pacman crashed with SIGSEGV in __libc_start_main()

[Chris Ng]

reported by UI.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: xscreensaver-data-extra 5.15-3ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
Uname: Linux 3.13.0-61-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: MATE
Date: Tue Aug 4 13:34:02 2015
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/xscreensaver/pacman
InstallationDate: Installed on 2014-09-04 (333 days ago)
InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140723)
ProcCmdline: pacman -root
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x4084bf: cmp 0xdb8(%rdi),%esi
 PC (0x004084bf) ok
 source "0xdb8(%rdi)" (0x0211e004) not located in a known VMA region (needed readable region)!
 destination "%esi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: xscreensaver
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 __libc_start_main (main=0x4027f0, argc=2, argv=0x7ffceb287578, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7ffceb287568) at libc-start.c:287
Title: pacman crashed with SIGSEGV in __libc_start_main()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo wireshark

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1196251, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.