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diff --git a/unittest/mysys/my_malloc-t.c b/unittest/mysys/my_malloc-t.c
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+/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#include <my_global.h>
+#include <my_sys.h>
+#include "tap.h"
+
+int main(int argc __attribute__((unused)),char *argv[])
+{
+ void *p;
+ MY_INIT(argv[0]);
+
+ plan(4);
+
+ p= my_malloc(PSI_NOT_INSTRUMENTED, 0, MYF(0));
+ ok(p != NULL, "Zero-sized block allocation.");
+
+ p= my_realloc(PSI_NOT_INSTRUMENTED, p, 32, MYF(0));
+ ok(p != NULL, "Reallocated zero-sized block.");
+
+ p= my_realloc(PSI_NOT_INSTRUMENTED, p, 16, MYF(0));
+ ok(p != NULL, "Trimmed block.");
+
+ my_free(p);
+ p= NULL;
+
+ ok((my_free(p), 1), "Free NULL pointer.");
+
+ my_end(0);
+ return exit_status();
+}
+