Invalid TextBuffer iterator

[ch01 <ch01 cout gmail com>]

Hi, I get an error when inserting and scrolling the Gtk::TextBuffer, when i
get the error the program sometimes crashes. This is the error i get:

 Gtk-WARNING **: Invalid text buffer iterator: either the iterator is
uninitialized, or the characters/pixbufs/widgets in the buffer have been
modified since the iterator was created.
You must use marks, character numbers, or line numbers to preserve a
position across buffer modifications.
You can apply tags and insert marks without invalidating your iterators,
but any mutation that affects 'indexable' buffer contents (contents that can
be referred to by character offset)
will invalidate all outstanding iterators

---------------------------------------------------------------------------------------
Here's my source code: http://pastebin.com/jrVCU8pm.
I have tried all my best to fix it, but i just couldn't. Any sort of help
would be appreciated. 

-- 
View this message in context: http://old.nabble.com/Invalid-TextBuffer-iterator-tp34769943p34769943.html
Sent from the Gtkmm mailing list archive at Nabble.com.