==13521== 16 bytes in 2 blocks are definitely lost in loss record 11 of 646
==13521==    at 0x259A8A: calloc (in /usr/local/lib/valgrind/vgpreload_memcheck-amd64-freebsd.so)
==13521==    by 0x2DDA249: __wt_calloc (os_alloc.c:38)
==13521==    by 0x2DDA6CC: __wt_strndup (os_alloc.c:178)
==13521==    by 0x2DB515B: __rec_split_write (rec_write.c:1247)
==13521==    by 0x2DB4D5F: __rec_split_finish (rec_write.c:1115)
==13521==    by 0x2DB9A44: __rec_row_leaf (rec_write.c:3137)
==13521==    by 0x2DB3AB2: __wt_rec_write (rec_write.c:453)
==13521==    by 0x2D9D154: __evict_file_request (bt_evict.c:551)
==13521==    by 0x2D9CF63: __evict_file_request_walk (bt_evict.c:515)
==13521==    by 0x2D9CA13: __evict_worker (bt_evict.c:344)
==13521==    by 0x2D9C7AE: __wt_cache_evict_server (bt_evict.c:288)
==13521==    by 0x10B24F0: ??? (in /lib/libthr.so.3)

import wiredtiger, wttest
from helper import key_populate, value_populate

class test_f(wttest.WiredTigerTestCase):
    def test_f(self):
        self.session.create(
            'file:x', 'key_format=S,value_format=S')
        cursor = self.session.open_cursor('file:x', None)
        for i in range(1, 10):
            cursor.set_key(key_populate(cursor, i))
            cursor.set_value("======== VALUE =======")
            cursor.insert()
        cursor.close()
        self.session.checkpoint()


if __name__ == '__main__':
    wttest.run()