Ruby Issue Tracking System

08/04/2026

05:45 AM Ruby Bug #22217: Segmentation fault when resuming execution with `Coverage.start` and ruby/debug

Thank you so much for the quick fix and for preparing the backport! yokomaru (Yoko Suzuki)

07/30/2026

04:07 AM Ruby Bug #22217 (Closed): Segmentation fault when resuming execution with `Coverage.start` and ruby/debug

Resuming execution from `ruby/debug` while coverage collection is enabled via `Coverage.start` can cause a segmentation fault and crash the Ruby process.
The crash is intermittent, but reproduces frequently using the same steps. I con... yokomaru (Yoko Suzuki)

11/08/2025

07:57 AM Ruby Bug #21673: Segmentation Fault in IRB when refining `Kernel#puts` using `Module#refine` (Regression since Ruby 3.4)

I sincerely apologize, but I made an error in the entry regarding the second environment's information, so I have corrected it and re-uploaded the backtrace file.
The file has been updated to reflect the correct distribution name.
... yokomaru (Yoko Suzuki)

05:15 AM Ruby Bug #21673 (Closed): Segmentation Fault in IRB when refining `Kernel#puts` using `Module#refine` (Regression since Ruby 3.4)

In the IRB environment running Ruby 3.4 and later, the VM crashes with a Segmentation Fault when a module refining `Kernel#puts` is defined and `puts` is subsequently executed. The crash does not occur when the exact same code is execute... yokomaru (Yoko Suzuki)