shwesh

I'm trying to compile a mod https://github.com/gegy1000/Terrarium, it is not mine. It keeps failing with: * What went wrong: Execution failed for task ':deobfMcMCP'. > java.util.zip.ZipException: duplicate entry: net/minecraft/command/AdvancementCommand$Mode.class Running with --debug and going to the relevant output gives me: 19:56:40.686 [DEBUG] [org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter] Determining if task ':deobfMcMCP' is up-to-date 19:56:40.707 [INFO] [org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter] Executing task ':deobfMcMCP' (up-to-date check took 0.012 secs) due to: No history is available. 19:56:40.716 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter] Executing actions for task ':deobfMcMCP'. 19:56:40.730 [LIFECYCLE] [org.gradle.api.Task] Applying SpecialSource... 19:56:41.064 [INFO] [org.gradle.api.Task] Using AccessTransformers... 19:56:41.080 [INFO] [org.gradle.api.Task] C:\Users\shwes\.gradle\caches\minecraft\net\minecraftforge\forge\1.12-14.21.0.2331\userdev\merged_at.cfg 19:57:09.101 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':deobfMcMCP' 19:57:09.117 [LIFECYCLE] [class org.gradle.TaskExecutionLogger] :deobfMcMCP FAILED I've tried running it as gradlew build and gradlew clean build and tried it on both windows 10 and debian stretch. there doesn't seem to be any documentation that I can find on it. Running gradlew test fails with the same error.