From 754604c44e26572c47a2c15665bf1009e9e5b219 Mon Sep 17 00:00:00 2001
From: Nicholas Clark <nick@ccl4.org>
Date: Sat, 7 Feb 2004 21:46:59 +0000
Subject: [PATCH] deleting keys in restricted hashes was leaking the entry.
 Yow!

p4raw-id: //depot/perl@22281
---
 hv.c            |  1 +
 lib/Hash/Util.t | 35 ++++++++++++++++++++++++++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/hv.c b/hv.c
index 097b599..669e55a 100644
--- a/hv.c
+++ b/hv.c
@@ -1005,6 +1005,7 @@ S_hv_delete_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
 	 * an error.
 	 */
 	if (SvREADONLY(hv)) {
+	    SvREFCNT_dec(HeVAL(entry));
 	    HeVAL(entry) = &PL_sv_placeholder;
 	    /* We'll be saving this slot, so the number of allocated keys
 	     * doesn't go down, but the number placeholders goes up */
diff --git a/lib/Hash/Util.t b/lib/Hash/Util.t
index 1c77728..8ed557f 100644
--- a/lib/Hash/Util.t
+++ b/lib/Hash/Util.t
@@ -6,7 +6,7 @@ BEGIN {
         chdir 't';
     }
 }
-use Test::More tests => 159;
+use Test::More tests => 173;
 use strict;
 
 my @Exported_Funcs;
@@ -290,3 +290,36 @@ like( $@, qr/^Attempt to access disallowed key 'I_DONT_EXIST' in a restricted ha
 
 my $hash_seed = hash_seed();
 ok($hash_seed >= 0, "hash_seed $hash_seed");
+
+{
+    package Minder;
+    my $counter;
+    sub DESTROY {
+	--$counter;
+    }
+    sub new {
+	++$counter;
+	bless [], __PACKAGE__;
+    }
+    package main;
+
+    for my $state ('', 'locked') {
+	my $a = Minder->new();
+	is ($counter, 1, "There is 1 object $state");
+	my %hash;
+	$hash{a} = $a;
+	is ($counter, 1, "There is still 1 object $state");
+
+	lock_keys(%hash) if $state;
+
+	is ($counter, 1, "There is still 1 object $state");
+	undef $a;
+	is ($counter, 1, "Still 1 object $state");
+	delete $hash{a};
+	is ($counter, 0, "0 objects when hash key is deleted $state");
+	$hash{a} = undef;
+	is ($counter, 0, "Still 0 objects $state");
+	%hash = ();
+	is ($counter, 0, "0 objects after clear $state");
+    }
+}
-- 
2.7.4