Increment refcount on @_ when passed through to another sub,
so it's not freed twiceon return.
} \
if (cx->blk_sub.cv) { \
if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) { \
+ if (cx->blk_sub.hasargs) { \
+ SvREFCNT_inc((SV*)cx->blk_sub.argarray); \
+ } \
SvREFCNT_dec((SV*)cx->blk_sub.cv); \
} \
}