Issue #19853 has been updated by nagachika (Tomoyuki Chikanaga). Backport changed from 3.0: DONTNEED, 3.1: REQUIRED, 3.2: REQUIRED to 3.0: DONTNEED, 3.1: REQUIRED, 3.2: DONE ruby_3_2 9cd28caa7cc3b0d987db7c1231fe101fb3b27399 merged revision(s) 901b6d9c5025a30b3d7a5ed0a2c00baf9cfb061d. ---------------------------------------- Bug #19853: Segfault when calling `system` from a non-blocking fiber https://bugs.ruby-lang.org/issues/19853#change-104750 * Author: rmosolgo (Robert Mosolgo) * Status: Closed * Priority: Normal * Assignee: ioquatix (Samuel Williams) * ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-darwin22] * Backport: 3.0: DONTNEED, 3.1: REQUIRED, 3.2: DONE ---------------------------------------- Hi! I'm trying to improve my Ruby library to support transfer-based fibers (https://github.com/rmosolgo/graphql-ruby/pull/4322). To test parallel I/O, I'm using `system("sleep #{duration}")`, but this causes a segfault sometimes. I'd love to find a way to keep developing this feature but I'm not sure where to go next. I have attached a script which replicates the bug and I have attached the full segfault error dump. I encountered this error by running: ``` ruby fiber_bug.rb 2>out.txt ``` Does that help debug? Please let me know if I can provide anything else that'd be helpful. ---Files-------------------------------- out.txt (121 KB) fiber_bug.rb (624 Bytes) -- https://bugs.ruby-lang.org/