Purify finding: jperl.t causes a few Array Bounds Reads

(one byte too far in a malloced buffer) at various spots
in regcomp.c, all the buffers malloced by SvGROW() in
sv_recode_to_utf8().

p4raw-id: //depot/perl@16608

diff --git a/sv.c b/sv.c
index 13b548bd5e16644fcba0fa18f5700d9396f6fb91..5992a69b2f400e88c37e8f829e5099fe64d595b6 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -10474,9 +10474,10 @@ Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
          PUTBACK;
          s = SvPV(uni, len);
          if (s != SvPVX(sv)) {
-              SvGROW(sv, len);
+              SvGROW(sv, len + 1);
               Move(s, SvPVX(sv), len, char);
               SvCUR_set(sv, len);
+              SvPVX(sv)[len] = 0;      
          }
          FREETMPS;
          LEAVE;