jdk/modules/incubator/ImageModules.java fails with NoClassDefFoundError in tier7:

Exception in thread "main" java.lang.NoClassDefFoundError: writer/MessageWriter
at test.WriteUpperCase.main(WriteUpperCase.java:36)
Caused by: java.lang.ClassNotFoundException: writer.MessageWriter
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 1 more

The failure is observed on solaris-sparev9 mostly.