Verify org.jruby.jcodings:jcodings:1.0.44 is JDK11 compatible

Question

Verify org.jruby.jcodings:jcodings:1.0.44 is JDK11 compatible

Closed this issue 5 years ago · 6 comments

Hello guys,

we are in the process of migrating from JDK8 to JDK11. Our internal tool says that org.jruby.jcodings:jcodings:1.0.44 is not not JDK11 compatible, because it uses covariant methods:

This project contains references to covariant Java API methods that are not provided in JDK 8.

Incompatible bytecode compiled with JDK 9+ may throw a java.lang.NoSuchMethodError when running on JDK 8. An example are implementations of java.nio.Buffer.

Ensure that bytecode compiled to run on JDK 8 uses the -release 8 option. Bytecode built using compiler options -source 1.8 and -target 1.8 do not ensure compatible bytecode.

NoSuchMethodError exceptions may also be mitigated by up casting types such as: ((Buffer) charBuffer).flip()

Could you please verify/release a new version that is JDK11 compatible?

Answer 1 · 2019-05-30T18:19:26.000Z

@lopex @headius please ^

Answer 2 · 2019-05-30T18:28:36.000Z

Does maven-release-plugin have an option for -release 8 ?

Answer 3 · 2019-10-01T17:51:26.000Z

@lopex yes
https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

there's also a way how to fix it without setting compatibility flags, see https://github.com/headius/backport9

Answer 4 · 2019-10-02T01:07:00.000Z

I actually fixed this for my GraalVM experiments. Pushing release now. Sorry for delay!

Answer 5 · 2019-10-02T01:43:27.000Z

BTW, what tool is that?

Answer 6 · 2019-10-02T02:14:29.000Z

Release 1.0.45 should be out there now!