Newb: how to use lantern or torch to "fuel" a light source?

[Quirk]

Originally Posted by animal_waves

I was also confused by this, as the in game Mallorn torch description states it's possible (in v1.5.0.):

N:411:& Mallorn Torch~
G:~:U
I:39:3:0
W:1:0:10:2
P:0:0d0:0:0d0:0
A:3/4:6/2
F:NO_SMITHING | EASY_KNOW
D:The wood of the mallorn burns bright but briefly.
D: You can equip it as a light source with a radius of 3 squares.
D: It may also be used to fuel another wooden torch, up to a
D: maximum of 100 turns of light

Ah that seems like a bug. Thanks for catching that.