When I put a torch on the bottom side of the block, the game crashes. Here's the code I got:
Unreported exception thrown!
java.lang.IllegalArgumentException: Cannot set property avz

{name=facing, clazz=class ei, values=[up, north, south, west, east]}

to down on block minecraft:torch, it is not an allowed value
at avn$a.a(SourceFile:184)
at atj.a(SourceFile:129)
at afx.a(SourceFile:45)
at ahl.a(SourceFile:178)
at bqt.a(SourceFile:356)
at bgu.ay(SourceFile:1453)
at bgu.aB(SourceFile:1961)
at bgu.aA(SourceFile:1772)
at bgu.t(SourceFile:1616)
at bgu.aw(SourceFile:959)
at bgu.a(SourceFile:399)
at net.minecraft.client.main.Main.main(SourceFile:123)