bug#68930: 30.0.50; Emacs conflates C-Ω and C-ω

[Alexander Prähauser]

Emacs confuses C-ω and C-Ω. This seems to happen regardless of the init file.
For instance, if started with a basic init containing only the lines

(define-key global-map (kbd "C-ω") 'kill-region)
(define-key global-map (kbd "C-Ω") 'copy-to-register)

the commands are recalled by exactly the reversed key combinations, C-Ω
kills and C-ω copies to register. Both Ω and ω are here in the xkb-map
of the keyboard layout as unicode characters, U03A9 and U03C9
respectively. I tried using C-Ω and C-ω as key combinations for commands
in the Firefox-plugin Tridactyl to see if it confuses them as well, but
it seems to be able to distinguish them.


In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, cairo version
 1.18.0) of 2023-12-29 built on Archlaptop
Repository revision: 291763feca34174290345055a6748436839f7606
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101010
System Description: Arch Linux

Configured using:
 'configure --with-x-toolkit=no'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY OLDXMENU PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: VTerm

Minor modes in effect:
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  undelete-frame-mode: t
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Load-path shadows:
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