tumblerd crashed with SIGSEGV in g_type_check_instance_is_a()

[col reilly]

clicked 'open container folder' in the firefox download dialogue box.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: tumbler 0.1.25-1
ProcVersionSignature: Ubuntu 3.5.0-3.3-generic 3.5.0-rc5
Uname: Linux 3.5.0-3-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.2.5-0ubuntu2
Architecture: amd64
Date: Sun Jul 8 09:07:51 2012
ExecutablePath: /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd
InstallationMedia: Xubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120620)
ProcCmdline: /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f4db247a29c <g_type_check_instance_is_a+60>: testb $0x4,0x16(%rdi)
 PC (0x7f4db247a29c) ok
 source "$0x4" ok
 destination "0x16(%rdi)" (0x8ea7838ba3818bba) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: tumbler
StacktraceTop:
 g_type_check_instance_is_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 gst_element_seek_simple () from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-gst-thumbnailer.so
 ?? ()
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: tumblerd crashed with SIGSEGV in g_type_check_instance_is_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_a (type_instance=type_instance@entry=0x7f4d9c0a3800, iface_type=<optimized out>) at /build/buildd/glib2.0-2.33.3/./gobject/gtype.c:3964
 gst_element_seek_simple (element=0x7f4d9c0a3800, format=GST_FORMAT_TIME, seek_flags=5, seek_pos=11988688888) at gstutils.c:2420
 ?? () from /tmp/tmpXXgRVa/usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-gst-thumbnailer.so
 ?? ()
 g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.33.3/./glib/gthreadpool.c:309

[Launchpad Janitor (janitor)]

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

[Chascon (chascone)]

It happens to me when downloading a file from Firefox passed onto a line command downloader.

The problem
is not with Firefox or the downloader but as I recall with tumbler daemon, tumblerd if I recall, whose job it is to create images to downloaded files.

Steps to reproduce
-Download media files and you have a case where the daemon is constantly recreating the image to the file because it thinks the growing file is a new file and in need of a new image, constantly. This takes up about 100 of cpu and has been a problem for some years now.
-And no it cr@ps out instead of almost freezing the desktop. And improvement, I wold say.

tumblerd needs to be rethought.

Work-around
Close the file browser, that is presumably opened to the folder where the media file is being downloaded to.