As part of the work on JDK-8218998, it is observed that -linksource does not seem to be effective when modules are involved.

This is reported as broken links by the link checker, and by direct observation of the generated files:

$ find build/jtreg/work/jdk/javadoc/doclet/testMetadata/TestMetadata -name src-html
build/jtreg/work/jdk/javadoc/doclet/testMetadata/TestMetadata/out-PACKAGES-NO_FRAMES-SINGLE/src-html
build/jtreg/work/jdk/javadoc/doclet/testMetadata/TestMetadata/out-PACKAGES-FRAMES-SINGLE/src-html
build/jtreg/work/jdk/javadoc/doclet/testMetadata/TestMetadata/out-PACKAGES-FRAMES-SPLIT/src-html
build/jtreg/work/jdk/javadoc/doclet/testMetadata/TestMetadata/out-PACKAGES-NO_FRAMES-SPLIT/src-html


Note there are no entries with PACKAGES replaced by MODULES