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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MCOMPILER-336) Dependency that should be on modulepath sometime put on classpath
Date Thu, 12 Apr 2018 10:45:00 GMT
Martin Desruisseaux created MCOMPILER-336:
---------------------------------------------

             Summary: Dependency that should be on modulepath sometime put on classpath
                 Key: MCOMPILER-336
                 URL: https://issues.apache.org/jira/browse/MCOMPILER-336
             Project: Maven Compiler Plugin
          Issue Type: Task
    Affects Versions: 3.7.0
            Reporter: Martin Desruisseaux
         Attachments: module-vs-classpath.zip

{{maven-compiler-plugin}} sometime puts modularized dependencies on the {{javac}} {{-classpath}}
option instead than {{-modulepath}}, which cause compilation failure. A test case is attached.
Step to reproduce:

{noformat}
cd module-vs-classpath
cd a
mvn install
cd ../b
mvn clean install
mvn install
{noformat}

The last command fail with the following error message:

{noformat}
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile
(default-compile) on project b: Compilation failure
[ERROR] module not found: test.a
{noformat}

Execution with the {{-X}} option shows that the {{test.a}} dependency is correctly declared
in {{-modulepath}} when executing {{mvn clean install}}, but is wrongly declared in {{-classpath}} when
executing {{mvn install}}.

A workaround is to remove the {{<useIncrementalCompilation>false</useIncrementalCompilation>}}
option in the {{pom.xml}} files, or to execute {{touch src/main/java/module-info.java}} before
{{mvn install}}. However the same error message occurs when attempting to execute {{mvn site}},
for which case I have found no workaround yet (note: the {{mvn site}} problem is not reproduced
by the attached {{module-vs-classpath.zip}} file).



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