Issue #20694 has been updated by mame (Yusuke Endoh). Can you share the full backtrace, not only "Control frame information" section but also "C level backtrace information" section? ---------------------------------------- Bug #20694: "try to mark T_NONE object" error for very large arrays https://bugs.ruby-lang.org/issues/20694#change-109503 * Author: ngan (Ngan Pham) * Status: Open * ruby -v: 3.3.4 * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- In CI, we've been occasionally seeing `[BUG] try to mark T_NONE object`. I don't have any way to reproduce it but I'm going to put some information here in case anyone has any ideas. One thing I've noticed is that it happens for very large arrays: ``` <OBJ_INFO:gc_mark_ptr@gc.c:7072> 0x00007f587d04fc90 [0 M ] T_NONE /usr/local/bundle/ruby/3.3.0/gems/simpleidn-0.2.2/lib/simpleidn/uts46mapping.rb: [BUG] try to mark T_NONE object ruby 3.3.4 (2024-07-09 revision be1089c8ec) [x86_64-linux] ``` https://github.com/mmriis/simpleidn/blob/master/lib/simpleidn/uts46mapping.r... and... ``` <OBJ_INFO:gc_mark_ptr@gc.c:7072> 0x00007f7ec426fdc8 [0 M ] T_NONE /usr/local/bundle/ruby/3.3.0/gems/domain_name-0.6.20240107/lib/domain_name/etld_data.rb: [BUG] try to mark T_NONE object ruby 3.3.1 (2024-04-23 revision c56cd86388) [x86_64-linux] ``` https://github.com/knu/ruby-domain_name/blob/master/lib/domain_name/etld_dat... ---Files-------------------------------- backtrace.txt (9.12 KB) -- https://bugs.ruby-lang.org/