GNU bug report logs - #51362
python font-lock-mode in emacs 28 seems broken

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From: Kévin Le Gouguec <kevin.legouguec <at> gmail.com>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: Jeff Spencer <jeffspencerd <at> gmail.com>, 51362 <at> debbugs.gnu.org, Dario Gjorgjevski <dario.gjorgjevski <at> gmail.com>
Subject: bug#51362: python font-lock-mode in emacs 28 seems broken
Date: Sun, 31 Oct 2021 10:34:30 +0100

[Message part 1 (text/plain, inline)]

Stefan Kangas <stefan <at> marxist.se> writes:

> Do you have an example file or snippet where font-lock fails?

I've tried to come up with a minimal reproducer; see attached file, and
screenshots.  In Emacs 28, the second assignment is not fontified until
the user starts editing the buffer.

I glanced at python.el's font-lock rules and tried to revert recent
changes, but tripped over conflicts.  I'm speculatively CC'ing Dario, in
case the issue looks obvious to him?

[repro.py (text/x-python, inline)]

a = foo(x='a')
b = a.bar()

[Screenshot_20211031_103332.png (image/png, attachment)]

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