I think this PR #313 cause regression.
I clone master repository so it will contains this PR and then build it and when I run it I got error below:
juni@Nala dist % java -jar jython.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org.python.google.common.collect.MapMaker
at org.python.core.ThreadStateMapping.(ThreadStateMapping.java:31)
at org.python.core.Py.(Py.java:1789)
at org.python.core.PySystemState.(PySystemState.java:80)
at org.python.util.jython.main(jython.java:593)
Caused by: java.lang.ClassNotFoundException: org.python.google.common.collect.MapMaker
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:827)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:1095)
... 4 more