JRuby 9.4.2.0 Released

The JRuby community is pleased to announce the release of JRuby 9.4.2.0.

JRuby 9.4.x targets Ruby 3.1 compatibility.

Thank you to our contributors this release, you help keep JRuby moving forward! @k77ch7, @andsel

Ruby Compatibility

  • __callee__ now properly returns the name under which a method was called, which will be the new name in the case of aliased methods. #2305, #7702
  • More use cases for keyword arguments have been fixed to behave correctly and avoid extraneous warnings. #7637, #7645, #7657, #7658, #7670, #7672, #7686
  • Array#pack now supports more cases, passing nearly all specs. #7663
  • Compatibility with CRuby’s command-line arguments has been improved. #7678, #7680, #7681, #7681, #7683, #7684

Standard Library

  • irb is updated to 1.4.2. #7690, #7691
  • open-uri is updated to 0.3.0. #7701
  • io-wait is updated to 0.3.0. #7701
  • stringio is updated to 3.0.5. #7701
  • strscan is updated to 3.0.6. #7701
  • open3 is switched to using the gem at 0.1.2. #7701

Platform Support

  • Exception backtraces now default to color output when the controlling terminal is a TTY. Disable using -Xbacktrace.color=false or equivalent in .jrubyrc. #7693

Performance

  • String#split has been optimized to skip regular expression use for simple split expressions. Simple ASCII strings also split faster. #7629

54 Github Issues resolved for 9.4.2.0

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