STRLEN sublen; /* saved sublen field from rex */
STRLEN suboffset; /* saved suboffset field from rex */
STRLEN subcoffset; /* saved subcoffset field from rex */
+ SV *sv; /* $_ during (?{}) */
MAGIC *pos_magic; /* pos() magic attached to $_ */
SSize_t pos; /* the original value of pos() in pos_magic */
U8 pos_flags; /* flags to be restored; currently only MGf_BYTES*/
int resume_state; /* where to jump to on return */
char *locinput; /* where to backtrack in string on failure */
char *loceol;
+ U8 *sr0; /* position of start of script run, or NULL */
union {