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Looks like the check-mk source package embeds a copy of nagios' downtime.h (along with other header files), and that Nagios has updated a struct since then. Patching Nagios doesn't make sense here, from a distribution perspective. The real fix is to fix check-mk's packaging to use a build dependency on some kind of nagios-dev package which provides the required headers. So this is a bug in check-mk, not in nagios. This is probably relevant to Debian's check-mk packaging, too. Checking in Debian and reporting there if this bug applies to Debian would be appropriate. ** Package changed: nagios3 (Ubuntu) => check-mk (Ubuntu) ** Tags added: needs-upstream-report -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1372284 Title: nagios3: SIGSEGV everyday at midnight To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/check-mk/+bug/1372284/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs