java.lang.StringIndexOutOfBoundsException: String index out of range: -1
   at java.lang.String.substring(String.java:1937)
   at java.lang.String.subSequence(String.java:1972)
   at org.netbeans.modules.php.editor.FSCompletion$1$1.run(FSCompletion.java:141)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:200)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:197)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:160)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:227)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:66)
Caused: org.netbeans.modules.parsing.spi.ParseException
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:205)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.php.editor.FSCompletion$1.query(FSCompletion.java:113)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)