Issue #21204 has been updated by hsbt (Hiroshi SHIBATA). `TestSocket#test_timestamp` is failed sometimes on ModGC workflow. ``` 1) Failure: TestSocket#test_timestamp [/home/runner/work/ruby/ruby/src/test/socket/test_socket.rb:493]: <[[#<Socket:fd 7>], [], []]> expected but was <nil>. ``` https://github.com/ruby/ruby/actions/runs/14212913556/job/39823279828?pr=130... ---------------------------------------- Bug #21204: `TestEtc#test_ractor_parallel` is still flaky result with ModGC/MMTk https://bugs.ruby-lang.org/issues/21204#change-112535 * Author: hsbt (Hiroshi SHIBATA) * Status: Assigned * Assignee: eightbitraptor (Matt V-H) * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- https://github.com/ruby/ruby/actions/runs/14121185441/job/39561623937?pr=130... ``` 1) Failure: TestEtc#test_ractor_parallel [/home/runner/work/ruby/ruby/src/test/etc/test_etc.rb:178]: pid 150540 killed by SIGABRT (signal 6) (core dumped) | [BUG] pthread_mutex_lock: Owner died (EOWNERDEAD) | ruby 3.5.0dev (2025-03-28T03:13:46Z pull/13004/merge 4cfbc634ea) +PRISM +GC[mmtk] [x86_64-linux] | | -- Control frame information ----------------------------------------------- | | malloc_consolidate(): unaligned fastbin chunk detected | | -- Threading information --------------------------------------------------- | Total ractor count: 1 ``` -- https://bugs.ruby-lang.org/