pacman crashed with SIGSEGV in __libc_start_main()

[Chris Ng]

pacman screensaver does not work

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: Thu Aug 20 20:00:12 2015
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/xscreensaver/pacman
InstallationDate: Installed on 2014-09-04 (350 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)" (0x017c6008) 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=0x7ffe5f88d8f8, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7ffe5f88d8e8) 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
XsessionErrors:
 (process:6665): Indicator-Power-WARNING **: Fail to query backlight devices.
 (zeitgeist-datahub:6669): GLib-GObject-WARNING **: invalid (NULL) pointer instance
 (zeitgeist-datahub:6669): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
 (polkit-mate-authentication-agent-1:6871): GLib-WARNING **: GChildWatchSource: Exit status of a child process was requested but ECHILD was received by waitpid(). Most likely the process is ignoring SIGCHLD, or some other thread is invoking waitpid() with a nonpositive first argument; either behavior can break applications that use g_child_watch_add()/g_spawn_sync() either directly or indirectly.

[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.