Issue #22261 has been updated by nobu (Nobuyoshi Nakada). Does [GH-18495](https://github.com/ruby/ruby/pull/18495) fix it? ---------------------------------------- Bug #22261: ruby-head builds have been failing on aarch64-linux CI in ruby/ruby-dev-builder https://bugs.ruby-lang.org/issues/22261#change-118653 * Author: tikkss (Tsutomu Katsube) * Status: Open * Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN ---------------------------------------- The daily "CRuby Dev Builds" workflow in ruby/ruby-dev-builder has failed every day since 2026-08-07: * https://github.com/ruby/ruby-dev-builder/actions/workflows/build.yml Because of this, `ruby-version: head` currently installs a snapshot from 2026-08-05: * https://github.com/ruby/ruby-dev-builder/releases Only the `build (ubuntu-26.04-arm, head)` job fails, during `make test-all TESTS="-j4"`. All other platforms build and test successfully, but since one matrix job fails, the "Publish Release" step is skipped and no new release is published. This looks like a ruby master issue on aarch64-linux rather than a issue in ruby-dev-builder. For what it is worth, it does not seem to reproduce on the rubyci.org Ubuntu 26.04 aarch64 machines, which have been green for the same period: * https://logs.rubyci.org/ubuntu-arm/ruby-master/recent.html The most frequent failure (2026-08-13, 08-16, 08-22, 08-23, 08-24) is a crash in `TestEnumerator#test_lazy_chain_under_gc_compact_stress`: ``` test/ruby/test_enumerator.rb:869: [BUG] try to mark T_NONE object (obj: out-of-heap:0x0000e8d1b901d640, parent: 0x0000e8d1b937ff80 T_IMEMO/<fields> (embed) len:2 capa:20x0000e8d1d3eb0040 proc_entry/Object ) ruby 4.1.0dev (2026-08-24T18:44:40Z :detached: c4fdf07d44) +PRISM [aarch64-linux] ``` Full crash dumps are in the logs: * https://github.com/ruby/ruby-dev-builder/actions/runs/32767004006/job/975587... (2026-08-24, c4fdf07d44) * job-logsc4fdf07d44.txt * https://github.com/ruby/ruby-dev-builder/actions/runs/32592837360/job/970792... (2026-08-22, 774cc95fd4) * job-logs774cc95fd4.txt On other days (2026-08-07, 08-08, 08-21), `TestObjectSpace#test_finalizer_with_super` failed instead: the child process exits successfully but prints garbage bytes (e.g. `"\xC5w<"`) instead of `:ok`: * https://github.com/ruby/ruby-dev-builder/actions/runs/31211225131/job/929743... (2026-08-07, 3156d5adb4) * job-logs3156d5adb4.txt ---Files-------------------------------- job-logsc4fdf07d44.txt (276 KB) job-logs774cc95fd4.txt (340 KB) job-logs3156d5adb4.txt (281 KB) -- https://bugs.ruby-lang.org/