The JRuby community is pleased to announce the release of JRuby 10.0.5.0.

   - Homepage: https://www.jruby.org/
   - Download: https://www.jruby.org/download

JRuby 10.0.5.x targets Ruby 3.4 compatibility.

Thank you to our contributors this release, you help keep JRuby moving forward! @evaniainbrooks, @kares, @chadlwilson, #jimtng
Compatibility

   - Fixed: Two bugs in the JIT compiler that broke certain super calls and defined_method yields. (#8944, #8946, #9310, #9349)
   - Fixed: Fiber#raise left the fiber in an resumable state by not correctly transfering control. (#9297, #9356)
   - Fixed: Connecting a socket using nonblocking operations failed to complete the establishment of the connection. This affected Redis users, among other cases. (#9304, #9305)
   - Fixed: Process#detach raised a NullPointerException if called from a non-main thread. (#9314, #9311)

JVM Integration

   - Java 26 is officially supported. (#9332)

Platform Integration

   - New platform support: The native library backend for JRuby, JNR, has been updated to include support for the RISCv64 architecture.
   - Fixed on Windows: File#flock used unsupported native operations on Windows, causing it to raise errors. This affected the “logger” library, among other cases. (#9347, #9348)
   - Fixed on Windows: IO#popen failed to pass keyword arguments if also given a leading environment hash. (#9351, #9352)

Stability

   - Fixed: Several memory leaks that affected users running multiple JRuby instances in a single process. (#9070, #9092, #9187, #9359)

43 Issues and PRs resolved for 10.0.5.0

    #4213 squiggly heredoc strip space between interpolation and line connector by mistake
    #8944 Double unresolved super from aliased method when compiled with indy
    #8946 define_method conversion fails to yield after indy JIT
    #9070 Memory leak in jruby within openhab
    #9092 ThreadLocal Memory Leak in JRuby 10.0.2.0 with ScriptingContainer
    #9187 Memory leak running RubyGems in separate runtimes in a loop
    #9261 Fix Time subsecond precision loss from floating point arithmetic
    #9292 Reduce BigInteger construction
    #9293 Incorrect caller_locations line for multi-line call with unless
    #9297 Different behaviour than MRI on Fiber#raise
    #9302 review call-info reset
    #9304 Socket.tcp does not complete connection
    #9305 Ensure connectable sockets finish
    #9307 Time being returned as ASCII-8BIT encoding in JRuby 10
    #9310 [fix] define_method captured block propagation in JIT mode
    #9311 Push a frame for thread toplevel
    #9312 Construct xmlschema string as US-ASCII
    #9314 Process.detach raises ArrayIndexOutOfBoundsException if called from a thread that is not the main thread
    #9316 [10.0] build: bump maven from 3.9.11 to 3.9.14 via script-only style
    #9317 [10.0] build: improve build/maven consistency / bump github actions
    #9322 Fix prepended module initialize not called for Ruby classes rooted in a Java superclass
    #9323 [deps] bump jruby-openssl to latest
    #9324 NPE retrieving IO channel
    #9326 [fix] NullPointerException from closed IO
    #9330 Sync with prism update so we can compile jruby-prism using 10.0
    #9332 Support Java 26
    #9334 [fix] Exception#dup: copy cause to the duplicated exception
    #9335 [fix] MatchData#deconstruct_keys: include non-participating captures
    #9336 [fix] Bignum#eql?: use type-strict comparison (not ==)
    #9337 [fix] Bignum comparison with Float in <=> and ==
    #9338 [fix] Bignum: use correct site for coerced comparisons
    #9339 [fix] IO#reopen: copy encoding from source IO
    #9340 Hash#rehash corrupts insertion-order when deduplicating keys
    #9341 [fix] Hash#rehash: fix deduplicating keys (#9340)
    #9343 [compat] Thread#native_thread_id: using Java thread-id
    #9344 [fix] Digest::Base: synchronize MessageDigest mutation
    #9345 [fix] Encoding.compatible?: check when swapping args
    #9347 Use JDK for File#flock on Windows
    #9348 ruby/logger gem broken after version 1.6.3 using JRuby on Windows
    #9349 Disable AliasMethod direct binding for now
    #9352 Issue with calling IO.popen(env, cmd, opts) on Windows
    #9351 Fix non-native IO.popen env + kwargs handling
    #9354 Update JNR dependencies
    #9355 Propagate newline from if to bodies
    #9356 Properly complete Fiber#raise transfer
    #9359 Leak fixes redux
    #9364 [fix] TCPServer#initialize: close channel on bind/init failure