[Updated] (MCOMPILER-317) Plugin generates wrong modulepath (dependencies listed in wrong order)

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[Updated] (MCOMPILER-317) Plugin generates wrong modulepath (dependencies listed in wrong order)

JIRA jira@apache.org

     [ https://issues.apache.org/jira/browse/MCOMPILER-317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gili updated MCOMPILER-317:
---------------------------
    Summary: Plugin generates wrong modulepath (dependencies listed in wrong order)  (was: Plugin generates modulepath listing dependencies in wrong order)

> Plugin generates wrong modulepath (dependencies listed in wrong order)
> ----------------------------------------------------------------------
>
>                 Key: MCOMPILER-317
>                 URL: https://issues.apache.org/jira/browse/MCOMPILER-317
>             Project: Maven Compiler Plugin
>          Issue Type: Bug
>    Affects Versions: 3.7.0
>         Environment: Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T03:58:13-04:00)
> Maven home: C:\Program Files\apache-maven-3.5.2\bin\..
> Java version: 9.0.1, vendor: Oracle Corporation
> Java home: C:\Program Files\Java\jdk-9.0.1
> Default locale: en_CA, platform encoding: Cp1252
> OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
>            Reporter: Gili
>
> Testcase: https://github.com/cowwoc/maven-java9-class-shadowing
> If a project contains dependencies with the same module name (which is valid according to https://stackoverflow.com/a/46573805/14731) then maven-compile-plugin invokes `javac` with a modulepath containing dependencies in an (apparently) arbitrary order. If I place the project in one directory, I get one order. If I place the project in another directory, I get another order. This is 100% reproducible across multiple runs, across different computers.
> I suspect that somewhere deep inside the code someone is using `HashMap` which is leading to undefined iteration order depending on the path being used.
> Expected behavior: dependencies should be listed in the same order as declared in pom.xml (see https://stackoverflow.com/a/793193/14731)
> Actual behavior: regardless of whether I list `ExtensionPresent` before or after `MyLibrary`, the wrong order gets passed to `javac`.



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