USB Startup Disk Creator crashed with SIGSEGV in g_main_context_prepare()

[Forest]

usb-creator-gtk crashed with a segmentation fault in g_main_context_prepare() while writing a nightly ubuntu saucy iso file to my USB stick. I'll add details to this bug report shortly.
---
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
DistroRelease: Ubuntu 13.04
MarkForUpload: True
NonfreeKernelModules: nvidia
Package: usb-creator (not installed)
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Tags: raring
Uname: Linux 3.8.0-26-generic x86_64
UpgradeStatus: Upgraded to raring on 2013-06-02 (43 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers wireshark

[Forest (foresto)]

apport information

[Forest (foresto)]

apport information

[Forest (foresto)]

apport information

[Forest (foresto)]

apport information

[Forest (foresto)]

Hm... apport seems to be a broken mess on raring (see bug 1071905) and my attempt to fix it only got some of the desired crash info attached to this report. Time for some copy/paste:

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Mon Jul 15 15:52:21 2013
DistroRelease: Ubuntu 13.04
ExecutablePath: /usr/bin/usb-creator-gtk
ExecutableTimestamp: 1363770858
InterpreterPath: /usr/bin/python3.3
ProcCmdline: /usr/bin/python3 /usr/bin/usb-creator-gtk
Signal: 11
Uname: Linux 3.8.0-26-generic x86_64
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers wireshark
ApportVersion: 2.9.2-0ubuntu8.1
Package: usb-creator-gtk 0.2.47
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
SegvAnalysis:
 Segfault happened at: 0x7f067c20f928 <g_main_context_prepare+376>: orl $0x10,0x2c(%rax)
 PC (0x7f067c20f928) ok
 source "$0x10" ok
 destination "0x2c(%rax)" (0x000004fc) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
SourcePackage: usb-creator
StacktraceAddressSignature: /usr/bin/usb-creator-gtk:11:x86_64:/lib/x86_64-linux-gnu/libglib-2.0.so.0.3600.0+490fe:/lib/x86_64-linux-gnu/libglib-2.0.so.0.3600.0+496ba:/usr/lib/x86_64-linux-gnu/libgtk-3.so.0.600.4+18e4a5:/usr/lib/x86_64-linux-gnu/libffi.so.6.0.1+5c18:/usr/lib/x86_64-linux-gnu/libffi.so.6.0.1+5580:/usr/lib/libgirepository-1.0.so.1.0.0+9ce4:/usr/lib/libgirepository-1.0.so.1.0.0+b04b:/usr/lib/python3/dist-packages/gi/_gi.cpython-33m-x86_64-linux-gnu.so+1535a:/usr/bin/python3.3+cfca2:/usr/bin/python3.3+113395:/usr/bin/python3.3+ce667:/usr/bin/python3.3+113395:/usr/bin/python3.3+113d68:/usr/bin/python3.3+e6c5a:/usr/bin/python3.3+e6ec7
StacktraceTop:
 g_main_context_prepare (context=context@entry=0x2637cb0, priority=priority@entry=0x7fff2d0830b8) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3370
 g_main_context_iterate (context=0x2637cb0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3681
 g_main_loop_run (loop=0x29a4e40) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3895
 gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ffi_call_unix64 () at ../src/x86/unix64.S:76
Tags: raring
UpgradeStatus: Upgraded to raring on 2013-06-02 (43 days ago)

[Launchpad Janitor (janitor)]

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