ADDITIONAL SYSTEM INFORMATION :
Tested with Java 11 - 23, everywhere the same.

A DESCRIPTION OF THE PROBLEM :
When trying to compile a `module-info.java` file that exports a package which only contains a `package-info.java` file or a resource file, compilation fails complaining about empty or missing package. In the `package-info.java` case this might be acceptable as the file only holds information about the package but itself does not mean anything is inside the package. But if there are resources in the package (supplied via `--patch-module`) the package should not be considered empty.

Currently you cannot (or I just didn't find a way) compile a `module-info.java` file without also having at least one Java source file that is either compiled along or supplied via `--patch-module`. This sometimes is necessary to build special "resources-only" JAR files which can then be consumed by a modular application.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Given these files:
```
$ find -type f -exec sh -c 'echo; echo {}; cat {}' \;

./res/pkg/res.txt
foo

./src/module-info.java
module mod {
    exports pkg;
}

./src/pkg/A.java
package pkg;

class A {
}

./src/pkg/package-info.java
package pkg;
```

This commando fails as expected with "src\module-info.java:2: error: package is empty or does not exist: pkg"
```
rm -rf bin* && javac -d bin src/module-info.java
```

These three work as exepcted:
```
rm -rf bin* && javac -d bin src/module-info.java src/pkg/A.java
rm -rf bin* && javac -d bin2 src/pkg/A.java && javac -d bin src/module-info.java --patch-module mod=bin2
rm -rf bin* && javac -d bin src/module-info.java --patch-module mod=src
```

These two fail with "src\module-info.java:2: error: package is empty or does not exist: pkg".
The first might be acceptable, but the second should work.
```
rm -rf bin* && javac -d bin src/module-info.java src/pkg/package-info.java
rm -rf bin* && javac -d bin src/module-info.java --patch-module mod=res
```


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
You can compile a `module-info.java` file for a resources-only module
ACTUAL -
src\module-info.java:2: error: package is empty or does not exist: pkg

CUSTOMER SUBMITTED WORKAROUND :
```
mkdir -p dummy/pkg
echo "package pkg;" >dummy/pkg/Dummy.java
rm -rf bin* && javac -d bin src/module-info.java --patch-module mod=dummy
```