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https://issues.apache.org/jira/browse/MCOMPILER-333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17714763#comment-17714763
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Marquis Wang commented on MCOMPILER-333:
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I have an example project that shows this:
https://github.com/marquiswang/incremental-compile-dagger-test
> Incremental compilation causes "mvn clean compile compile" to fail
> ------------------------------------------------------------------
>
> Key: MCOMPILER-333
> URL: https://issues.apache.org/jira/browse/MCOMPILER-333
> Project: Maven Compiler Plugin
> Issue Type: Bug
> Affects Versions: 3.7.0
> Reporter: Anthony Vanelverdinghe
> Priority: Major
>
> With <useIncrementalCompilation>true</useIncrementalCompilation>, my build
> fails if I do "mvn clean compile compile". From the
> [comment|https://issues.apache.org/jira/browse/MCOMPILER-205?focusedCommentId=16390065&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16390065]
> in MCOMPILER-205, I understand that incremental compilation deletes the
> "classes" directory. But it seems that it doesn't delete the
> "generated-sources" directory.
> When I do "mvn clean compile" and "mvn compile", the second build fails.
> However, if I delete the "generated-sources" directory between the 2 builds,
> they both succeed.
> So I guess the bug here is that incremental compilation doesn't delete the
> "generated-sources" directory.
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