python2.7 crashed with SIGSEGV

[Brian]

Ubuntu 16.04 AMD64 Desktop

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: python2.7-minimal 2.7.11-7
ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
Uname: Linux 4.4.0-17-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
Date: Mon Apr 4 19:13:09 2016
ExecutablePath: /usr/bin/python2.7
InstallationDate: Installed on 2016-04-04 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
ProcCmdline: python ubuntu-after-install.py
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 LANGUAGE=en_US
 SHELL=/bin/bash
 TERM=unknown
Signal: 11
SourcePackage: python2.7
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
Title: python2.7 crashed with SIGSEGV
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 gtk_css_node_init_matcher (matcher=0x7f53ce8e6bd0, cssnode=0x16334c0) at /build/gtk+3.0-lL7YRg/gtk+3.0-3.18.9/./gtk/gtkcssnode.c:1309
 gtk_css_node_create_style (cssnode=0x16334c0) at /build/gtk+3.0-lL7YRg/gtk+3.0-3.18.9/./gtk/gtkcssnode.c:329
 gtk_css_node_real_update_style (cssnode=0x16334c0, change=60129541945, timestamp=0, style=0x1539720) at /build/gtk+3.0-lL7YRg/gtk+3.0-3.18.9/./gtk/gtkcssnode.c:384
 gtk_css_node_ensure_style (cssnode=cssnode@entry=0x16334c0, current_time=0) at /build/gtk+3.0-lL7YRg/gtk+3.0-3.18.9/./gtk/gtkcssnode.c:923

[Marc Deslauriers (mdeslaur)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

[Barry Warsaw (barry)]

Very likely it's not a bug in Python, but in some extension module, e.g. from the looks of the stacktrace gtk.