It seems there is a memory corruption somewhere.

The problem can be reproduced quite easily, just do:

1) Start Lazarus
2) Go to Environment -> CodeTools defines editor
3) Resize the windows slowly - either horizontally or vertically. Watch the treeview in upper part of the form.
4) Once the treeview reaches 0 size in either axis, crash occurs - invalid floating operation.

I tried to trace the problem with gdb, and it says it crashes at gtkcallback.inc, line 1919 (case of vertical scroll) - but that line is relatively inoccent. Looking at variables at that point, the values there are seemingly random, which I tend to believe is corrupted memory.

This appers under Linux and GTK, fpc 1.0.7

Michal

Now if I could refrain from hitting CTRL-whatever it is I hit that sent that message prematurely I would be doing better...

True to my idea of documenting everything I go through with Lazarus from start to finish as a new user, I've just completed my first HOWTO that covers getting a new install up and running.

Sure, these things are covered on the Lazarus site, but I wanted to put it in my own words and keep all of my notes together on my own site.

http://tony.maro.net/mod.php?mod=userpage&page_id=17

If anyone finds anything they think is outright wrong, let me know.

Next I'll cover HOWTO store program settings in an XML file.

Thanks for the how-to, I've been meaning to give it a go but just haven't had the time to put together the steps from the various sources.

bear

True to my idea of documenting all the steps I go through with Lazarus, from start to finish, I've completed my first HOWTO.

- Don't panic. No corrupted memory.
- The round function has problems of converting maximum values.
- The bug was in the TCustomTreeView code, mixing integer and cardinal.
- Fixed.

Mattias