Execution failed for task ':recompileMc'. > java.lang.NullPointerException (no error message)

[Li-nger]

 ./gradlew setupDecompWorkspace
Starting a Gradle Daemon (subsequent builds will be faster)

> Configure project :
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
         ForgeGradle 2.3-SNAPSHOT-ee3e3df
  https://github.com/MinecraftForge/ForgeGradle
#################################################
                 Powered by MCP
             http://modcoderpack.com
     by: Searge, ProfMobius, R4wk, ZeuX
     Fesh0r, IngisKahn, bspkrs, LexManos
#################################################

> Task :recompileMc FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':recompileMc'.
> java.lang.NullPointerException (no error message)

./gradlew setupDecompWorkspace --stacktrace

> Configure project :
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.

> Task :recompileMc FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':recompileMc'.
> java.lang.NullPointerException (no error message)

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':recompileMc'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:59)
        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:59)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:101)
        at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:91)
        at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.run(EventFiringTaskExecuter.java:51)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:46)
        at org.gradle.execution.taskgraph.LocalTaskInfoExecutor.execute(LocalTaskInfoExecutor.java:42)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareWorkItemExecutor.execute(DefaultTaskExecutionGraph.java:273)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareWorkItemExecutor.execute(DefaultTaskExecutionGraph.java:258)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:135)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:130)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.execute(DefaultTaskPlanExecutor.java:200)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.executeWithWork(DefaultTaskPlanExecutor.java:191)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.run(DefaultTaskPlanExecutor.java:130)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: java.lang.NullPointerException
        at net.minecraftforge.gradle.user.TaskRecompileMc.getExtPath(TaskRecompileMc.java:107)
        at net.minecraftforge.gradle.user.TaskRecompileMc.doStuff(TaskRecompileMc.java:82)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:46)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:786)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:753)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:131)        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:120)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:99)
        ... 31 more

 ./gradlew setupDecompWorkspace --info
The client will now receive all logging from the daemon (pid: 15936). The daemon log file: C:\Users\Li\.gradle\daemon\4.9\daemon-15936.out.log
Starting 4th build in daemon [uptime: 26 mins 20.368 secs, performance: 100%, no major garbage collections]
Using 4 worker leases.
Starting Build
Settings evaluated using settings file 'C:\Users\Li\Documents\forge-1.12.2-14.23.4.2757-mdk\settings.gradle'.
Projects loaded. Root project using build file 'C:\Users\Li\Documents\forge-1.12.2-14.23.4.2757-mdk\build.gradle'.
Included projects: [root project 'forge-1.12.2-14.23.4.2757-mdk']

This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
file or directory 'C:\Users\Li\Documents\forge-1.12.2-14.23.4.2757-mdk\src\api\resources', not founde-1.12.2-14.23.4.2757-mdk\build.gradle'.
All projects evaluated.
Selected primary task 'setupDecompWorkspace' from project :
Tasks to be executed: [task ':deobfCompileDummyTask', task ':deobfProvidedDummyTask', task ':getVersionJson', task ':extractUserdev', task ':extractDependencyATs', task ':extractMcpData', task ':extractMcpMappings', task ':genSrgs', task ':downloadClient', task ':downloadServer', task ':splitServerJar', task ':mergeJars', task ':deobfMcSRG', task ':decompileMc', task ':fixMcSources', task ':applySourcePatches', task ':remapMcSources', task ':recompileMc', task ':extractNatives', task ':getAssetIndex', task ':getAssets', task ':makeStart', task ':setupDecompWorkspace']
:deobfCompileDummyTask (Thread[Daemon worker Thread 4,5,main]) started.

> Task :deobfCompileDummyTask
Task ':deobfCompileDummyTask' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
:deobfCompileDummyTask (Thread[Daemon worker Thread 4,5,main]) completed. Took 0.146 secs.
:deobfProvidedDummyTask (Thread[Task worker for ':',5,main]) started.

> Task :deobfProvidedDummyTask
Task ':deobfProvidedDummyTask' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
:deobfProvidedDummyTask (Thread[Task worker for ':',5,main]) completed. Took 0.019 secs.
:getVersionJson (Thread[Task worker for ':',5,main]) started.

> Task :getVersionJson
Task ':getVersionJson' is not up-to-date because:
  Task.upToDateWhen is false.
:getVersionJson (Thread[Task worker for ':',5,main]) completed. Took 1.743 secs.
:extractUserdev (Thread[Task worker for ':',5,main]) started.

> Task :extractUserdev UP-TO-DATE
Skipping task ':extractUserdev' as it is up-to-date.
:extractUserdev (Thread[Task worker for ':',5,main]) completed. Took 0.046 secs.
:extractDependencyATs (Thread[Task worker for ':',5,main]) started.

> Task :extractDependencyATs SKIPPED
Skipping task ':extractDependencyATs' as task onlyIf is false.
:extractDependencyATs (Thread[Task worker for ':',5,main]) completed. Took 0.0 secs.
:extractMcpData (Thread[Task worker for ':',5,main]) started.

> Task :extractMcpData SKIPPED
Skipping task ':extractMcpData' as task onlyIf is false.
:extractMcpData (Thread[Task worker for ':',5,main]) completed. Took 4.414 secs.
:extractMcpMappings (Thread[Task worker for ':',5,main]) started.

> Task :extractMcpMappings SKIPPED
Skipping task ':extractMcpMappings' as task onlyIf is false.
:extractMcpMappings (Thread[Task worker for ':',5,main]) completed. Took 2.742 secs.
:genSrgs (Thread[Task worker for ':',5,main]) started.

> Task :genSrgs SKIPPED
Skipping task ':genSrgs' as task onlyIf is false.
:genSrgs (Thread[Task worker for ':',5,main]) completed. Took 1.143 secs.
:downloadClient (Thread[Task worker for ':',5,main]) started.

> Task :downloadClient SKIPPED
Skipping task ':downloadClient' as task onlyIf is false.
:downloadClient (Thread[Task worker for ':',5,main]) completed. Took 0.667 secs.
:downloadServer (Thread[Task worker for ':',5,main]) started.

> Task :downloadServer SKIPPED
Skipping task ':downloadServer' as task onlyIf is false.
:downloadServer (Thread[Task worker for ':',5,main]) completed. Took 2.718 secs.
:splitServerJar (Thread[Task worker for ':',5,main]) started.

> Task :splitServerJar SKIPPED
Skipping task ':splitServerJar' as task onlyIf is false.
:splitServerJar (Thread[Task worker for ':',5,main]) completed. Took 7.576 secs.
:mergeJars (Thread[Task worker for ':',5,main]) started.

> Task :mergeJars SKIPPED
Skipping task ':mergeJars' as task onlyIf is false.
:mergeJars (Thread[Task worker for ':',5,main]) completed. Took 1.533 secs.

> Task :decompileMc SKIPPED
Skipping task ':decompileMc' as task onlyIf is false.
:decompileMc (Thread[Task worker for ':',5,main]) completed. Took 1.438 secs.
:fixMcSources (Thread[Task worker for ':',5,main]) started. Took 1.417 secs.

> Task :fixMcSources SKIPPED
Skipping task ':fixMcSources' as task onlyIf is false.
:fixMcSources (Thread[Task worker for ':',5,main]) completed. Took 3.204 secs.
:applySourcePatches (Thread[Task worker for ':',5,main]) started.

> Task :applySourcePatches SKIPPED
Skipping task ':applySourcePatches' as task onlyIf is false.
:applySourcePatches (Thread[Task worker for ':',5,main]) completed. Took 1.792 secs.
:remapMcSources (Thread[Task worker for ':',5,main]) started.

> Task :remapMcSources SKIPPED
Skipping task ':remapMcSources' as task onlyIf is false.
:remapMcSources (Thread[Task worker for ':',5,main]) completed. Took 1.17 secs.
:recompileMc (Thread[Task worker for ':',5,main]) started.

> Task :recompileMc
No output file found.
Task ':recompileMc' is not up-to-date because:
  Task has failed previously.

> Task :recompileMc FAILED
:recompileMc (Thread[Task worker for ':',5,main]) completed. Took 36.223 secs.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':recompileMc'.
> java.lang.NullPointerException (no error message)