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http://jira.codehaus.org/browse/MCOMPILER-71?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=199749#action_199749
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Ivan Bogouchev commented on MCOMPILER-71:
-----------------------------------------

We experience the same problem and it seems this is a bug in javac 1.5 : 

  http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6198196




> javac compilation error for package-info.java containing package annotation
> ---------------------------------------------------------------------------
>
>                 Key: MCOMPILER-71
>                 URL: http://jira.codehaus.org/browse/MCOMPILER-71
>             Project: Maven 2.x Compiler Plugin
>          Issue Type: Bug
>    Affects Versions: 2.0.2
>         Environment: Windows XP SP2
> JDK 1.5.0_15
>            Reporter: Gabriel Forro
>         Attachments: compile_error_2.0.2.log
>
>
> The package-info.java files can not be compiled in Maven 2 if the 2.0.2 
> maven-compiler-plugin is used. package-info.java files can be compiled by 
> earlier versions of the maven-compiler-plugin (I have tried 2.0 and 2.0.1). 
> Newer snapshot versions does not work also and it fails in the same error (I 
> have tried version 2.1-snapshot).
> This problem can be caused by an unusual behavior of the javac from jdk 1.5. 
> This behavior is as follows:
> You can not use '/' file separator during compiling package-info.java (for 
> instance "javac sk/forro/package-info.java"). You must use '\' separator (for 
> instance "javac sk\forro\package-info.java"). If you use the '/' separator 
> you get the the compilation error reported by this bug (package annotations 
> should be in file package-info.java). This is javac 'feature' has been 
> removed in jdk 6 and in jdk 6 you can use either '/' or '\' - it does not 
> matter.
> It looks like the maven-compiler-plugin or one of its components (I mean 
> plexus-x artefacts used by maven-compiler-plugin) uses '/' instead of the '\' 
> in the MS Windows environment.
> I have attached a log file of an unsuccessful build (generated by mvn install 
> -X)
> A possible workaround to solve this problem temporarily:
> The compilation successes if I use either an older version of 
> maven-compiler-plugin or jdk 6 or do not use package-info.java files at all.

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