utf8.c: Stop _core_swash_init from leaking

If an %INC hook or $@ assignment dies, then a scalar is leaked.  I
don’t know that it is possible to test this.

diff --git a/utf8.c b/utf8.c
index 8dd60c9..fc9bfaf 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -2860,6 +2860,7 @@ Perl__core_swash_init(pTHX_ const char* pkg, const char* name, SV *listsv, I32 m
        if (!method) {  /* demand load utf8 */
            ENTER;
            errsv_save = newSVsv(ERRSV);
+           SAVEFREESV(errsv_save);
            /* It is assumed that callers of this routine are not passing in
             * any user derived data.  */
            /* Need to do this after save_re_context() as it will set
@@ -2872,7 +2873,6 @@ Perl__core_swash_init(pTHX_ const char* pkg, const char* name, SV *listsv, I32 m
                             NULL);
            if (!SvTRUE(ERRSV))
                sv_setsv(ERRSV, errsv_save);
-           SvREFCNT_dec(errsv_save);
            LEAVE;
        }
        SPAGAIN;
@@ -2885,6 +2885,7 @@ Perl__core_swash_init(pTHX_ const char* pkg, const char* name, SV *listsv, I32 m
        mPUSHi(none);
        PUTBACK;
        errsv_save = newSVsv(ERRSV);
+       SAVEFREESV(errsv_save);
        /* If we already have a pointer to the method, no need to use
         * call_method() to repeat the lookup.  */
        if (method ? call_sv(MUTABLE_SV(method), G_SCALAR)
@@ -2895,7 +2896,6 @@ Perl__core_swash_init(pTHX_ const char* pkg, const char* name, SV *listsv, I32 m
        }
        if (!SvTRUE(ERRSV))
            sv_setsv(ERRSV, errsv_save);
-       SvREFCNT_dec(errsv_save);
        LEAVE;
        POPSTACK;
        if (IN_PERL_COMPILETIME) {