(retracted by #13533)

Subject: [PATCH perl@11099]Re: [ID 20010704.003] Taint mode breaks global match
Message-ID: <15171.27355.895094.128142@ix.netsoft.ro>

p4raw-id: //depot/perl@11156

3 files changed, 31 insertions, 9 deletions

diff --git a/op.c b/op.c
index 2e6a13d02e..44c473954d 100644
--- a/op.c
+++ b/op.c
@@ -2035,9 +2035,15 @@ Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
 	right->op_type == OP_SUBST ||
 	right->op_type == OP_TRANS)) {
 	right->op_flags |= OPf_STACKED;
-	if (right->op_type != OP_MATCH &&
-            ! (right->op_type == OP_TRANS &&
-               right->op_private & OPpTRANS_IDENTICAL))
+	if ((right->op_type != OP_MATCH &&
+	     ! (right->op_type == OP_TRANS &&
+		right->op_private & OPpTRANS_IDENTICAL)) ||
+	    /* if SV has magic, then match on original SV, not on its copy.
+	       see note in pp_helem() */
+	    (right->op_type == OP_MATCH &&	
+	     (left->op_type == OP_AELEM ||
+	      left->op_type == OP_HELEM ||
+	      left->op_type == OP_AELEMFAST)))
 	    left = mod(left, right->op_type);
 	if (right->op_type == OP_TRANS)
 	    o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
diff --git a/sv.c b/sv.c
index d14810cc33..a7e1bda293 100644
--- a/sv.c
+++ b/sv.c
@@ -4415,9 +4415,9 @@ Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 nam
     mg->mg_moremagic = SvMAGIC(sv);
     SvMAGIC(sv) = mg;
 
-    /* Some magic sontains a reference loop, where the sv and object refer to
-       each other.  To prevent a avoid a reference loop that would prevent such
-       objects being freed, we look for such loops and if we find one we avoid
+    /* Some magic contains a reference loop, where the sv and object refer to
+       each other.  To avoid a reference loop that would prevent such objects
+       being freed, we look for such loops and if we find one we avoid
        incrementing the object refcount. */
     if (!obj || obj == sv ||
 	how == PERL_MAGIC_arylen ||
diff --git a/t/op/pos.t b/t/op/pos.t
index f3bc23c84a..7c4c1c567d 100755
--- a/t/op/pos.t
+++ b/t/op/pos.t
@@ -1,6 +1,6 @@
 #!./perl
 
-print "1..4\n";
+print "1..7\n";
 
 $x='banana';
 $x=~/.a/g;
@@ -19,5 +19,21 @@ $x = "test string?"; $x =~ s/\w/pos($x)/eg;
 print "not " unless $x eq "0123 5678910?";
 print "ok 4\n";
 
-
-
+# bug ID 20010704.003
+use Tie::Scalar;
+tie $y[0], Tie::StdScalar or die $!;
+$y[0] = "aaa";
+$y[0] =~ /./g;
+if (pos($y[0]) == 1) {print "ok 5\n"} else {print "not ok 5\n"}
+
+$x = 0;
+$y[0] = "aaa";
+$y[$x] =~ /./g;
+if (pos($y[$x]) == 1) {print "ok 6\n"} else {print "not ok 6\n"}
+untie $y[0];
+
+tie $y{'abc'}, Tie::StdScalar or die $!;
+$y{'abc'} = "aaa";
+$y{'abc'} =~ /./g;
+if (pos($y{'abc'}) == 1) {print "ok 7\n"} else {print "not ok 7\n"}
+untie $y{'abc'};