[Bug 1538284] Re: [SRU] Unescaped left brace in regex is deprecated

[Seyeong Kim]

Hello, Thanks for your cooperation.

Tested on Xenial

1. create xenial instance
2. add proposed repository
3. apt install libpam-runtime
4. apt install postgresql

warnings are gone.

Thanks!

dpkg -l | grep pam
ii  libpam-modules:amd64                1.1.8-3.2ubuntu2                           amd64        Pluggable Authentication Modules for PAM
ii  libpam-modules-bin                  1.1.8-3.2ubuntu2                           amd64        Pluggable Authentication Modules for PAM - helper binaries
ii  libpam-runtime                      1.1.8-3.2ubuntu2.1                         all          Runtime support for the PAM library
ii  libpam-systemd:amd64                229-4ubuntu21.1                            amd64        system and service manager - PAM module
ii  libpam0g:amd64                      1.1.8-3.2ubuntu2                           amd64        Pluggable Authentication Modules library

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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Title:
  [SRU] Unescaped left brace in regex is deprecated

Status in pam package in Ubuntu:
  Fix Released
Status in pam source package in Trusty:
  Won't Fix
Status in pam source package in Xenial:
  Fix Committed
Status in pam source package in Artful:
  Fix Committed
Status in pam package in Debian:
  Fix Released

Bug description:
  [Impact]

  When installing postgresql, many warning msgs are raised
  Please refer to Original Description

  ## Corrections
  In trusty, escaping is missing but not the same symptom. NOT AFFECTED TO TRUSTY

  [Test Case]

  1. create ubuntu instance
  2. apt install postgresql

  [Regression Potentials]
  This change is quite small(just escaping), and it is not code changes but getenv script which made by debian. so risk is minimal in my opinion.

  [Other info]

  Debian Bugs:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=810873
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815595

  [Original Description]

  When installing postgresql on Ubuntu 16.04 (xenial), the following
  warning are raised:

  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.
  Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/(?<!\\)\${ <-- HERE ([^}]+)}/ at /usr/sbin/pam_getenv line 78.

  This is due to the fact that unescaped brace are deprecated in Perl
  5.22.

  # rmadison perl
   perl | 5.18.2-2ubuntu1.3 | trusty-updates   # NOT AFFECTED
   perl | 5.22.1-9ubuntu0.2 | xenial-updates
   perl | 5.26.0-8ubuntu1   | artful
   perl | 5.26.1-5          | bionic

  Info:

  root at xenial:/var/log/imscp# lsb_release
  No LSB modules are available.
  root at xenial:/var/log/imscp# lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu Xenial Xerus (development branch)
  Release:	16.04
  Codename:	xenial

  Howto reproduce:

  aptitude install postgresql

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