Have any of you experienced similar crashes? I was trying to search for a similar issue but without success. The backtrace above is from Squid version 5.5. While I understand it is an older version, I believe the IPC code hasnâ??t changed much since then. Unfortunately, we don't have a reproducer or the possibility of upgrading Squid to a newer version on the running system for testing. It's also worth noting that after restarting Squid, which was stuck in the crash loop, Squid started normally. I suspect it could be caused by uninitialized SHM or something similar. What do you think? Would it help if I set some debug options and share the output with you? I was considering something like: debug_options ALL,1 1,9 54,9 Thanks in advance for your response. Regards, Lubos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx https://lists.squid-cache.org/listinfo/squid-users