Bugzilla Bug 25429

List of activation functions for the neuron is not displayed any more. I gues
it
happened after update of XFree86 4.2 -> 4.3. After some diging in the source, I
found out that the list of functions is loaded properly, but the list control
is
either not created, or is not resized properly.

Reproducible: Always
Steps to Reproduce:
1. emerge snns
2. Load some network file (e.g.: snns
/usr/share/doc/snns-4.2-r2/examples/xor.net)
3. On the main window click Display and Info buttons.
4. Select some connection between neurons, by draging the mouse from source
neuron to destionation with middle mouse button pressed (e.g.: from 1 to 3)
5. In the Info windows select one of the options menus and choose 'change
activation function' entry.

Actual Results:  
Window with empty list appears.

Expected Results:  
See window with a list of possible activation functions.

It seems that the problem is somwhere within xgui/sources/ui_mainP.c
ui_editPopup function.

Would be nice if you could provide some patch... looks like the package is
unmaintained upstream, no release for quite a while. I'll ask on the SNNS
mailing list if someone perhaps already has some solution.

Reported the problem upstream, asked on the list. Stay tuned.

No reaction so far :-(

I have some good news and some bad news.

Bad news first: snns code is quite a mess, for example it uses lots of static buffers without doing correct size checks.

Good news follow: I found out that the problem you mentioned does not happen when you link with libXaw3d instead of libXaw. I also increased some buffer sizes which should make it less likely to crash when entering directories with lots of entries. Please give snns-4.2-r3 a try when it's available with your mirror.