msgrcv: properly downgrade the receive buffer

[perl5.git] / doio.c

diff --git a/doio.c b/doio.c
index aa6c35b..df6e62c 100644 (file)
--- a/doio.c
+++ b/doio.c
@@ -3141,6 +3141,7 @@ Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
     }
     if (ret >= 0) {
        SvCUR_set(mstr, sizeof(long)+ret);
+        SvPOK_only(mstr);
        *SvEND(mstr) = '\0';
        /* who knows who has been playing with this message? */
        SvTAINTED_on(mstr);