Ruby Issue Tracking System

07/27/2026

01:14 PM Ruby Bug #22104: Segfault in PRISM while Bootsnap compiles aws-sdk client_api.rb

> Hopefully this fixes https://bugs.ruby-lang.org/issues/21848 too
Nope, it did not henrik (Henrik A)

01:11 PM Ruby Bug #21848: GC compaction freezes during code reload with 100% CPU in rb_vm_ci_free -> st_general_delete

Still reproducible on `ruby 4.0.6 (2026-07-14 revision 03b6d3f889) +PRISM [arm64-darwin25]`
(Homebrew, macOS Darwin 25.5.0). Rails 8.1.2 dev server, Puma 8.0.2.
Same symptom: during code reloading a thread pegs one core at 100% CPU a... henrik (Henrik A)

07/07/2026

09:54 AM Ruby Bug #22104: Segfault in PRISM while Bootsnap compiles aws-sdk client_api.rb

byroot (Jean Boussier) wrote in #note-18:
> It will mostly likely be in 4.0.6, which will most likely be released in July, but it can always happen that an urgent security release is needed and that 4.0.6 is released in advance without ... henrik (Henrik A)

01/24/2026

07:21 PM Ruby Bug #21848 (Feedback): GC compaction freezes during code reload with 100% CPU in rb_vm_ci_free -> st_general_delete

Ruby 4.0.1 freezes with 100% CPU usage when garbage collection runs during Rails code reloading (hot reload in development). The process becomes unresponsive and requires kill -9 to terminate.
Envi... henrik (Henrik A)