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https://issues.apache.org/jira/browse/LUCENE-6740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698246#comment-14698246
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Uwe Schindler commented on LUCENE-6740:
---------------------------------------
I backported the last fix also to 5.3 branch, because the inability to
regenerate java classes from jflex grammars is a blocker (the generated code
did not even compile because of missing classes!!!)
> Reduce warnings emitted by javac in Java 7/Java 8
> -------------------------------------------------
>
> Key: LUCENE-6740
> URL: https://issues.apache.org/jira/browse/LUCENE-6740
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Labels: Java7, Java8
> Fix For: Trunk, 5.4
>
>
> This is a overview issue about improvements to reduce warnings during the
> build. Since we moved trunk to Java 8 and branch_5x to Java 7, there were
> introduced some additional warnings, mostly in generated code.
> ANTLR4 does automatically add the needed @SuppressWarnings, but jflex does
> not. There are also some rawtypes warnings, which changed in Java 7 (before
> Java 7 there were only "unsafe" warnings, now you need both.
> I enabled the Warnings tracker in Policeman Jenkins, we can therefore very
> easily check the warnings: e.g. on trunk:
> http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Linux/ (see diagram on the
> right), you can click on it, e.g.
> http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Linux/warnings4
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