java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified by insertion or removal or a custom language embedding was created.TS.modCount=9, tokenList.modCount()=10, rootModCount=10
Please report a bug against a module that calls lexer's code e.g. java, php etc. but not the lexer module itself.
   at org.netbeans.api.lexer.TokenSequence.checkValid(TokenSequence.java:805)
   at org.netbeans.api.lexer.TokenSequence.move(TokenSequence.java:679)
   at com.junichi11.netbeans.php.enhancements.editor.completion.ParameterCompletionProvider$AsyncCompletionQueryImpl.query(ParameterCompletionProvider.java:126)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)