TruffleRuby - GraalVM Community Edition 19.2.0

Ruby is an experimental language in the GraalVM 19.2.0 release. More information is available on the GraalVM website. Changes in 19.2.0 (from the project changelog):

New features:

• Fiddle has been implemented.

Bug fixes:

• Set RbConfig::CONFIG['ruby_version'] to the same value as the TruffleRuby version. This fixes reusing C extensions between different versions of TruffleRuby with Bundler (#1715).
• Fixed Symbol#match returning MatchData (#1706).
• Allow Time#strftime to be called with binary format strings.
• Do not modify the argument passed to IO#write when the encoding does not match (#1714).
• Use the class where the method was defined to check if an UnboundMethod can be used for #define_method (#1710).
• Fixed setting $~ for Enumerable and Enumerator::Lazy's #grep and #grep_v.
• Improved errors when interacting with single-threaded languages (#1709).

Compatibility:

• Added Kernel#then (#1703).
• FFI::Struct#[]= is now supported for inline character arrays.
• blocking: true is now supported for FFI::Library#attach_function.
• Implemented Proc#>> and #<< (#1688).
• Thread.report_on_exception is now true by default like MRI 2.5+.
• BigDecimal compatibility has been generally improved in several ways.

Changes:

• An interop read message sent to a Proc will no longer call the Proc.

Performance:

• Several String methods have been made faster by the usage of vector instructions
  when searching for a single-byte character in a String.
• Methods needing the caller frame are now better optimized.

The general GraalVM 19.2.0 release notes are available on the graalvm.org website.