there doesn't seem to be a nautilus-dbg package or similar which includes the debug symbols, unfortunately. here's a stacktrace from while it's waiting.
** Attachment added: "gdb-nautilus-2020-08-15.txt" https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1891712/+attachment/5401888/+files/gdb-nautilus-2020-08-15.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891712 Title: nautilus takes ages to start up when not already running To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1891712/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs