When i try to build my mod, this appears in the console.

Help, thank you

C:\Users\rafael\Documents\Mods>gradlew build --stacktrace
****************************
Powered By MCP:
http://modcoderpack.com/
Searge, ProfMobius, Fesh0r,
R4wk, ZeuX, IngisKahn, bspkrs
MCP Data version : snapshot_20141130
****************************
:compileApiJava UP-TO-DATE
:processApiResources UP-TO-DATE
:apiClasses UP-TO-DATE
:sourceMainJava
:compileJava
warning: [options] bootstrap class path not set in conjunction with -source 1.6
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
:processResources
:classes
:jar
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:extractMcpData UP-TO-DATE
:getVersionJson
:extractUserDev UP-TO-DATE
:genSrgs SKIPPED
:reobf FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':reobf'.
> MALFORMED

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

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':reobf'.

        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.ex
ecuteActions(ExecuteActionsTaskExecuter.java:69)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.ex
ecute(ExecuteActionsTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExec
uter.execute(PostExecutionAnalysisTaskExecuter.java:35)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.exec
ute(SkipUpToDateTaskExecuter.java:64)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execut
e(ValidatingTaskExecuter.java:58)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecu
ter.execute(SkipEmptySourceFilesTaskExecuter.java:42)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter
.execute(SkipTaskWithNoActionsExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execut
e(SkipOnlyIfTaskExecuter.java:53)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter
.execute(ExecuteAtMostOnceTaskExecuter.java:43)
        at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailur
e(AbstractTask.java:296)
        at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorW
orker.executeTask(AbstractTaskPlanExecutor.java:79)
        at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorW
orker.processTask(AbstractTaskPlanExecutor.java:63)
        at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorW
orker.run(AbstractTaskPlanExecutor.java:51)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(Defaul
tTaskPlanExecutor.java:23)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(Defau
ltTaskGraphExecuter.java:86)
        at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTask
ExecutionAction.java:29)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecute
r.java:61)
        at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExec
uter.java:23)
        at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecu
ter.java:67)
        at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildEx
ecutionAction.java:32)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecute
r.java:61)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecute
r.java:54)
        at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(Default
GradleLauncher.java:148)
        at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradle
Launcher.java:105)
        at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLaun
cher.java:85)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildCon
troller.run(InProcessBuildActionExecuter.java:81)
        at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.jav
a:33)
        at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.jav
a:24)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProce
ssBuildActionExecuter.java:39)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProce
ssBuildActionExecuter.java:29)
        at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
        at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.jav
a:171)
        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.
execute(CommandLineActionFactory.java:237)
        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.
execute(CommandLineActionFactory.java:210)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRunti
meValidationAction.java:35)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRunti
meValidationAction.java:24)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(
CommandLineActionFactory.java:206)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(
CommandLineActionFactory.java:169)
        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionRep
ortingAction.java:33)
        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionRep
ortingAction.java:22)
        at org.gradle.launcher.Main.doAction(Main.java:33)
        at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
        at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBoots
trap.java:54)
        at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.j
ava:35)
        at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
        at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.ja
va:30)
        at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
        at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:56)
Caused by: java.lang.IllegalArgumentException: MALFORMED
        at net.md_5.specialsource.Jar.collectJarFiles(Jar.java:169)
        at net.md_5.specialsource.Jar.init(Jar.java:229)
        at net.md_5.specialsource.Jar.init(Jar.java:206)
        at net.minecraftforge.gradle.tasks.user.reobf.ObfArtifact.applySpecialSo
urce(ObfArtifact.java:387)
        at net.minecraftforge.gradle.tasks.user.reobf.ObfArtifact.generate(ObfAr
tifact.java:350)
        at net.minecraftforge.gradle.tasks.user.reobf.ReobfTask.doTask(ReobfTask
.java:317)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskF
actory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:218)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskF
actory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:211)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskF
actory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:200)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(Abstra
ctTask.java:570)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(Abstra
ctTask.java:553)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.ex
ecuteAction(ExecuteActionsTaskExecuter.java:80)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.ex
ecuteActions(ExecuteActionsTaskExecuter.java:61)
        ... 47 more


BUILD FAILED

Total time: 24.404 secs

C:\Users\*****\Documents\Mods>

Ok, thank you anyways :*(