For a JEP 493 enabled JDK linking in an JDK external module and limiting on that module results in a find exception on JDK dependency-modules:

$ jar -d -f hello.jar
com.other jar:file:////path/to/hello.jar!/module-info.class
exports com.other
requires java.base mandated
requires java.desktop
$ bin/jlink --add-modules com.other --module-path $(pwd):$(pwd)/jmods --limit-modules com.other --verbose --output testme-imagebin/jlink --add-modules com.other --module-path $(pwd) --limit-modules com.other --verbose
Error: Module java.desktop not found, required by com.other
java.lang.module.FindException: Module java.desktop not found, required by com.other
at java.base/java.lang.module.Resolver.findFail(Resolver.java:892)
at java.base/java.lang.module.Resolver.resolve(Resolver.java:192)
at java.base/java.lang.module.Resolver.resolve(Resolver.java:141)
at java.base/java.lang.module.Configuration.resolve(Configuration.java:413)
at java.base/java.lang.module.Configuration.resolve(Configuration.java:252)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.limitFinder(JlinkTask.java:786)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.newModuleFinder(JlinkTask.java:552)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.initJlinkConfig(JlinkTask.java:396)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.run(JlinkTask.java:289)
at jdk.jlink/jdk.tools.jlink.internal.Main.run(Main.java:50)
at jdk.jlink/jdk.tools.jlink.internal.Main.main(Main.java:34)

For a regular JDK build this works since the `jmods` directory can get added to the module path. For JEP 493 enabled JDKs this directory is not there. However, the dependencies should still be possible to be resolved from the run-time image.

Without --limit-modules this works fine:

$ bin/jlink --add-modules com.other --module-path $(pwd):$(pwd)/jmods --verbose --output testme-imagebin/jlink --add-modules com.other --module-path $(pwd) --limit-modules com.other --verbose
Linking based on the current run-time image
com.other file:///path/to/hello.jar
java.base jrt:/java.base (run-time image)
java.datatransfer jrt:/java.datatransfer (run-time image)
java.desktop jrt:/java.desktop (run-time image)
java.prefs jrt:/java.prefs (run-time image)
java.xml jrt:/java.xml (run-time image)

Providers:
  java.desktop provides java.net.ContentHandlerFactory used by java.base
  java.base provides java.nio.file.spi.FileSystemProvider used by java.base
  java.desktop provides javax.print.PrintServiceLookup used by java.desktop
  java.desktop provides javax.print.StreamPrintServiceFactory used by java.desktop
  java.desktop provides javax.sound.midi.spi.MidiDeviceProvider used by java.desktop
  java.desktop provides javax.sound.midi.spi.MidiFileReader used by java.desktop
  java.desktop provides javax.sound.midi.spi.MidiFileWriter used by java.desktop
  java.desktop provides javax.sound.midi.spi.SoundbankReader used by java.desktop
  java.desktop provides javax.sound.sampled.spi.AudioFileReader used by java.desktop
  java.desktop provides javax.sound.sampled.spi.AudioFileWriter used by java.desktop
  java.desktop provides javax.sound.sampled.spi.FormatConversionProvider used by java.desktop
  java.desktop provides javax.sound.sampled.spi.MixerProvider used by java.desktop
  java.desktop provides sun.datatransfer.DesktopDatatransferService used by java.datatransfer