Add fix for rhbz#1950158: freeze in modula2 mode

emacs-modula2.patch

@@ -0,0 +1,30 @@
+From 462ca0654d2aa2a2b6506f2e9a1a9ceb8e683cad Mon Sep 17 00:00:00 2001
+From: Gregory Heytings <gregory@heytings.org>
+Date: Sun, 25 Apr 2021 10:33:48 +0000
+Subject: [PATCH] Fix infloop in Modula-2 mode
+
+* lisp/progmodes/modula2.el (m2-smie-refine-colon): Stop looping when
+point does not move with forward-sexp (Bug#48011)
+---
+ lisp/progmodes/modula2.el | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/lisp/progmodes/modula2.el b/lisp/progmodes/modula2.el
+index 2a0374aa81..5756d91831 100644
+--- a/lisp/progmodes/modula2.el
++++ b/lisp/progmodes/modula2.el
+@@ -201,7 +201,10 @@ m2-smie-refine-colon
+          ((zerop (length tok))
+           (let ((forward-sexp-function nil))
+             (condition-case nil
+-                (forward-sexp -1)
++                (let ((p (point)))
++                  (forward-sexp -1)
++                  (if (= p (point))
++                      (setq res ":")))
+               (scan-error (setq res ":")))))
+          ((member tok '("|" "OF" "..")) (setq res ":-case"))
+          ((member tok '(":" "END" ";" "BEGIN" "VAR" "RECORD" "PROCEDURE"))
+-- 
+2.30.2
+

emacs.spec

@@ -5,7 +5,7 @@ Summary:       GNU Emacs text editor
 Name:          emacs
 Epoch:         1
 Version:       27.2
-Release:       2%{?dist}
+Release:       3%{?dist}
 License:       GPLv3+ and CC0-1.0
 URL:           http://www.gnu.org/software/emacs/
 Source0:       https://ftp.gnu.org/gnu/emacs/emacs-%{version}.tar.xz
@@ -27,6 +27,7 @@ Patch1:        emacs-spellchecker.patch
 Patch2:        emacs-system-crypto-policies.patch
 Patch3:        emacs-glibc-2.34.patch
 Patch4:        emacs-libdir-vs-systemd.patch
+Patch5:        https://lists.gnu.org/archive/html/bug-gnu-emacs/2021-04/txt0tY7uKvJKS.txt#./emacs-modula2.patch
 
 BuildRequires: gcc
 BuildRequires: atk-devel
@@ -192,6 +193,7 @@ Development header files for Emacs.
 %patch2 -p1 -b .system-crypto-policies
 %patch3 -p1 -b .glibc2.34
 %patch4 -p1 -b .libdir-vs-systemd
+%patch5 -p1
 autoconf
 
 # We prefer our emacs.desktop file
@@ -483,6 +485,10 @@ rm %{buildroot}%{_datadir}/icons/hicolor/scalable/mimetypes/emacs-document23.svg
 %{_includedir}/emacs-module.h
 
 %changelog
+* Mon Apr 26 2021 Dan Čermák <dan.cermak@cgc-instruments.com> - 1:27.2-3
+- Add emacs-modula2.patch
+- Fixes rhbz#1950158
+
 * Sat Mar 27 2021 Peter Oliver <rpm@mavit.org.uk> - 1:27.2-2
 - Prefer upstream systemd service definition.