Issue #19589 has been updated by byroot (Jean Boussier). I have a fix for it: https://github.com/ruby/ruby/pull/7686 The flag operation in `hash_iter_lev_dec` was incorrect and could corrupt the object. I think the bug is older than shapes introduction, but before it would corrupt unused memory. I still need to double check it doesn't have any other adverse effect on older rubies. ---------------------------------------- Bug #19589: Expecting system stack error but crashing https://bugs.ruby-lang.org/issues/19589#change-102725 * Author: alpaca-tc (Hiroyuki Ishii) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0dev (2023-04-11T00:54:20Z master 65e276096f) [arm64-darwin22] * Backport: 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED ---------------------------------------- The following code expects stack overflow but crashes. The version it occurs in is newer than 3.2.0. ``` def expect_system_stack_error(h) h.each_key {} h.each_value { expect_system_stack_error(h) } end expect_system_stack_error(a: nil) ``` -- https://bugs.ruby-lang.org/