diff -r 000000000000 -r 6474c204b198 nsprpub/pr/tests/freeif.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nsprpub/pr/tests/freeif.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * A test to see if the macros PR_DELETE and PR_FREEIF are
+ * properly defined.  (See Bugzilla bug #39110.)
+ */
+
+#include "nspr.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static void Noop(void) { }
+
+static void Fail(void)
+{
+    printf("FAIL\n");
+    exit(1);
+}
+
+int main(int argc, char **argv)
+{
+    int foo = 1;
+    char *ptr = NULL;
+
+    /* this fails to compile with the old definition of PR_DELETE */
+    if (foo)
+        PR_DELETE(ptr);
+    else
+        Noop();
+
+    /* this nests incorrectly with the old definition of PR_FREEIF */
+    if (foo)
+        PR_FREEIF(ptr);
+    else
+        Fail();
+
+    printf("PASS\n");
+    return 0;
+}