Wrong cast in stubs generated

$ #unzip
$ cd mre/src
$ groovy -version
Groovy Version: 3.0.8 JVM: 15.0.1 Vendor: Oracle Corporation OS: Mac OS X
$ groovyc -j JavaBase.java GroovyInheritor.groovy JavaUsage.java
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Compile error during compilation with javac.
/var/folders/t7/26sb5vb111n3ljbmwv4s340m0000gn/T/groovy-generated--java-source12536140884342736527/GroovyInheritor.java:14: error: incompatible types: Object cannot be converted to Integer
super((java.lang.Object)null);
      ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error


1 error