Invalid escape sequences in regexes when installing gedit

[Erik Roland van der Meer]

On a clean install of the 24.04 beta, if you do a "sudo apt install gedit", you get the following messages at the end of the install:

/usr/lib/x86_64-linux-gnu/gedit/plugins/externaltools/library.py:212: SyntaxWarning: invalid escape sequence '\-'
  RE_KEY = re.compile('^([a-zA-Z_][a-zA-Z0-9_.\-]*)(\[([a-zA-Z_@]+)\])?$')
/usr/lib/x86_64-linux-gnu/gedit/plugins/snippets/substitutionparser.py:162: SyntaxWarning: invalid escape sequence '\s'
  match = re.match('\\\\?%s\s*' % self.REG_GROUP, tokens)

So there are 2 issues with regexes.

Bug #2055010 reports the first of these, but not the second, and it also reports a different issue as "the huger problem" (one that I can't reproduce). I hope I'm making the right call in opening a new bug report specifically for these regex issues.

Some more details:
- on the clean install, I did apply all available updates before trying to install gedit
- you can also reproduce this issue from the live ("try ubuntu") environment

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gedit 46.2-1build1
ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
Uname: Linux 6.8.0-22-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.496
CloudArchitecture: x86_64
CloudID: nocloud
CloudName: unknown
CloudPlatform: nocloud
CloudSubPlatform: seed-dir (/var/lib/cloud/seed/nocloud)
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 13 08:41:26 2024
LiveMediaBuild: Ubuntu 24.04 LTS "Noble Numbat" - Beta amd64 (20240410.2)
ProcEnviron:
 LANG=C.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: gedit
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[fprietog (fprietog)]

It can also be reproduced reinstalling gedit (in this example in aarch64 architecture):

# apt install --reinstall gedit
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias... Hecho
Leyendo la información de estado... Hecho
0 actualizados, 0 nuevos se instalarán, 1 reinstalados, 0 para eliminar y 0 no actualizados.
Se necesita descargar 353 kB de archivos.
Se utilizarán 0 B de espacio de disco adicional después de esta operación.
Des:1 http://ports.ubuntu.com/ubuntu-ports noble/universe arm64 gedit arm64 46.2-2 [353 kB]
Descargados 353 kB en 0s (1.178 kB/s)
(Leyendo la base de datos ... 221724 ficheros o directorios instalados actualmente.)
Preparando para desempaquetar .../gedit_46.2-2_arm64.deb ...
Desempaquetando gedit (46.2-2) sobre (46.2-2) ...
Configurando gedit (46.2-2) ...
/usr/lib/aarch64-linux-gnu/gedit/plugins/externaltools/library.py:212: SyntaxWarning: invalid escape sequence '\-'
  RE_KEY = re.compile('^([a-zA-Z_][a-zA-Z0-9_.\-]*)(\[([a-zA-Z_@]+)\])?$')
/usr/lib/aarch64-linux-gnu/gedit/plugins/snippets/substitutionparser.py:162: SyntaxWarning: invalid escape sequence '\s'
  match = re.match('\\\\?%s\s*' % self.REG_GROUP, tokens)