Three-way incompatibility makes /gs hand command error out (GrS + DummyCore + VintageFix)

[Wizzerinus]

After a hour of trial and error, I've reduced the set of required mods to the following:

Mixin Booter 9.1
GroovyScript 1.1.2
Dummy Core Unofficial 2.4.112.5
Vintage Fix 0.5.0
---
Universal Tweaks 1.11.0 (optional, triggers without it)
ConfigAnytime 3.0 (if UT is installed)

With these mods installed, attempting to /gs hand any item (I tried with oak leaves) triggers an error and the client says "Unknown error when executing the command":

java.lang.ClassCastException: net.minecraft.creativetab.CreativeTabs$2 cannot be cast to com.cleanroommc.groovyscript.core.mixin.CreativeTabsAccessor
	at com.cleanroommc.groovyscript.helper.ingredient.GroovyScriptCodeConverter.asGroovyCode(GroovyScriptCodeConverter.java:162) ~[GroovyScriptCodeConverter.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.InfoParserCreativeTab.text(InfoParserCreativeTab.java:24) ~[InfoParserCreativeTab.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.InfoParserCreativeTab.text(InfoParserCreativeTab.java:8) ~[InfoParserCreativeTab.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.GenericInfoParser.copyText(GenericInfoParser.java:119) ~[GenericInfoParser.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.GenericInfoParser.information(GenericInfoParser.java:143) ~[GenericInfoParser.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.GenericInfoParser.iterate(GenericInfoParser.java:154) ~[GenericInfoParser.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.GenericInfoParser.add(GenericInfoParser.java:168) ~[GenericInfoParser.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.GenericInfoParser.add(GenericInfoParser.java:177) ~[GenericInfoParser.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.InfoParserCreativeTab.parse(InfoParserCreativeTab.java:32) ~[InfoParserCreativeTab.class:?]
	at com.cleanroommc.groovyscript.compat.vanilla.command.infoparser.GenericInfoParser.parse(GenericInfoParser.java:213) ~[GenericInfoParser.class:?]
	at com.cleanroommc.groovyscript.api.infocommand.InfoParserPackage.lambda$parse$0(InfoParserPackage.java:178) ~[InfoParserPackage.class:?]
	at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_412]
	at com.cleanroommc.groovyscript.api.infocommand.InfoParserPackage.parse(InfoParserPackage.java:178) ~[InfoParserPackage.class:?]
	at com.cleanroommc.groovyscript.command.BaseInfoCommand.func_184881_a(BaseInfoCommand.java:145) ~[BaseInfoCommand.class:?]
	at net.minecraftforge.server.command.CommandTreeBase.func_184881_a(CommandTreeBase.java:164) ~[CommandTreeBase.class:?]
	at net.minecraft.command.CommandHandler.func_175786_a(CommandHandler.java:119) [bj.class:?]
	at net.minecraft.command.CommandHandler.func_71556_a(CommandHandler.java:91) [bj.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:962) [pa.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:941) [pa.class:?]
	at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [la.class:?]
	at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [la.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_412]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_412]
	at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185) [chd.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:1817) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:750) [?:1.8.0_412]

[brachy84]

Can not reproduce

[Wizzerinus]

Will re-test this the next week

[Wizzerinus]

Reproduced with a clean Forge 2860 install with updated mod versions (used /gs looking):

MixinBooter 9.3
GroovyScript 1.1.3
VintageFix 0.5.1
Dummy Core Unofficial 2.4.112.5

No config changes or anything as that's a clean install. Also reproduced with Forge 2847 as I believe that's what dev env uses, just in case.

[Wizzerinus]

Note: dev env doesn't reproduce this, even with the jars being put into the folder rather than using Maven dependencies.