delete-own-overlays is, too early, called. Indeed the overlays
appear perceptibly after the buffer was loaded.

It probably can happen when flymake is manually disabled but, I assume
due to timing issues, I'm unable to reproduce the same effect by hand.

I'm speculating here but I believe the routine that is writing the
overlays should first check that flymake is still enabled, since it
could have been disabled in the meantime.

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#32350: 26.1; Disabling flymake from file-local eval is buggy
Resent-From: =?UTF-8?Q?Jo=C3=A3o_?= =?UTF-8?Q?T=C3=A1vora?= <joaotavora@HIDDEN>
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To: Carlos Pita <carlosjosepita@HIDDEN>
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In-Reply-To: <878t5oa3e5.fsf@HIDDEN> (Carlos Pita's message of "Thu, 02 Aug
 2018 18:02:10 -0300")
References: <878t5oa3e5.fsf@HIDDEN>
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Date: Thu, 04 Oct 2018 16:04:16 +0100
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Carlos Pita <carlosjosepita@HIDDEN> writes:

> Just try putting this in test.el and reopening it:
>
>     ;; -*- eval: (flymake-mode -1) -*-
>
>     (1 1)
>
> Flymake will be off, it won't write anything to the modeline but the
> fringe and in-buffer underline indicators will still be there.
>
> If you eval the same expression using M-: after the buffer is loaded
> flymake mode is fully turned off as expected.

Hi Carlos,

Perhaps the best way to turn off flymake on a file-by-file basis is to
use the flymake-diagnostic-functions local variable instead, with the
added benefit that it won't be risky if you set it to a null value.

    flymake-diagnostic-functions is a variable defined in `flymake.el'.
    Its value is nil
=20=20=20=20=20
      This variable may be risky if used as a file-local variable.
      This variable is safe as a file local variable if its value
      satisfies the predicate `null'.

I don't know how hard it is to make mode-specific eval's work properly
from file-local-variables but I would suspect flymake-mode isn't the
only mode affected by this.

Jo=E3o

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