Bug #19419
Updated by byroot (Jean Boussier) almost 2 years ago
Reported downstream at https://github.com/Shopify/bootsnap/issues/436
Relevant part of the crash report:
```
[BUG] try to mark T_NONE object
-- C level backtrace information -------------------------------------------
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_print_backtrace+0xd) [0x7fb6b050ab39] ruby-3.2.0/vm_dump.c:785
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_vm_bugreport) ruby-3.2.0/vm_dump.c:1080
Ruby/3.2.0/x64/lib/libruby.so.3.2(bug_report_end+0x0) [0x7fb6b0301049] ruby-3.2.0/error.c:790
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_bug_without_die) ruby-3.2.0/error.c:790
Ruby/3.2.0/x64/lib/libruby.so.3.2(die+0x0) [0x7fb6b025ae4f] ruby-3.2.0/error.c:798
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_bug) ruby-3.2.0/error.c:800
Ruby/3.2.0/x64/lib/libruby.so.3.2(gc_mark_ptr+0xcf) [0x7fb6b032a43f] ruby-3.2.0/gc.c:7059
Ruby/3.2.0/x64/lib/libruby.so.3.2(mark_key+0x2f) [0x7fb6b032a75f] ruby-3.2.0/gc.c:7085
Ruby/3.2.0/x64/lib/libruby.so.3.2(apply_functor+0x13) [0x7fb6b0466bc5] ruby-3.2.0/st.c:1574
Ruby/3.2.0/x64/lib/libruby.so.3.2(st_general_foreach) ruby-3.2.0/st.c:1484
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_st_foreach) ruby-3.2.0/st.c:1581
Ruby/3.2.0/x64/lib/libruby.so.3.2(ibf_dump_mark+0x1a) [0x7fb6b029895a] ruby-3.2.0/compile.c:13033
Ruby/3.2.0/x64/lib/libruby.so.3.2(gc_mark_stacked_objects+0x78) [0x7fb6b032d628] ruby-3.2.0/gc.c:7437
Ruby/3.2.0/x64/lib/libruby.so.3.2(gc_mark_stacked_objects_all) ruby-3.2.0/gc.c:7477
Ruby/3.2.0/x64/lib/libruby.so.3.2(gc_marks_rest) ruby-3.2.0/gc.c:8675
Ruby/3.2.0/x64/lib/libruby.so.3.2(gc_marks+0x423) [0x7fb6b032e643] ruby-3.2.0/gc.c:8716
Ruby/3.2.0/x64/lib/libruby.so.3.2(gc_start) ruby-3.2.0/gc.c:9547
Ruby/3.2.0/x64/lib/libruby.so.3.2(heap_prepare+0x2d) [0x7fb6b03319c8] ruby-3.2.0/gc.c:2431
Ruby/3.2.0/x64/lib/libruby.so.3.2(heap_next_free_page) ruby-3.2.0/gc.c:2672
Ruby/3.2.0/x64/lib/libruby.so.3.2(newobj_alloc) ruby-3.2.0/gc.c:2780
Ruby/3.2.0/x64/lib/libruby.so.3.2(newobj_of0+0x66) [0x7fb6b0332441] ruby-3.2.0/gc.c:2876
Ruby/3.2.0/x64/lib/libruby.so.3.2(newobj_of) ruby-3.2.0/gc.c:2896
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_wb_protected_newobj_of) ruby-3.2.0/gc.c:2918
Ruby/3.2.0/x64/lib/libruby.so.3.2(str_alloc_embed+0x10) [0x7fb6b046f9a8] ruby-3.2.0/string.c:890
Ruby/3.2.0/x64/lib/libruby.so.3.2(str_new0) ruby-3.2.0/string.c:926
Ruby/3.2.0/x64/lib/libruby.so.3.2(str_new_frozen_buffer+0x7d) [0x7fb6b04757ed] ruby-3.2.0/string.c:1461
Ruby/3.2.0/x64/lib/libruby.so.3.2(rb_file_directory_p+0xf4) [0x7fb6b03114d4] ruby-3.2.0/file.c:1309
```
Unfortunately like many GC bugs, we don't have a reproduction, the initial reporter isn't able to reproduce it reliably.