Bug 1950158

Summary:	Emacs freezes in Modula-2 mode
Product:	[Fedora] Fedora	Reporter:	Matthew Saltzman <mjs>
Component:	emacs	Assignee:	Daiki Ueno <dueno>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	33	CC:	dan.cermak, dueno, gordon.messmer, jkeating, jonathan.underwood, msekleta, phracek, robinlee.sysu, swt
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	emacs-27.2-3.fc35 emacs-27.2-3.eln110 emacs-27.2-2.fc33 emacs-27.2-2.fc34	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-04-26 14:36:55 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Matthew Saltzman 2021-04-15 22:24:02 UTC

Description of problem: Inputting a certain string in an empty file whose name ends in .mod freezes Emacs.


Version-Release number of selected component (if applicable): 
emacs-27.2-1.fc33.x86_64


How reproducible: Always


Steps to Reproduce:
1. emacs foo.mod
2. Input the line
set PROD :
3. 

Actual results:
As soon as you enter the :, Emacs freezes.

Expected results:
Should be able to continue editing.

Additional info:
I'm not actually programming in Modula-2, but the product I'm using typically names files with the .mod suffix. Switching to text mode works around the problem.

The file is autosaved as #foo.mod#. Recovering it also freezes Emacs as soon as you place your cursor following the :.

The identifier can be anything, not just PROD.

Comment 1 Matthew Saltzman 2021-04-18 23:24:01 UTC

Only happens when the offending line is entered on line 1.

Comment 2 Dan Čermák 2021-04-25 07:45:58 UTC

This appears to be a general Emacs issue, as I can reproduce that with the Emacs flatpak as well.

Comment 3 Dan Čermák 2021-04-25 20:54:47 UTC

Reported upstream: https://lists.gnu.org/archive/html/bug-gnu-emacs/2021-04/msg01449.html

Comment 4 Fedora Update System 2021-04-26 14:36:55 UTC

FEDORA-2021-81bffad259 has been pushed to the Fedora 35 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 5 Fedora Update System 2021-04-26 15:54:56 UTC

FEDORA-2021-80ba6477f3 has been pushed to the Fedora ELN stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2021-04-26 16:18:44 UTC

FEDORA-2021-ebd6e6afa2 has been submitted as an update to Fedora 34. https://bodhi.fedoraproject.org/updates/FEDORA-2021-ebd6e6afa2

Comment 7 Fedora Update System 2021-04-26 17:52:19 UTC

FEDORA-2021-c879f63d24 has been submitted as an update to Fedora 33. https://bodhi.fedoraproject.org/updates/FEDORA-2021-c879f63d24

Comment 8 Fedora Update System 2021-04-27 01:23:12 UTC

FEDORA-2021-ebd6e6afa2 has been pushed to the Fedora 34 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2021-ebd6e6afa2`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2021-ebd6e6afa2

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 9 Fedora Update System 2021-04-27 01:26:58 UTC

FEDORA-2021-c879f63d24 has been pushed to the Fedora 33 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2021-c879f63d24`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2021-c879f63d24

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 10 Fedora Update System 2021-05-05 00:53:36 UTC

FEDORA-2021-c879f63d24 has been pushed to the Fedora 33 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2021-05-06 01:00:31 UTC

FEDORA-2021-ebd6e6afa2 has been pushed to the Fedora 34 stable repository.
If problem still persists, please make note of it in this bug report.