An error occurred during parsing of 'C:\Users\Gili\Documents\guava-jdk8\src\main\java\org\bitbucket\cowwoc\guava\stream\GuavaCollectors.java'. Please report a bug against java/source and attach dump file 'C:\Users\Gili\AppData\Roaming\NetBeans\dev\var\log\GuavaCollectors_21.dump'.
Caused: java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:126)
   at com.sun.tools.javac.util.Assert.check(Assert.java:45)
   at com.sun.tools.javac.comp.Infer$IncorporationStep$7.apply(Infer.java:807)
   at com.sun.tools.javac.comp.Infer.checkWithinBounds(Infer.java:556)
   at com.sun.tools.javac.comp.Infer$GraphSolver.solve(Infer.java:1582)
   at com.sun.tools.javac.comp.Infer$InferenceContext.solve(Infer.java:2205)
   at com.sun.tools.javac.comp.Infer$InferenceContext.solveAny(Infer.java:2234)
   at com.sun.tools.javac.comp.DeferredAttr$DeferredAttrContext.complete(DeferredAttr.java:515)
   at com.sun.tools.javac.comp.Infer.instantiateMethod(Infer.java:184)
   at com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:572)
   at com.sun.tools.javac.comp.Resolve.checkMethod(Resolve.java:609)
   at com.sun.tools.javac.comp.Attr.checkMethod(Attr.java:4013)
   at com.sun.tools.javac.comp.Attr.checkIdInternal(Attr.java:3795)
   at com.sun.tools.javac.comp.Attr.checkMethodIdInternal(Attr.java:3702)
   at com.sun.tools.javac.comp.Attr.checkMethodId(Attr.java:3679)
   at com.sun.tools.javac.comp.Attr.checkId(Attr.java:3667)
   at com.sun.tools.javac.comp.Attr.visitNewClass(Attr.java:2076)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1522)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.visitReturn(Attr.java:1702)
   at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1390)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:657)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1130)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:915)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1014)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitMethodDef(NBAttr.java:76)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:784)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4560)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4462)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4390)
   at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4365)
   at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1317)
   at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1290)
   at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:469)
   at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:448)
   at org.netbeans.modules.java.source.parsing.JavacParser.moveToPhase(JavacParser.java:641)
   at org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:496)
   at org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:162)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callGetResult(TaskProcessor.java:631)
   at org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:262)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:798)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)