Bug#1104550: debian-cd: fails to create user when keyboard layout is specified as Turkish Q

Package: debian-cd
Version: 3.2.1
Severity: normal
X-Debbugs-Cc: [email protected]

Dear Maintainer,

I was trying to install Debian testing on my computer. I picked Turkish Q keyboard layout,
as that is my laptop's layout. I then used a username which has only latin characters,
and a password which only contains numbers. I picked GNOME as my desktop environment.
The rest of the configuration went fine.

However, when I rebooted the machine to log in, I found out that the user I defined was not created.
I later tried the same installation using an American keyboard layout, which went as expected.
I entered my credentials and successfully logged in, in this case.

-- System Information:
Debian Release: trixie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.22-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages debian-cd depends on:
ii  apt                        3.0.0
ii  bc                         1.07.1-4
ii  bzip2                      1.0.8-6
ii  cpp                        4:14.2.0-1
pn  curl                       <none>
pn  dpkg-dev                   <none>
pn  grep-dctrl                 <none>
pn  libcompress-zlib-perl      <none>
pn  libdigest-md5-perl         <none>
pn  libdpkg-perl               <none>
pn  libfile-slurp-perl         <none>
pn  libyaml-libyaml-perl       <none>
ii  lynx                       2.9.2-1
pn  make                       <none>
ii  perl [libdigest-sha-perl]  5.40.1-3
pn  pigz                       <none>
pn  tofrodos                   <none>
pn  uuid-runtime               <none>
ii  wget                       1.25.0-2
pn  xorriso | genisoimage      <none>

Versions of packages debian-cd recommends:
ii  dosfstools       4.2-1.2
pn  hfsutils         <none>
pn  isolinux         <none>
pn  mtools           <none>
pn  syslinux-common  <none>

debian-cd suggests no packages.