+ while (1) {
+ /* This is the one we're going to try to empty. First time round
+ it's the original array. (Hopefully there will only be 1 time
+ round) */
+ HE ** const array = HvARRAY(hv);
+ I32 i = HvMAX(hv);
+
+ /* Because we have taken xhv_name out, the only allocated pointer
+ in the aux structure that might exist is the backreference array.
+ */
+
+ if (SvOOK(hv)) {
+ HE *entry;
+ struct xpvhv_aux *iter = HvAUX(hv);
+ /* If there are weak references to this HV, we need to avoid
+ freeing them up here. In particular we need to keep the AV
+ visible as what we're deleting might well have weak references
+ back to this HV, so the for loop below may well trigger
+ the removal of backreferences from this array. */
+
+ if (iter->xhv_backreferences) {
+ /* So donate them to regular backref magic to keep them safe.
+ The sv_magic will increase the reference count of the AV,
+ so we need to drop it first. */
+ SvREFCNT_dec(iter->xhv_backreferences);
+ if (AvFILLp(iter->xhv_backreferences) == -1) {
+ /* Turns out that the array is empty. Just free it. */
+ SvREFCNT_dec(iter->xhv_backreferences);
+
+ } else {
+ sv_magic((SV*)hv, (SV*)iter->xhv_backreferences,
+ PERL_MAGIC_backref, NULL, 0);
+ }
+ iter->xhv_backreferences = NULL;
+ }
+
+ entry = iter->xhv_eiter; /* HvEITER(hv) */
+ if (entry && HvLAZYDEL(hv)) { /* was deleted earlier? */
+ HvLAZYDEL_off(hv);
+ hv_free_ent(hv, entry);
+ }
+ iter->xhv_riter = -1; /* HvRITER(hv) = -1 */
+ iter->xhv_eiter = NULL; /* HvEITER(hv) = NULL */
+
+ /* There are now no allocated pointers in the aux structure. */
+
+ SvFLAGS(hv) &= ~SVf_OOK; /* Goodbye, aux structure. */
+ /* What aux structure? */