When using any Hammer from Gobber2 crashes the game when the target block is a non-solid block from BetterNether.

E.g: Using the End Hammer targeting Red Mold.

i think i fixed it
a fix will be in next release

quick note, it also seems to happen when targeting other blocks, for example, mushroom block. I'm not sure if your fix will correct the problem globally but I thought it was worth mentioning.