4.0.7

Ruby 4.0.7 portable binaries

Released by Ruby: 2026-09-15

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What's Changed

• Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO - Ruby - Ruby Issue Tracking System
• Bug #22210: Check if issue #19969 is still reproducible / re-opened in 4.0.x - Ruby - Ruby Issue Tracking System
• Bug #22217: Segmentation fault when resuming execution with Coverage.start and ruby/debug - Ruby - Ruby Issue Tracking System
• Fix formatting in ObjectSpace._id2ref error path by eregon · Pull Request #18206
• Bug #22200: ObjectSpace._id2ref can return a different object than the id's owner on Ruby 4.0 (stale id2ref_tbl entry for objects with generic fields) - Ruby - Ruby Issue Tracking System
• Bug #22123: Ruby::Box + BUNDLER_SETUP can evaluate gemspecs before main-box RubyGems initialization - Ruby - Ruby Issue Tracking System
• Bump ERB to 6.0.7 by k0kubun · Pull Request #18282
• Bug #22237: GC.auto_compact corrupts a String or segfaults from String#tr with dup or gsub - Ruby - Ruby Issue Tracking System
• Bug #22243: Change fork behavior when Process._fork raises an exception during fork with a block argument - Ruby - Ruby Issue Tracking System
• Bug #22223: Socket.tcp with connect_timeout returns a phantom "connected" socket for a refused connection on macOS 27 (kernel answers EISCONN on connect retry; SO_ERROR never consulted) - Ruby - Ruby Issue Tracking System
• Bug #22220: Performance regression when requiring aws-sdk-ec2 in Ruby 4.0.6 - Ruby - Ruby Issue Tracking System
• Bug #22218: Line TracePoint misses executed loop condition after a guard - Ruby - Ruby Issue Tracking System
• Bug #22198: win32: heap overflow in Kernel#system - Ruby - Ruby Issue Tracking System
• Bug #22196: Heap-use-after-free in fiber_switch with transfer-terminated async tasks on 3.4.10 - Ruby - Ruby Issue Tracking System
• Bug #22190: Class#subclasses does not include clones of classes that include modules - Ruby - Ruby Issue Tracking System
• Bug #11438: native_thread_init_stack() get machine.stack_start unequal to thread's stack start address, x86 win32 - Ruby - Ruby Issue Tracking System
• Bug #22257: Prepending a module to an already-included module leaves stale super caches - Ruby - Ruby Issue Tracking System
• Bug #22242: SEGV in method dispatch (vm_call_iseq_setup_kwparm_nokwarg / def_iseq_ptr) on Ruby 4.0.6 — Rails CI - Ruby - Ruby Issue Tracking System
• Bug #22269: Coverage.line_stub clobbers already-collected coverage data - Ruby - Ruby Issue Tracking System
• Bug #22290: Adding instance variables to anonymous object may bloat all future classes - Ruby - Ruby Issue Tracking System
• Bug #22292: YJIT/ZJIT: Struct accessor crashes after an instance variable is set on a Struct that exactly fills the largest GC slot - Ruby - Ruby Issue Tracking System
• Bug #20958: fix ENV.keys encoding on windows - Ruby - Ruby Issue Tracking System
• Bug #22259: Arrays sharding a buffer segfault when concatenating with each other - Ruby - Ruby Issue Tracking System
• Bug #22264: Warning missing from parse.y hash literals - Ruby - Ruby Issue Tracking System
• Bug #22303: EncodingError from interpolating symbol crashes whole process - Ruby - Ruby Issue Tracking System
• Bug #22224: YJIT: rb_yjit_invalidate_ep_is_bp takes the VM lock stopping Ractors on every Proc materialization; multi-Ractor throughput collapses (up to ~150x) - Ruby - Ruby Issue Tracking System

Note: This list is automatically generated by tool/gen-github-release.rb. Because of this, some commits may be missing.

Full Changelog

ruby/ruby@v4.0.6...v4.0.7

Build revision: 4.0.7-3
Build fingerprint: v1-53eb959ee8d2a815554b98af1ace4b24ab1044147b89ea62363c7f0c8c82e5d8