gEdit hangs when searching a minimized css file

[Carroarmato0]

I tried searching for "ps_main" using the Search function in gEdit and it just hung on me.

Steps to reproduce:

1) start gedit
2) open de supplied css file
3) notice that for a file that's just 217,6kB big, and has 217630 lines, it load a bit slow
4) Use the search function to find "ps_main"
5) notice gedit hanging up, the program gets darkened due to not responding

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gedit 3.6.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-22.34-generic 3.5.7.2
Uname: Linux 3.5.0-22-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
Date: Fri Jan 25 22:18:11 2013
InstallationDate: Installed on 2012-12-05 (51 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: gedit
UpgradeStatus: No upgrade log present (probably fresh install)

[thinkpad (fellowsgarden)]

related to this https://live.gnome.org/Gedit/FAQ ?

gedit is very slow and/or crashes when opening files with very long lines. Can you fix it?

When designing GtkTextView (the text display widget of gtk+ which gedit uses) the developers had to make a design decision: trading off bad performance and memory use on corner cases like very long lines in exchange for better performance in search operations and full support for UTF-8 text. This is a known limitation of GtkTextView and cannot be fixed. On top of that Pango seems to use a lot of CPU drawing such long lines. This may be fixable, but it isn't easy... Feel free to give it a try. Crashes with long lines are usually due to out-of-memory conditions, but if that's not the case then we would like to know about it.

------------

I think I've suffered from the long-line issue a lot, and have used leafpad (and am about to try geany) as a more reliable alternative; don't get me wrong: if gedit were reliably stable and would not become UNUSABLE for certain documents, I'd have zero complaints about it...

[Launchpad Janitor (janitor)]

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

[Stan Williams (stanwmusic)]

I noticed it lockong up first last night when i opened some CSS files and again tonight I opened a file named bootstrap.min.css which is 117.3 kB.
Gedit immediately froze up again. I have to use System Monitor to kill it when it does that.

[damien (gognoscranes)]

This bug is also present in 14.04. With my minified css file, what i searched for was irrelevant, it always resulted in Gedit crashing with SIGSEGV gtk_iter_forward_to_tag_toggle() Renaming the file to .html from .css gedit no longer crashed.