I can reproduce this in precise as well. Here is a slightly better backtrace:
1) gdb nautilus 2) run Computer:// 3) Double click a partition in the nautilus window 4) Following backtrace: (gdb) run Computer:// Starting program: /usr/bin/nautilus Computer:// [Thread debugging using libthread_db enabled] [New Thread 0xb68feb70 (LWP 14782)] [New Thread 0xb60fdb70 (LWP 14783)] [New Thread 0xb58d3b70 (LWP 14784)] Initializing nautilus-gdu extension GLib-GObject-CRITICAL **: g_value_get_pointer: assertion `G_VALUE_HOLDS_POINTER (value)' failed Program received signal SIGSEGV, Segmentation fault. g_str_hash (v=0x0) at /build/buildd/glib2.0-2.31.4.tested/./glib/ghash.c:1661 1661 /build/buildd/glib2.0-2.31.4.tested/./glib/ghash.c: No such file or directory. in /build/buildd/glib2.0-2.31.4.tested/./glib/ghash.c (gdb) bt #0 g_str_hash (v=0x0) at /build/buildd/glib2.0-2.31.4.tested/./glib/ghash.c:1661 #1 0xb7374a38 in g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x0, hash_table=0x8783ee8) at /build/buildd/glib2.0-2.31.4.tested/./glib/ghash.c:385 #2 g_hash_table_lookup (hash_table=0x8783ee8, key=0x0) at /build/buildd/glib2.0-2.31.4.tested/./glib/ghash.c:1058 #3 0xb50493b9 in gdu_pool_get_by_object_path (pool=0x832acf0, object_path=0x0) at gdu-pool.c:2217 #4 0xb50479b6 in device_changed_signal_handler (proxy=0x87e4090, object_path=0x0, user_data=0x832acf0) at gdu-pool.c:1528 #5 0xb7444f8a in g_cclosure_marshal_VOID__POINTER (closure=0x87ce5a0, return_value=0x0, n_param_values=2, param_values=0x87ec5c0, invocation_hint=0xbfffee90, marshal_data=0x0) at /build/buildd/glib2.0-2.31.4.tested/./gobject/gmarshal.c:609 #6 0xb502017a in marshal_dbus_message_to_g_marshaller (closure=0x87ce5a0, return_value=0x0, n_param_values=3, param_values=0x87d4048, invocation_hint=0xbfffee90, marshal_data=0x0) at dbus-gproxy.c:1734 #7 0xb7442dac in g_closure_invoke (closure=0x87ce5a0, return_value=0x0, n_param_values=3, param_values=0x87d4048, invocation_hint=0xbfffee90) at /build/buildd/glib2.0-2.31.4.tested/./gobject/gclosure.c:774 #8 0xb74540c5 in signal_emit_unlocked_R (node=0x82be698, detail=2861, instance=0x87e4090, emission_return=0x0, instance_and_params=0x87d4048) at /build/buildd/glib2.0-2.31.4.tested/./gobject/gsignal.c:3302 #9 0xb745b942 in g_signal_emit_valist (instance=0x87e4090, signal_id=220, detail=2861, var_args=0xbffff044 "") at /build/buildd/glib2.0-2.31.4.tested/./gobject/gsignal.c:3033 #10 0xb745bad3 in g_signal_emit (instance=0x87e4090, signal_id=220, detail=2861) at /build/buildd/glib2.0-2.31.4.tested/./gobject/gsignal.c:3090 #11 0xb5020820 in dbus_g_proxy_emit_remote_signal (message=0x8427ce0, proxy=<optimized out>) at dbus-gproxy.c:1787 #12 dbus_g_proxy_manager_filter (user_data=0x87c98d0, message=0x8427ce0, connection=<optimized out>) at dbus-gproxy.c:1354 #13 dbus_g_proxy_manager_filter (connection=0x87d0568, message=0x8427ce0, user_data=0x87c98d0) at dbus-gproxy.c:1195 #14 0xb693e441 in dbus_connection_dispatch () from /lib/i386-linux-gnu/libdbus-1.so.3 #15 0xb50189ad in message_queue_dispatch (source=0x878fb98, callback=0, user_data=0x0) at dbus-gmain.c:90 #16 0xb738528a in g_main_dispatch (context=0x81f3b80) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:2513 #17 g_main_context_dispatch (context=0x81f3b80) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:3050 #18 0xb7385695 in g_main_context_iterate (dispatch=1, block=-1220988880, context=0x81f3b80, self=<optimized out>) user_data=0x0) at dbus-gmain.c:90 #16 0xb738528a in g_main_dispatch (context=0x81f3b80) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:2513 #17 g_main_context_dispatch (context=0x81f3b80) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:3050 #18 0xb7385695 in g_main_context_iterate (dispatch=1, block=-1220988880, context=0x81f3b80, self=<optimized out>) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:3121 #19 g_main_context_iterate (context=0x81f3b80, block=-1220988880, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:3058 #20 0xb7385771 in g_main_context_iteration (context=0x81f3b80, may_block=1) at /build/buildd/glib2.0-2.31.4.tested/./glib/gmain.c:3182 #21 0xb753862c in g_application_run (application=0x81c5c08, argc=2, argv=0xbffff374) at /build/buildd/glib2.0-2.31.4.tested/./gio/gapplication.c:1548 #22 0x08067ae4 in ?? () #23 0xb7178113 in __libc_start_main (main=0x8067a20, argc=2, ubp_av=0xbffff374, init=0x8158bd0, fini=0x8158c40, rtld_fini=0xb7feebc0, stack_end=0xbffff36c) at libc-start.c:226 #24 0x08067b1d in ?? () Backtrace stopped: Not enough registers or memory available to unwind further The NULL object_path above when libgdu receives the DeviceChanged signal from udisks seems to be the cause, but interestingly, running: dbus-monitor --system "type='signal',sender='org.freedesktop.UDisks',interface='org.freedesktop.UDisks'" I get: signal sender=org.freedesktop.DBus -> dest=:1.81 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired string ":1.81" signal sender=:1.54 -> dest=(null destination) serial=389 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceJobChanged object path "/org/freedesktop/UDisks/devices/sda4" boolean true string "FilesystemMount" uint32 1000 boolean false double -1 signal sender=:1.54 -> dest=(null destination) serial=393 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceChanged object path "/org/freedesktop/UDisks/devices/sda4" signal sender=:1.54 -> dest=(null destination) serial=395 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceJobChanged object path "/org/freedesktop/UDisks/devices/sda4" boolean false string "" uint32 0 boolean false double -1 So the object path would seem to be non-NULL when udisks emits it. Strange. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/908787 Title: nautilus crashed with SIGSEGV in g_str_hash() Status in “nautilus” package in Ubuntu: Confirmed Bug description: I can see there are old duplicates of this bug title, with upstream bugs marked obsolete. Yet, this happened on current Precise. I was clicking on a disk icon to have it mounted. I was able to reproduce it once by unmounting the disk in the dock, then double-clicking on it in a "Computer" window. ProblemType: Crash DistroRelease: Ubuntu 12.04 Package: nautilus 1:3.2.1-2ubuntu4 ProcVersionSignature: Ubuntu 3.2.0-6.12-generic-pae 3.2.0-rc6 Uname: Linux 3.2.0-6-generic-pae i686 ApportVersion: 1.90-0ubuntu1 Architecture: i386 Date: Mon Dec 26 15:16:34 2011 ExecutablePath: /usr/bin/nautilus InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20111225) ProcCmdline: nautilus -n ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SegvAnalysis: Segfault happened at: 0xb6ba534a <g_str_hash+10>: movzbl (%ecx),%edx PC (0xb6ba534a) ok source "(%ecx)" (0x00000000) not located in a known VMA region (needed readable region)! destination "%edx" ok SegvReason: reading NULL VMA Signal: 11 SourcePackage: nautilus StacktraceTop: g_str_hash () from /lib/i386-linux-gnu/libglib-2.0.so.0 g_hash_table_lookup () from /lib/i386-linux-gnu/libglib-2.0.so.0 gdu_pool_get_by_object_path () from /usr/lib/i386-linux-gnu/libgdu.so.0 ?? () from /usr/lib/i386-linux-gnu/libgdu.so.0 g_cclosure_marshal_VOID__POINTER () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 Title: nautilus crashed with SIGSEGV in g_str_hash() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/908787/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp