crash when open text file with random value digit character

[GoogleCodeExporter]

What steps will reproduce the problem?
1. use attached file
2. scroll to mid of scroll bar
3.

What is the expected output? What do you see instead?
crash after scroll to mid page

IMPORTANT!!! Please answer these questions for any and ALL bug reports

What version of the product are you using? On what operating system?
version 0.7.20
 OSX mavericks, Darwin Kernel Version 13.1.0

What method of install was your version installed with (Binary/Source)?
binary

If from source: What version of python and wxPython are you using?

Please provide any additional information below.

I built a test file to see if students program would crash when tested with 
random like input. 12 digit numbers peppered with randomly inserted chars 0-127 
value

you would have lost marks for lack of fuzz testing!

( I kid, this software is great! )

Original issue reported on code.google.com by stavraka...@gmail.com on 3 Apr 2014 at 8:22

Attachments:

• t5_10bad.txt

[GoogleCodeExporter]

Will double check on OSX when possible (though my OSX machine is rather old 
10.5), haven't worked on this project in the last year or so (patches welcomed)

File opens and is viewable without issue on Windows 7 when the file is opened 
with Latin-1 encoding.

thanks

Original comment by CodyPrec...@gmail.com on 4 Apr 2014 at 1:33