(F) The entry point function of threads->create() failed for some reason.
+=item Tied variable freed while still in use
+
+(F) An access method for a tied variable (e.g. FETCH) did something to
+free the variable. Since continuing the current operation is likely
+to result in a coredump, Perl is bailing out instead.
+
=item 5.005 threads are deprecated
(D deprecated) The 5.005-style threads (activated by C<use Thread;>)