Bug#1121561: libc++-19-dev: breaks libc++1-19, not just libc++1

Witold Baryluk witold.baryluk at gmail.com
Fri Nov 28 18:35:53 GMT 2025


Package: libc++abi-19-dev
Version: 1:19.1.7-10.1
Followup-For: Bug #1121561
X-Debbugs-Cc: witold.baryluk at gmail.com

Dear Maintainer,


similar (but not exactly the same), on my side:


user at debian:~/tmp-live-build$ sudo apt dist-upgrade --purge  -V
The following packages were automatically installed and are no longer required:
   libgpgme11t64 (1.24.2-3)
   libgpgmepp6t64 (1.24.2-3)
   libunwind-19-dev (1:19.1.7-10.1)
   llvm-libunwind1
   node-uri-js (4.4.0+dfsg-9)
   python3-sphinx-copybutton (0.5.2-3)
   qml6-module-org-kde-kholidays (6.18.0-1)
Use 'sudo apt autoremove' to remove them.

Upgrading:
...
   libc++-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   libc++abi-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   libclang-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   libclang-common-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   libclang-cpp19 (1:19.1.7-10.1 => 1:19.1.7-18)
   libclang-cpp19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   libclang-rt-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   libclang1-19 (1:19.1.7-10.1 => 1:19.1.7-18)
   libclc-19 (1:19.1.7-10.1 => 1:19.1.7-18)
   libclc-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
...
   liblldb-19 (1:19.1.7-10.1 => 1:19.1.7-18)
   libllvm19 (1:19.1.7-10.1 => 1:19.1.7-18)
   libllvm19:i386 (1:19.1.7-10.1 => 1:19.1.7-18)
...
   lld-19 (1:19.1.7-10.1 => 1:19.1.7-18)
   lldb-19 (1:19.1.7-10.1 => 1:19.1.7-18)
   llvm-19 (1:19.1.7-10.1 => 1:19.1.7-18)
   llvm-19-dev (1:19.1.7-10.1 => 1:19.1.7-18)
   llvm-19-linker-tools (1:19.1.7-10.1 => 1:19.1.7-18)
   llvm-19-runtime (1:19.1.7-10.1 => 1:19.1.7-18)
   llvm-19-tools (1:19.1.7-10.1 => 1:19.1.7-18)
...

Installing dependencies:
   knighttime (6.5.3-1)
   libc++1 (1:21.1.5-1)
   libc++abi1 (1:21.1.5-1)
   libomp5 (1:21.1.5-1)
   llvm-libunwind1 (1:21.1.5-1)

REMOVING:
   libc++1-19* (1:19.1.7-10.1)
   libc++abi1-19* (1:19.1.7-10.1)
   libomp5-19* (1:19.1.7-10.1)
   libunwind-19* (1:19.1.7-10.1)

Summary:
  Upgrading: 621, Installing: 5, Removing: 4, Not Upgrading: 0
  Download size: 0 B / 645 MB
  Freed space: 30.9 MB

Continue? [Y/n] y
Extracting templates from packages: 100%
Preconfiguring packages ...
(Reading database ... 1643824 files and directories currently installed.)
Preparing to unpack .../libc++-19-dev_1%3a19.1.7-18_amd64.deb ...
Unpacking libc++-19-dev (1:19.1.7-18) over (1:19.1.7-10.1) ...
dpkg: error processing archive /var/cache/apt/archives/libc++-19-dev_1%3a19.1.7-18_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/llvm-19/lib/libc++.so.1', which is also in package libc++1-19 (1:19.1.7-10.1)
Preparing to unpack .../libc++abi-19-dev_1%3a19.1.7-18_amd64.deb ...
Unpacking libc++abi-19-dev (1:19.1.7-18) over (1:19.1.7-10.1) ...
dpkg: error processing archive /var/cache/apt/archives/libc++abi-19-dev_1%3a19.1.7-18_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/llvm-19/lib/libc++abi.so.1', which is also in package libc++abi1-19 (1:19.1.7-10.1)
Errors were encountered while processing:
 /var/cache/apt/archives/libc++-19-dev_1%3a19.1.7-18_amd64.deb
 /var/cache/apt/archives/libc++abi-19-dev_1%3a19.1.7-18_amd64.deb
needrestart is being skipped since dpkg has failed
Error: Sub-process /usr/bin/dpkg returned an error code (1)



-- System Information:
Debian Release: forky/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.17.8 (SMP w/32 CPU threads; PREEMPT)
Kernel taint flags: TAINT_CPU_OUT_OF_SPEC, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libc++abi-19-dev depends on:
ii  libc++abi1-19  1:19.1.7-10.1

libc++abi-19-dev recommends no packages.

libc++abi-19-dev suggests no packages.

-- no debconf information



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