Using SpongeForge 2137 with Forge 2228 (and tested with earlier Sponge and Forge too) on Quark r1.2-79 I get the following crash, does not happen with r1.2-77

https://hastebin.com/xicalesaho.sql

Ah, an ASM incompatibility. How fun. You may have to report this one to sponge.

Relative code for the piston class: https://github.com/Vazkii/Quark/blob/master/src/main/java/vazkii/quark/base/asm/ClassTransformer.java#L350-L372

Ok, I'll make an issue on Sponge's GitHub linking to this.

The issue has been fixed in Sponge.

@Vazkii: Thanks for pointing out the transformer code.