reporter encountering issues when using javac and --module-source-path on a src path which contains symbolic links to src files outside of the src dir.

more info from submitter:
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To confirm that this is not a transaction or java flag usage issue, I tried
with a Java project example

https://openjdk.java.net/projects/jigsaw/quick-start#multimodulecompile

$SRCHOME/jdk11/bin/javac -d mods --module-source-path src
src/com.greetings/com/greetings/Main.java
src/com.greetings/com/greetings/Main.java:1: error: not in a module on the
module source path
package com.greetings;
^
1 error

In this case src/com.greetings/com/greetings/Main.java is a symlink pointing
to Main.java located outside the mods folder. I also observed that if the
original file Main.java symlink points to is placed somewhere under the mods
then this issue doesn't occur.