#define PL_nthreads (*Perl_Inthreads_ptr(aTHXo))
#undef PL_nthreads_cond
#define PL_nthreads_cond (*Perl_Inthreads_cond_ptr(aTHXo))
+#undef PL_nullstash
+#define PL_nullstash (*Perl_Inullstash_ptr(aTHXo))
#undef PL_numeric_local
#define PL_numeric_local (*Perl_Inumeric_local_ptr(aTHXo))
#undef PL_numeric_name