[Bug 1971547] Re: [SRU] cyradm fails on jammy

[Dave Jones]

Confirmed issue only exists on jammy (no later series need patching).
Patch looks reasonable and minimal for an SRU fix. Sponsoring (with
trivial fix to maintainer address in d/control now that the version
number includes an ubuntu component).

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https://bugs.launchpad.net/bugs/1971547

Title:
  [SRU] cyradm fails on jammy

Status in cyrus-imapd package in Ubuntu:
  Fix Released
Status in cyrus-imapd source package in Jammy:
  Confirmed

Bug description:
  [ Impact ]

  cyradm is completely unusable as it will fail with an error whenever
  any user tries to run "cyradm".

  $ cyradm 
  Can't load '/usr/lib/x86_64-linux-gnu/perl5/5.34/auto/Cyrus/IMAP/IMAP.so' for module Cyrus::IMAP: /usr/lib/x86_64-linux-gnu/perl5/5.34/auto/Cyrus/IMAP/IMAP.so: undefined symbol: pcreposix_regexec at /usr/lib/x86_64-linux-gnu/perl-base/DynaLoader.pm line 187.
   at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Admin.pm line 43.
  Compilation failed in require at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Admin.pm line 43.
  BEGIN failed--compilation aborted at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Admin.pm line 43.
  Compilation failed in require at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Shell.pm line 59.
  BEGIN failed--compilation aborted at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Shell.pm line 59.
  Compilation failed in require at /usr/bin/cyradm line 66.
  BEGIN failed--compilation aborted at /usr/bin/cyradm line 66.

  
  [ Test Plan ]

  * Execute "cyradm"
  * if its not fixed then it will fail as the error above
  * With fixed package we will reach the "cyradm" prompt as shown below:

  $ cyradm 
  cyradm>

  [ Where problems could occur ]

  There was no change in the code or build dependencies. The only change is in the Makefile to explicitely link IMAP.so with libpcre3 so that Perl Dynaloader does not try to find the symbols from the latest libpcre2.
  Its already completely unusable, the chances of regression more than "completely unusable" are very less.

  [ Other Info ]

  Upstream has added changes to support latest libpcre2 but the diff of
  the patches to add the support is already big and on top of that it
  will need 2 more fixes. So the total diff and also the fact that it
  will then change the dependencies and will start using a new library
  was (imho) inappropriate for SRU.

  [ Original Bug Description ]

  Running cyradm fails:

  root at imap ~# cyradm 127.0.0.1
  Can't load '/usr/lib/x86_64-linux-gnu/perl5/5.34/auto/Cyrus/IMAP/IMAP.so' for module Cyrus::IMAP: /usr/lib/x86_64-linux-gnu/perl5/5.34/auto/Cyrus/IMAP/IMAP.so: undefined symbol: pcreposix_regexec at /usr/lib/x86_64-linux-gnu/perl-base/DynaLoader.pm line 187.
   at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Admin.pm line 43.
  Compilation failed in require at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Admin.pm line 43.
  BEGIN failed--compilation aborted at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Admin.pm line 43.
  Compilation failed in require at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Shell.pm line 59.
  BEGIN failed--compilation aborted at /usr/lib/x86_64-linux-gnu/perl5/5.34/Cyrus/IMAP/Shell.pm line 59.
  Compilation failed in require at /usr/bin/cyradm line 66.
  BEGIN failed--compilation aborted at /usr/bin/cyradm line 66.

  I think this is due to an imcompatibility between versions of libpcre,
  out of my depth commenting further but there's a discussion here:
  https://www.spinics.net/lists/info-cyrus/msg20361.html reporting the
  problem in Debian Testing. I have a Debian Bullseye Cyrus IMAP server
  which works fine.

  I have:

  root at imap ~# dpkg -l | grep pcre
  ii  libpcre2-32-0:amd64 10.39-3build1 amd64 New Perl Compatible Regular Expression Library - 32 bit runtime files
  ii  libpcre2-8-0:amd64 10.39-3build1 amd64 New Perl Compatible Regular Expression Library- 8 bit runtime files
  ii  libpcre3:amd64 2:8.39-13build5 amd64 Old Perl 5 Compatible Regular Expression Library - runtime files

  This is a fresh install of 22.04 with little else installed but:

  root at imap ~# dpkg -l | grep cyrus
  ii  cyrus-admin 3.4.3-3build2 amd64 Cyrus mail system - administration tools
  ii  cyrus-caldav 3.4.3-3build2 amd64 Cyrus mail system - CalDAV and CardDAV support
  ii  cyrus-clients 3.4.3-3build2 amd64 Cyrus mail system - test clients
  ii  cyrus-common 3.4.3-3build2 amd64 Cyrus mail system - common files
  ii  cyrus-imapd 3.4.3-3build2 amd64 Cyrus mail system - IMAP support
  ii  libcyrus-imap-perl:amd64 3.4.3-3build2 amd64 Interface to Cyrus imap client imclient library

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