Issue #20184 has been reported by aalin (Andreas Alin). ---------------------------------------- Bug #20184: Ruby segfaults on Fly.io with 256 MB RAM https://bugs.ruby-lang.org/issues/20184 * Author: aalin (Andreas Alin) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- I've been running a Ruby 3.2 app on Fly.io with 256 MB RAM and it has been working fine. When I upgraded to Ruby 3.3.0, any Ruby script would crash immediately with a segfault. I haven't been able to reproduce it outside of fly.io. I created a repository with a basic rack app which crashes on fly.io. The readme includes the full output and a GDB backtrace. https://github.com/aalin/ruby-3-3-0-fly-crash -- https://bugs.ruby-lang.org/