scratch-text-editor crashes with SIGSEGV in g_utf8_validate() on opening files with insufficient permissions

[Sergey "Shnatsel" Davidoff]

If you try to open a file which you don't have permission to read in Scratch, it will crash.

Steps to reproduce:
1) echo "test" > testfile
2) chmod 600 testfile
3) chown root testfile
4) scratch-text-editor testfile

ProblemType: Crash
DistroRelease: elementary OS 0.2
Package: scratch-text-editor 2.0~r1088-0+pkg45~precise1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.2.0-45.70-generic 3.2.44
Uname: Linux 3.2.0-45-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.2+elementary3~precise1
Architecture: amd64
CrashDB: scratch_text_editor
Date: Sun Jun 9 23:18:33 2013
ExecutablePath: /usr/bin/scratch-text-editor
GsettingsChanges:

InstallationMedia: elementary OS 0.2 "Luna" - Daily amd64 (20130601)
MarkForUpload: True
ProcCmdline: scratch-text-editor /etc/cjdroute.conf
ProcEnviron:
 SHELL=/bin/bash
 TERM=xterm
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f34741fc208 <g_utf8_validate+488>: movzbl (%rdi),%r8d
 PC (0x7f34741fc208) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%r8d" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: scratch-text-editor
StacktraceTop:
 g_utf8_validate () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 g_simple_async_result_complete () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: scratch-text-editor crashed with SIGSEGV in g_utf8_validate()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo