Re: garbage collector infloop in 21.4.9 and 21.5beta4 on MacOS 10.2

Skip> When I use VM to visit one specific mailbox the garbage collector Skip> gets into an infinite loop. I can visit, edit and save many other Skip> mailboxes. Only this one mailbox exhibits this problem (so far). Stephen> I don't see an infloop, just a very deep recursion. It's at Stephen> least theoretically possible possible that it would go that Stephen> deep because of the way GC's mark algorithm is implemented. Stephen> Do you ever get a crash? How big is your stack? Yes, it crashes with an illegal instruction error. In gdb it fails with Program received signal EXC_BAD_ACCESS, Could not access memory. 0x00008f1c in mark_vector (obj=17165376) at alloc.c:1047 My stack size is 512KB. Looking back at my Linux machine I see the stack size there is 8192KB. Boosting to 8192KB on the Powerbook seems to have gotten rid of the problem. Hopefully it won't return. Thanks, Skip