java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified: modCount=762 != upToDateModCount=763
Please report against caller's module which needs to be fixed (not the lexer module).
   at org.netbeans.api.lexer.TokenSequence.checkModCount(TokenSequence.java:748)
   at org.netbeans.api.lexer.TokenSequence.moveNext(TokenSequence.java:454)
   at org.netbeans.modules.php.editor.verification.UnusedVariableHint$VariablesHeap.getOffsetAfterBlockCurlyOpen(UnusedVariableHint.java:207)
   at org.netbeans.modules.php.editor.verification.UnusedVariableHint$VariablesHeap.resolveInScopeOffset(UnusedVariableHint.java:195)
   at org.netbeans.modules.php.editor.verification.UnusedVariableHint$VariablesHeap.addNodeUsage(UnusedVariableHint.java:184)
   at org.netbeans.modules.php.editor.verification.UnusedVariableHint$CheckVisitor.processNode(UnusedVariableHint.java:140)
   at org.netbeans.modules.php.editor.verification.UnusedVariableHint$CheckVisitor.visit(UnusedVariableHint.java:128)
   at org.netbeans.modules.php.editor.parser.astnodes.FormalParameter.accept(FormalParameter.java:117)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:54)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:61)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.visit(DefaultVisitor.java:230)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultTreePathVisitor.visit(DefaultTreePathVisitor.java:309)
   at org.netbeans.modules.php.editor.parser.astnodes.FunctionDeclaration.accept(FunctionDeclaration.java:116)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:54)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.visit(DefaultVisitor.java:300)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultTreePathVisitor.visit(DefaultTreePathVisitor.java:374)
   at org.netbeans.modules.php.editor.parser.astnodes.MethodDeclaration.accept(MethodDeclaration.java:77)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:54)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:61)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.visit(DefaultVisitor.java:100)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultTreePathVisitor.visit(DefaultTreePathVisitor.java:199)
   at org.netbeans.modules.php.editor.parser.astnodes.Block.accept(Block.java:96)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:54)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.visit(DefaultVisitor.java:131)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultTreePathVisitor.visit(DefaultTreePathVisitor.java:224)
   at org.netbeans.modules.php.editor.parser.astnodes.ClassDeclaration.accept(ClassDeclaration.java:90)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:54)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.scan(DefaultVisitor.java:61)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultVisitor.visit(DefaultVisitor.java:326)
   at org.netbeans.modules.php.editor.parser.astnodes.visitors.DefaultTreePathVisitor.visit(DefaultTreePathVisitor.java:399)
   at org.netbeans.modules.php.editor.parser.astnodes.Program.accept(Program.java:92)
   at org.netbeans.modules.php.editor.verification.UnusedVariableHint.computeHintsImpl(UnusedVariableHint.java:112)
   at org.netbeans.modules.php.editor.verification.PHPHintsProvider.computeHints(PHPHintsProvider.java:95)
   at org.netbeans.modules.csl.hints.infrastructure.HintsTask$1.run(HintsTask.java:126)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:649)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:217)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:214)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:71)
Caused: org.netbeans.modules.parsing.spi.ParseException
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:222)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.csl.hints.infrastructure.HintsTask.run(HintsTask.java:88)
   at org.netbeans.modules.csl.hints.infrastructure.HintsTask.run(HintsTask.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:624)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:801)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)