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https://issues.apache.org/jira/browse/LUCENE-3877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13231095#comment-13231095
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Dawid Weiss commented on LUCENE-3877:
-------------------------------------
This is possible by verifying where System.out takes place at runtime via stack
analysis. Alternatively a bytecode woven aspect. But at the same time it could
also be a find-and-grep over sources? Comments would have to be removed in the
pipeline prior to grepping for sysouts.
Checking all sysouts/syserrs and verifying stack traces there seems like an
overkill compared to the above.
> Lucene should not call System.out.println
> -----------------------------------------
>
> Key: LUCENE-3877
> URL: https://issues.apache.org/jira/browse/LUCENE-3877
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Michael McCandless
> Fix For: 3.6, 4.0
>
>
> We seem to have accumulated a few random sops...
> Eg, PairOutputs.java (oal.util.fst) and MultiDocValues.java, at least.
> Can we somehow detect (eg, have a test failure) if we accidentally leave
> errant System.out.println's (leftover from debugging)...?
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