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https://issues.apache.org/jira/browse/MNG-6700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17070079#comment-17070079
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Hudson commented on MNG-6700:
-----------------------------
Build succeeded in Jenkins: Maven TLP » maven » MNG-5868 #51
See https://builds.apache.org/job/maven-box/job/maven/job/MNG-5868/51/
> Equal compile source roots are added multiple times
> ---------------------------------------------------
>
> Key: MNG-6700
> URL: https://issues.apache.org/jira/browse/MNG-6700
> Project: Maven
> Issue Type: Bug
> Components: core
> Affects Versions: 3.6.1
> Environment: macOS 10.14.4
> Oracle JDK 1.8.0_212
> Reporter: zhb
> Assignee: Michael Osipov
> Priority: Major
> Fix For: 3.6.2
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> 3.6.1 introduced a bug that same compile source are added multiple times.
> It seems that since 3.6.1, [this
> method|https://github.com/apache/maven/blob/24c762d7c3d66607e620fddb0743c7eadd041107/maven-core/src/main/java/org/apache/maven/project/DefaultProjectBuilder.java#L855]
> is invoked multiple times, thus adding project root directory absolute path
> and "." [in this
> method|https://github.com/apache/maven/blob/0940c7c9730eac23fd8598f3fb51520ee774761b/maven-core/src/main/java/org/apache/maven/project/MavenProject.java#L295]
> twice. Unfortunately, {{new File(basedir, ".").getAbsolutePath()}} doesn't
> equal {{basedir.getAbsolutePath()}} -- the same source roots are added
> multiple times to {{compileSourceRoots}}.
>
> Step to reproduce:
> * git clone [email protected]:gradle/gradle.git
> * cd gradle/.teamcity
> * (With maven 3.6.0) mvn compile - success
> * (WIth maven 3.6.1) mvn compile - failure
> Kotlin compiler complains a lot "Redeclaration: XXXXX".
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