Type Error: illegal access for final methods on ReferencePipeline (stream) in Java 11 #6072
Description
There appears to be a unit test in JRuby 9.2 that passes with OpenJDK11, but when I try to use a java Stream from Jruby I get Illegal Access errors on the final methods?
I see similar errors in specs for a large application which I have been trying to upgrade from jdk10.2 & Jruby 9.1.17.0 where we use java streams extensively.
I have tried most of the example code in CallingJavaFromRuby and things appear to be working properly otherwise.
Environment Information
$ uname -a
Darwin me.fios-router.home 19.3.0 Darwin Kernel Version 19.3.0: Thu Jan 9 20:58:23 PST 2020; root:xnu-6153.81.5~1/RELEASE_X86_64 x86_64
$ java --version
openjdk 11.0.6 2020-01-14
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.6+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.6+10, mixed mode)
java installed from brew
$ jruby --version
jruby 9.2.9.0 (2.5.7) 2019-10-30 458ad3e OpenJDK 64-Bit Server VM 11.0.6+10 on 11.0.6+10 +jit [darwin-x86_64]
Jruby installed from rbenv (1.1.2)
I have no flags or ruby options set. Nothing installed except bundler (not used here)
Expected Behavior
I expect the code shown in the JRuby unit tests to work.
Actual Behavior
$ irb
irb(main):001:0> require 'java'
=> false
irb(main):002:0> (1..200).to_a.each.to_java.stream.limit(10)
Traceback (most recent call last):
6: from /usr/local/var/rbenv/versions/jruby-9.2.9.0/bin/irb:13:in `<main>'
5: from org/jruby/RubyKernel.java:1193:in `catch'
4: from org/jruby/RubyKernel.java:1193:in `catch'
3: from org/jruby/RubyKernel.java:1446:in `loop'
2: from org/jruby/RubyKernel.java:1052:in `eval'
1: from (irb):2:in `evaluate'
TypeError (illegal access on 'limit': class org.jruby.javasupport.JavaMethod (in module org.jruby.dist) cannot access a member of class java.util.stream.ReferencePipeline (in module java.base) with modifiers "public final")
When I run the same code from the unit test (condensed to one line) I get a TypeError due to Illegal Access for all the final methods in the ReferencePipeline.