** Description changed:

- This problem happens randomly on ubuntu 12.10
+ This problem happens randomly on ubuntu 12.10, as of the updates to
+ quantal and quantal-proposed on September 20.  Nautilus did not change
+ in these upgrades.  Glib and libdbusmenu did, and those libraries are
+ both prominent in the stacktrace.  (I can't tell yet which is really the
+ culprit, so, excuse my imprecision, I'm adding them both to the report.)
  
  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: nautilus 1:3.5.90.really.3.4.2-0ubuntu2
  ProcVersionSignature: Ubuntu 3.5.0-15.22-generic 3.5.4
  Uname: Linux 3.5.0-15-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.5.2-0ubuntu4
  Architecture: amd64
  Date: Thu Sep 20 18:47:08 2012
  ExecutablePath: /usr/bin/nautilus
  GsettingsChanges: b'org.gnome.nautilus.window-state' b'geometry' 
b"'800x550+564+24'"
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120917)
  ProcCmdline: nautilus -n
  ProcEnviron:
-  LANGUAGE=en_CA:en
-  PATH=(custom, no user)
-  LANG=en_CA.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_CA:en
+  PATH=(custom, no user)
+  LANG=en_CA.UTF-8
+  SHELL=/bin/bash
  SegvAnalysis:
-  Segfault happened at: 0x7f38128b2e8c <g_type_check_instance_cast+28>:        
mov    (%rax),%rbp
-  PC (0x7f38128b2e8c) ok
-  source "(%rax)" (0x700000008) not located in a known VMA region (needed 
readable region)!
-  destination "%rbp" ok
+  Segfault happened at: 0x7f38128b2e8c <g_type_check_instance_cast+28>:        
mov    (%rax),%rbp
+  PC (0x7f38128b2e8c) ok
+  source "(%rax)" (0x700000008) not located in a known VMA region (needed 
readable region)!
+  destination "%rbp" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: nautilus
  StacktraceTop:
-  g_type_check_instance_cast () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
-  ?? () from /usr/lib/x86_64-linux-gnu/libdbusmenu-gtk3.so.4
-  g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
-  ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
-  g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
+  g_type_check_instance_cast () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
+  ?? () from /usr/lib/x86_64-linux-gnu/libdbusmenu-gtk3.so.4
+  g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
+  ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
+  g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: nautilus crashed with SIGSEGV in g_type_check_instance_cast()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

** Also affects: libdbusmenu (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: glib2.0 (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1053670

Title:
  nautilus crashed with SIGSEGV in g_type_check_instance_cast()

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