Re: [PATCH] perlio.c repair

[p5sagit/p5-mst-13.2.git] / perlio.c

diff --git a/perlio.c b/perlio.c
index ed81598..ce20542 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -645,9 +645,13 @@ PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
        int i;
        list = PerlIO_list_alloc(aTHX);
        for (i=0; i < proto->cur; i++) {
-           SV *arg = NULL;
-           if (proto->array[i].arg)
-               arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
+           SV *arg = proto->array[i].arg;
+#ifdef sv_dup
+           if (arg && param)
+               arg = sv_dup(arg, param);
+#else
+           PERL_UNUSED_ARG(param);
+#endif
            PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
        }
     }
@@ -1015,10 +1019,13 @@ PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
                    PerlIO_funcs * const layer =
                        PerlIO_find_layer(aTHX_ s, llen, 1);
                    if (layer) {
+                       SV *arg = NULL;
+                       if (as)
+                           arg = newSVpvn(as, alen);
                        PerlIO_list_push(aTHX_ av, layer,
-                                        (as) ? newSVpvn(as,
-                                                        alen) :
-                                        &PL_sv_undef);
+                                        (arg) ? arg : &PL_sv_undef);
+                       if (arg)
+                           SvREFCNT_dec(arg);
                    }
                    else {
                        if (ckWARN(WARN_LAYER))
@@ -1493,12 +1500,7 @@ PerlIO_resolve_layers(pTHX_ const char *layers,
     if (layers && *layers) {
        PerlIO_list_t *av;
        if (incdef) {
-           IV i;
-           av = PerlIO_list_alloc(aTHX);
-           for (i = 0; i < def->cur; i++) {
-               PerlIO_list_push(aTHX_ av, def->array[i].funcs,
-                                def->array[i].arg);
-           }
+           av = PerlIO_clone_list(aTHX_ def, NULL);
        }
        else {
            av = def;
@@ -1543,10 +1545,13 @@ PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
            PerlIOl *l = *f;
            layera = PerlIO_list_alloc(aTHX);
            while (l) {
-               SV * const arg = (l->tab->Getarg)
-                       ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
-                       : &PL_sv_undef;
-               PerlIO_list_push(aTHX_ layera, l->tab, arg);
+               SV *arg = NULL;
+               if (l->tab->Getarg)
+                   arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
+               PerlIO_list_push(aTHX_ layera, l->tab,
+                                (arg) ? arg : &PL_sv_undef);
+               if (arg)
+                   SvREFCNT_dec(arg);
                l = *PerlIONext(&l);
            }
        }
@@ -2220,7 +2225,9 @@ PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
        return NULL;
 #ifdef sv_dup
     if (param) {
-       return sv_dup(arg, param);
+       arg = sv_dup(arg, param);
+       SvREFCNT_inc_simple_void_NN(arg);
+       return arg;
     }
     else {
        return newSVsv(arg);
@@ -2244,19 +2251,15 @@ PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
     }
     if (f) {
        PerlIO_funcs * const self = PerlIOBase(o)->tab;
-       SV *arg;
+       SV *arg = NULL;
        char buf[8];
        PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
                     self->name, (void*)f, (void*)o, (void*)param);
        if (self->Getarg)
            arg = (*self->Getarg)(aTHX_ o, param, flags);
-       else {
-           arg = NULL;
-       }
        f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
-       if (arg) {
+       if (arg)
            SvREFCNT_dec(arg);
-       }
     }
     return f;
 }