Fwd: JDK-17 jpackage: error when using --add-launcher with --runtime-image

[Serban Iordache]

Hi,

When using --add-launcher together with --runtime-image, jpackager exits
with the error message:
java.lang.ClassCastException: class java.util.ImmutableCollections$List12
cannot be cast to class java.lang.String
(java.util.ImmutableCollections$List12 and java.lang.String are in module
java.base of loader 'bootstrap')


For example, the following command fails:
jpackage --dest pkg --name main --module example/example.Main
--runtime-image ./image --add-launcher secondary=./secondary.properties

However, it works when using --module-path instead of --runtime-image:
jpackage --dest pkg --name main --module example/example.Main --module-path
./mods --win-console --add-launcher secondary=./secondary.properties

A reproducer is available here:
https://github.com/SSCCE/jpackage-launcher-issue.

This error seems to occur only in JDK-17. JDK-16 is not affected by this
issue:
https://github.com/SSCCE/jpackage-launcher-issue/actions/runs/1933837183.

- Serban