PERL_BITFIELD32 sv_debug_inpad:1; /* was allocated in a pad for an OP */
PERL_BITFIELD32 sv_debug_cloned:1; /* was cloned for an ithread */
PERL_BITFIELD32 sv_debug_line:16; /* the line where we were allocated */
+ U32 sv_debug_serial; /* serial number of sv allocation */
char * sv_debug_file; /* the file where we were allocated */
#endif
};