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https://issues.apache.org/jira/browse/NETBEANS-564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16429096#comment-16429096
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Eirik Bakke commented on NETBEANS-564:
--------------------------------------

I can confirm that the error occurs when opening 
org.netbeans.modules.subversion.util.NotifyHtmlPanel (and many other form files 
in other projects). A similar bug was reported at 
https://issues.apache.org/jira/browse/NETBEANS-430 , but the interesting thing 
in this one is that the error has been reproduced in a project that's _not_ a 
maven project.

> Opening .form/.java file raises exception from java parser
> ----------------------------------------------------------
>
>                 Key: NETBEANS-564
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-564
>             Project: NetBeans
>          Issue Type: Bug
>          Components: java - Source
>    Affects Versions: 9.0
>            Reporter: Matthias Bläsing
>            Priority: Major
>         Attachments: NotifyHtmlPanel.dump
>
>
> h2. Error
> When opening a .form/.java file combination I get an exception, that is 
> raised from the java parser:
> {noformat}
> Annotation: An error occurred during parsing of 
> '/tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java'. Please 
> report a bug against java/source and attach dump file 
> '/home/matthias/src/incubator-netbeans/nbbuild/testuserdir/var/log/NotifyHtmlPanel.dump'.
> Annotation: An error occurred during parsing of 
> '/tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java'. Please 
> report a bug against java/source and attach dump file 
> '/home/matthias/src/incubator-netbeans/nbbuild/testuserdir/var/log/NotifyHtmlPanel.dump'.
> Annotation: An error occurred during parsing of 
> '/tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java'. Please 
> report a bug against java/source and attach dump file 
> '/home/matthias/src/incubator-netbeans/nbbuild/testuserdir/var/log/NotifyHtmlPanel.dump'.
> Annotation: An error occurred during parsing of 
> '/tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java'. Please 
> report a bug against java/source and attach dump file 
> '/home/matthias/src/incubator-netbeans/nbbuild/testuserdir/var/log/NotifyHtmlPanel.dump'.
> An error occurred during parsing of 
> '/tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java'. Please 
> report a bug against java/source and attach dump file 
> '/home/matthias/src/incubator-netbeans/nbbuild/testuserdir/var/log/NotifyHtmlPanel.dump'.
> An error occurred during parsing of 
> '/tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java'. Please 
> report a bug against java/source and attach dump file 
> '/home/matthias/src/incubator-netbeans/nbbuild/testuserdir/var/log/NotifyHtmlPanel.dump'.
> Caused: 
> org.netbeans.modules.java.source.parsing.FileObjects$InvalidFileException: 
> Invalid or deleted file: 
> /tmp/vcs-1522660054567/vcs-1522660054568/NotifyHtmlPanel.java
>     at 
> org.netbeans.modules.java.source.parsing.FileObjects.sourceFileObject(FileObjects.java:354)
>     at 
> org.netbeans.modules.java.source.parsing.FileObjects.sourceFileObject(FileObjects.java:334)
> Caused: java.lang.IllegalArgumentException
>     at 
> org.netbeans.modules.java.source.parsing.FileObjects.sourceFileObject(FileObjects.java:337)
>     at 
> org.netbeans.modules.java.source.parsing.JavacParser.createJavacTask(JavacParser.java:730)
>     at 
> org.netbeans.modules.java.source.parsing.CompilationInfoImpl.getJavacTask(CompilationInfoImpl.java:374)
> [catch] at 
> org.netbeans.modules.java.source.parsing.JavacParser.moveToPhase(JavacParser.java:580)
>     at 
> org.netbeans.modules.java.source.parsing.CompilationInfoImpl.toPhase(CompilationInfoImpl.java:361)
>     at 
> org.netbeans.api.java.source.CompilationController.toPhase(CompilationController.java:84)
>     at 
> org.netbeans.modules.java.JavaNode$IconTask$SourceIcon$1.run(JavaNode.java:443)
>     at 
> org.netbeans.modules.java.JavaNode$IconTask$SourceIcon$1.run(JavaNode.java:440)
>     at 
> org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:501)
>     at 
> org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
>     at 
> org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:130)
>     at 
> org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:114)
>     at 
> org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:181)
>     at 
> org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:178)
>     at 
> org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
>     at 
> org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
>     at 
> org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
>     at 
> org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
>     at 
> org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:178)
>     at 
> org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:81)
>     at 
> org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:451)
>     at 
> org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:422)
>     at 
> org.netbeans.modules.java.JavaNode$IconTask$SourceIcon.computeIcon(JavaNode.java:440)
>     at org.netbeans.modules.java.JavaNode$IconTask.run(JavaNode.java:402)
>     at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
>     at 
> org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
>     at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
>     at 
> org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
> Caused: org.openide.util.RequestProcessor$FastItem: task failed due 
> to{noformat}
> The resulting dump file is attached.
> h2. Steps to reproduce
> This is on Ubuntu linux with Oracle JDK 10 - not sure if that is a part of 
> the problem. I used git master as of 2018-04-01 
> (54c60bed3f197bb99d42f007f1fa314a9a30cd5c).
>  * run: ant tryme
>  * open the subversion module in the git checkout
>  * open org.netbeans.modules.subversion.util.NotifyHtmlPanel
> I looks as if this stops happening after scanning is done. Could this be a 
> race condition?



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