[Bug 1931434] [NEW] Handling of ~/.XCompose broken in 21.04

[Jacco van Schaik]

Public bug reported:

When starting gvim on (X)Ubuntu 21.04 I get a long list of GTK3 error
messages. It starts with

    include in Compose files not supported: include
"/usr/share/X11/locale/en_US.UTF-8/Compose"

and this is followed by a long list of messages like this:

    Need to double-quote the value: "ಠ_ಠ" # LOOK OF DISAPPROVAL:
<Multi_key> <o> <underscore> <o>               : "ಠ_ಠ" # LOOK OF
DISAPPROVAL

... for every compose combo in the .XCompose file. I have attached the
offending .XCompose file.

This used to work in Ubuntu 20.10 but not anymore in 21.04.

I realize this is probably more a GTK3 error than a vim error, but this
is where I encountered it, and I could not find an obvious GTK3 package
to report this under.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: vim-gtk3 2:8.2.2434-1ubuntu1
ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17
Uname: Linux 5.11.0-18-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Wed Jun  9 13:41:16 2021
InstallationDate: Installed on 2017-02-04 (1586 days ago)
InstallationMedia: Xubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
SourcePackage: vim
UpgradeStatus: Upgraded to hirsute on 2021-06-08 (0 days ago)
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=0
mtime.conffile..etc.default.apport: 2017-06-24T17:37:24.020007

** Affects: vim (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug hirsute

** Attachment added: "The .XCompose file that causes the problem."
   https://bugs.launchpad.net/bugs/1931434/+attachment/5503523/+files/.XCompose

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https://bugs.launchpad.net/bugs/1931434

Title:
  Handling of ~/.XCompose broken in 21.04

Status in vim package in Ubuntu:
  New

Bug description:
  When starting gvim on (X)Ubuntu 21.04 I get a long list of GTK3 error
  messages. It starts with

      include in Compose files not supported: include
  "/usr/share/X11/locale/en_US.UTF-8/Compose"

  and this is followed by a long list of messages like this:

      Need to double-quote the value: "ಠ_ಠ" # LOOK OF DISAPPROVAL:
  <Multi_key> <o> <underscore> <o>               : "ಠ_ಠ" # LOOK OF
  DISAPPROVAL

  ... for every compose combo in the .XCompose file. I have attached the
  offending .XCompose file.

  This used to work in Ubuntu 20.10 but not anymore in 21.04.

  I realize this is probably more a GTK3 error than a vim error, but
  this is where I encountered it, and I could not find an obvious GTK3
  package to report this under.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: vim-gtk3 2:8.2.2434-1ubuntu1
  ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17
  Uname: Linux 5.11.0-18-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu65.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: XFCE
  Date: Wed Jun  9 13:41:16 2021
  InstallationDate: Installed on 2017-02-04 (1586 days ago)
  InstallationMedia: Xubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  SourcePackage: vim
  UpgradeStatus: Upgraded to hirsute on 2021-06-08 (0 days ago)
  modified.conffile..etc.default.apport:
   # set this to 0 to disable apport, or to 1 to enable it
   # you can temporarily override this with
   # sudo service apport start force_start=1
   enabled=0
  mtime.conffile..etc.default.apport: 2017-06-24T17:37:24.020007

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