Time: 7/16/18 1:28 AM
Description: Exception in server tick loop

java.lang.AssertionError: TRAP
	at net.minecraft.server.v1_12_R1.ItemStack.F(ItemStack.java:117)
	at net.minecraft.server.v1_12_R1.ItemStack.setCount(ItemStack.java:879)
	at net.minecraft.server.v1_12_R1.PlayerInteractManager.a(PlayerInteractManager.java:440)
	at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1055)
	at net.minecraft.server.v1_12_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:26)
	at net.minecraft.server.v1_12_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:5)
	at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.md718278$lambda$ensureMainThread$0$0(PlayerConnectionUtils.java:523)
	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:1965)
	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:427)
	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:764)
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:662)
	at java.lang.Thread.run(Thread.java:748)


A detailed walkthrough of the error, its code path and all known details is as follows: