gnome-software crashed with SIGSEGV in g_type_check_instance_is_fundamentally_a()

[Paul Smith]

Test Case:
1. Open https://snapcraft.io/store in a webbrowser
2. Search for discord and select the entry
3. Click on Install

Expected result
It installs discord.

Actual Result
This crash

== Original description ==

Searched for "evolution" then asked to install it (fresh install of Ubuntu 17.10, running Gnome session, not Unity, on Wayland). Gnome-software crashed.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: gnome-software 3.26.1-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CurrentDesktop: GNOME
Date: Sat Oct 21 17:50:23 2017
ExecutablePath: /usr/bin/gnome-software
InstallationDate: Installed on 2017-10-21 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
InstalledPlugins:
 gnome-software-plugin-flatpak N/A
 gnome-software-plugin-limba N/A
 gnome-software-plugin-snap 3.26.1-0ubuntu2
ProcCmdline: /usr/bin/gnome-software --gapplication-service
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fbdb2b78cd7 <g_type_check_instance_is_fundamentally_a+7>: mov (%rdi),%rdx
 PC (0x7fbdb2b78cd7) ok
 source "(%rdi)" (0x1900000000) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-software
StacktraceTop:
 g_type_check_instance_is_fundamentally_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libsoup-2.4.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/libsoup-2.4.so.1
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-software crashed with SIGSEGV in g_type_check_instance_is_fundamentally_a()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x1900000000, fundamental_type=fundamental_type@entry=80) at ../../../../gobject/gtype.c:4023
 g_object_unref (_object=0x1900000000) at ../../../../gobject/gobject.c:3227
 soup_socket_properties_unref (props=0x7fbd842e6b00) at soup-socket-properties.c:60
 soup_connection_finalize (object=0x557de05f2250) at soup-connection.c:72
 g_object_unref (_object=0x557de05f2250) at ../../../../gobject/gobject.c:3330

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Eli Boaz (eli-boaz)]

This happened after i clicked on a link from snapcraft.io to install discord.