PERLVARI(Iencoding, SV*, Nullsv) /* character encoding */
+PERLVAR(Idebug_pad, struct perl_debug_pad) /* always needed because of the re extension */
+
/* New variables must be added to the very end for binary compatibility.
* XSUB.h provides wrapper functions via perlapi.h that make this
* irrelevant, but not all code may be expected to #include XSUB.h. */