gedit crashed with SIGSEGV in g_utf8_validate()

[Kevin]

Binary package hint: gedit

gedit crashes when opening an empty file.

I enabled apport to report this bug as this comment suggests.
https://bugs.launchpad.net/ubuntu/+source/gedit/+bug/577584/comments/2
(But I did it temporarily by running 'sudo service apport start force_start=1' command).

1. create an empty file by right-clicking on the file browser and choosing 'create document' then 'empty file'.
2. double-click on the file to open
3. gedit runs and crashes immediately (The gedit window disappears).

I tried in the terminal as well and got the following message.
$ gedit anEmptyFile
(gedit:14929): GLib-GIO-CRITICAL **: g_converter_convert: assertion `outbuf_size > 0' failed
Segmentation fault

I'm using Ubuntu Linux 10.04 (Lucid Lynx) Desktop (64bit). It's upgraded from 9.10.
The version of gedit is 2.30.2.

$ lsb_release -rd
Description: Ubuntu 10.04 LTS
Release: 10.04

$ apt-cache policy gedit
gedit:
  Installed: 2.30.2-0ubuntu1
  Candidate: 2.30.2-0ubuntu1
  Version table:
 *** 2.30.2-0ubuntu1 0
        500 http://au.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
        100 /var/lib/dpkg/status
     2.30.0git20100413-0ubuntu1 0
        500 http://au.archive.ubuntu.com/ubuntu/ lucid/main Packages

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: gedit 2.30.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
Architecture: amd64
Date: Sun May 9 20:48:21 2010
ExecutablePath: /usr/bin/gedit
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
ProcCmdline: gedit anEmptyFile
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_AU.utf8
SegvAnalysis:
 Segfault happened at: 0x7f8cbe106512 <g_utf8_validate+18>: cmpb $0x0,(%rdi)
 PC (0x7f8cbe106512) ok
 source "$0x0" ok
 destination "(%rdi)" (0x00000000) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: gedit
StacktraceTop:
 g_utf8_validate () from /lib/libglib-2.0.so.0
 ?? ()
 ?? () from /usr/lib/libgio-2.0.so.0
 ?? () from /usr/lib/libgio-2.0.so.0
 ?? () from /usr/lib/libgio-2.0.so.0
Title: gedit crashed with SIGSEGV in g_utf8_validate()
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 IA__g_utf8_validate (str=0x0,
 ?? ()
 g_converter_input_stream_read (
 read_async_thread (res=0x1b35460,
 run_in_thread (job=<value optimized out>,

[Kevin (kevinshlee)]

I found that it happens if the first encoding charset to be detected is not 'UTF-8'.
I added 'UHC' to /apps/gedit-2/preferences/encodings/auto_detected through the configuration editor (gconf-editor) about one year ago and have been using it since then.
So the values I have are [UHC,UTF-8,CURRENT,ISO-8859-15,UTF-16]. I had to set the UHC before any other charsets as otherwise gedit doesn't detect UHC charset properly and displays the text in UTF-8.

So if I set UTF-8 before any other charsets, gedit does not crash even if I open an empty file. Otherwise, it does. I hope this would be some help.

Regards,
Kevin

[Pedro Villavicencio (pedro)]

I cannot reproduce the issue, looks like it's fixed with the latest update, can you please update your gedit package and try to reproduce the crash again? Thanks.

[MichaelB (mrbou)]

gedit 2.30.2-0ubuntu1 is the latest version and i didn't see a new one in proposed..

I read the comment #5 and i tested something..

My default setting "auto_detect" encoding start with ISO-8859-1 and with this gedit crash when a new empty file is created.
If a change this setting with "auto_detect" UTF-8 is OK i can open a empty file without crash

[MichaelB (mrbou)]

Ok with this setting...

[Kevin (kevinshlee)]

I do still have this bug and the version is the same as MichaelB's (2.30.2-0ubuntu1).

[Pedro Villavicencio (pedro)]

Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.