Unable to call inherited instance method on Java class under OpenJDK 12

[fidothe]

Environment

JRuby 9.2.8.0, OpenJDK 12:

openjdk version "12.0.1" 2019-04-16
OpenJDK Runtime Environment (build 12.0.1+12)
OpenJDK 64-Bit Server VM (build 12.0.1+12, mixed mode, sharing)

uname -a: Darwin Kernel Version 18.7.0: Tue Aug 20 16:57:14 PDT 2019; root:xnu-4903.271.2~2/RELEASE_X86_64 x86_64

JRuby invoked via bundle exec / RSpec, JRUBY_OPTS empty:
bundle exec rspec spec

bundled gems:

$ bundle show
Gems included by the bundle:
  * addressable (2.4.0)
  * bundler (2.0.1)
  * crack (0.4.3)
  * diff-lcs (1.3)
  * docile (1.3.1)
  * hashdiff (0.3.8)
  * jar-dependencies (0.4.0)
  * json (2.2.0)
  * rake (12.3.2)
  * rspec (3.8.0)
  * rspec-core (3.8.0)
  * rspec-expectations (3.8.2)
  * rspec-mocks (3.8.0)
  * rspec-support (3.8.0)
  * safe_yaml (1.0.5)
  * saxon (0.2.2)
  * simplecov (0.16.1)
  * simplecov-html (0.10.2)
  * vcr (4.0.0)
  * webmock (2.3.2)
  * yard (0.9.18)

Expected Behavior

In the saxon-rb project, there should be no failing specs when running

bundle exec rspec spec/saxon/xslt/executable_spec.rb

https://github.com/fidothe/saxon-rb/blob/master/spec/saxon/xslt/executable_spec.rb

Actual Behaviour

Under JDK 1.8, there are no failures. Under OpenJDK 12 there are two, both NoMethodErrors resulting from calling an instance method of a Java class that is defined in a superclass.

The method is setInitialMode on an instance the class net.sf.saxon.s9api.Xslt30Transformer, from the Saxon 9.9.1.2 XML processing library. The method is defined on net.sf.saxon.s9api.AbstractXsltTransformer. The library can be downloaded from https://sourceforge.net/projects/saxon/files/Saxon-HE/9.9/

The error report is:

     NoMethodError:
       undefined method `setInitialMode' for #<Java::NetSfSaxonS9api::Xslt30Transformer:0x5d2e6f62>
       Did you mean?  set_initial_context_node

The Java packages are imported into a convenience module by the code in lib/saxon/loader.rb

[fidothe]

I put together a simplifed test case at https://github.com/fidothe/jrbug-5885, with a trivial JAR and a trivial ruby script that behaves the same locally. It's running with a ludicrous travis build matrix at the moment.

[fidothe]

I set up a travis build matrix (https://travis-ci.com/fidothe/jrbug-5885) that runs the examples against JRuby 9.2 and 9.1, and against OpenJDK 8 and 11. The failure happens for both 9.2 and 9.1 against OpenJDK 11, and they both succeed on OpenJDK 8.

[headius]

Confirmed with @fidothe that this is fixed on master (9.2.9).

[fidothe]

This reappeared in 9.2.10 and is still there in 9.2.11, and now occurs in OpenJDK 8 too. I'll open a new issue.