Help with editing lights.pk3. Bug ?

[doomsy]

Hello. so i used to do this in earlier versions of Gzdoom and it worked fine.
Now i have a problem when i try to edit lights.pk3.
Im using the latest devbuild.
I also tried to move the gldefs out of the filter folder.

So lets say i want the armor helmet to have a larger glow.

// Armour Helmet
pulselight ARMORBONUS
{
color 0.1 0.3 0.1
size 16
secondarySize 20
interval 1.0
dontlightself 1
attenuate 1
offset 0 10 0
}

Even the smallest edit, "size 20" and "secondarysize 30" will break the whole Gldefs.
When i load it after this small edit, every gldefs are gone.
Im not sure if this is a bug, or if there is a new feature I miss to understand.
Is there anyone who can help me out.
Cheers. Chris