larry-cable opened a new issue, #321:
URL: https://github.com/apache/maven-compiler-plugin/issues/321
### Affected version
3.5.9
### Bug description
the java module system supports the ability to compile and execute "patch
modules" these are patches to existing modules that override pre-existing
content with replacements.
in order to compile (patch) classes for inclusion as a "patch module" the
`javac` compiler supports a cmdline option: `--patch-module
<module-name>=<path-to-module-source-root>`
invoking `javac` directly with the `--patch-module...` option specified
works as intended, however when attempting to use the maven plugin compiler
with:
`<compilerArgs>
<arg>--patch-module</arg>
<arg>java.base=${project.basedir}/...</arg>
</compilerArgs>`
specifying the same '<path-to-module-source-root>' as with the invocation of
`javac` the plugin fails to compile the patch classes.
the failures reported suggest that the compiler is failing to resolve
dependencies expressed in the sources of the patch classes against the target
module being patched...
e.g:
I have a module that contains a number of classes and packages, and I wish
to patch an existing class therein
so I create a "patch" class in tne maven project.
such a class may of course refer to other classes that already exist in the
module to be patch, but those dependencies are not patched themselves.
the patched class compilation will fail (when compiled by the plugin) with
errors naming any references to
dependencies in the target module as non-existent
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