** Summary changed:

- gnome-software crashed with SIGSEGV in as_ref_string_unref()
+ gnome-software crashed with SIGSEGV in as_ref_string_unref()  → 
as_node_yaml_destroy_node_cb → g_node_traverse_pre_order → g_node_traverse → 
as_yaml_unref

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https://bugs.launchpad.net/bugs/1760793

Title:
  gnome-software crashed with SIGSEGV in as_ref_string_unref()  →
  as_node_yaml_destroy_node_cb → g_node_traverse_pre_order →
  g_node_traverse → as_yaml_unref

Status in appstream-glib package in Ubuntu:
  New
Status in gnome-software package in Ubuntu:
  New

Bug description:
  Don't know what happened but I got this error. Sorry guys.

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: gnome-software 3.28.0-0ubuntu7
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Apr  3 09:29:50 2018
  ExecutablePath: /usr/bin/gnome-software
  InstallationDate: Installed on 2017-12-21 (102 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    3.28.0-0ubuntu7
  ProcCmdline: /usr/bin/gnome-software --gapplication-service
  SegvAnalysis:
   Segfault happened at: 0x7fc65d1d8699 <as_ref_string_unref+9>:        mov    
-0x4(%rdi),%eax
   PC (0x7fc65d1d8699) ok
   source "-0x4(%rdi)" (0x0000002f) not located in a known VMA region (needed 
readable region)!
   destination "%eax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: gnome-software
  StacktraceTop:
   as_ref_string_unref () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8
   ?? () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  Title: gnome-software crashed with SIGSEGV in as_ref_string_unref()
  UpgradeStatus: Upgraded to bionic on 2018-04-01 (1 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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