Minecraft crashed when I right clicked an Inductive Automation Fluid Tank with a lava bucket. I'm posting this here since the exception occurred in Quark code, but may be a problem at their end instead. I'll be submitting a bug report at their end too.

Here are the important bits:

java.lang.AbstractMethodError
    at vazkii.quark.base.handler.DropoffHandler.isValidChest(DropoffHandler.java:106)
    at vazkii.quark.management.feature.ChestButtons.initGui(ChestButtons.java:57)
...
    at cd4017be.lib.BlockGuiHandler.openGui(BlockGuiHandler.java:74)
    at cd4017be.lib.ModTileEntity.onActivated(ModTileEntity.java:57)
    at cd4017be.lib.TileBlock.func_180639_a(TileBlock.java:180)
...

crash report: crash-2016-07-01_19.52.16-client.txt
latest.log: latest.log.txt

Edit: Quark-beta-35.jar, Forge 12.18.0.2005, Minecraft 1.10.2

Update IA.

Or their lib mod for that matter, this is a clone of CD4017BE/CD4017BE_lib#3