+SV *
+Perl_amagic_deref_call(pTHX_ SV *ref, int method) {
+ SV *tmpsv = NULL;
+
+ PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL;
+
+ while (SvAMAGIC(ref) &&
+ (tmpsv = amagic_call(ref, &PL_sv_undef, method,
+ AMGf_noright | AMGf_unary))) {
+ if (!SvROK(tmpsv))
+ Perl_croak(aTHX_ "Overloaded dereference did not return a reference");
+ if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) {
+ /* Bail out if it returns us the same reference. */
+ return tmpsv;
+ }
+ ref = tmpsv;
+ }
+ return tmpsv ? tmpsv : ref;
+}