When packaging modular projects with jpackage, module names can't start with "app."

[3298636952]

When using jpackage to package a modular project, after importing this module, the module name cannot start with app.

Here's a minimal example: https://github.com/beryx-gist/jnativehook-modular-demo

This example works perfectly. However, when you change the application's module name to start with app., the packaged result with jpackage fails to run.

build.gradle:

application {
    mainModule = "org.jnativehook.demo"  // Change to "app.jnativehook.demo"
    ...
}

jpackage {
    imageOptions += ["--win-console"]  // To see the error messages
    ...
}

module-info.java

module org.jnativehook.demo { 	//  Change to "app.jnativehook.demo"

    // When using this module, surprisingly the application module name cannot start with 'app.' or 'bpp.', but it can start with 'cpp.' or 'dpp.'?
    // Otherwise, an error will occur when running the packaged result with jpackage:
    //      Error: A JNI error has occurred, please check your installation and try again.
    //              Exception in thread "main" java.lang.InternalError: Module app.jnativehook.demo not in boot Layer.
    //              at java.base/sun.launcher.LauncherHelper.loadModuleMainClass(Unknown Source)
    //              at java.base/sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
    requires com.github.kwhat.jnativehook;
    opens org.jnativehook.example;
}