#0  0x00007ffff3baf69b in raise () from /lib64/libc.so.6
#1  0x00007ffff3bb14a0 in abort () from /lib64/libc.so.6
#2  0x00007ffff173ffeb in mdb_assert_fail (env=0x7fffd8000930,
    expr_txt=expr_txt@entry=0x7ffff1742ac9 "rc == 0",
    func=func@entry=0x7ffff1743458 <__func__.6274> "mdb_page_dirty", line=line@entry=2386,
    file=0x7ffff1742c98 "../src/lmdb/libraries/liblmdb/mdb.c")
    at ../src/lmdb/libraries/liblmdb/mdb.c:1758
#3  0x00007ffff16ef150 in mdb_page_dirty (txn=txn@entry=0x7fffd81084c0, mp=<optimized out>)
    at ../src/lmdb/libraries/liblmdb/mdb.c:2386
#4  0x00007ffff16f2e0b in mdb_page_dirty (mp=<optimized out>, txn=0x7fffd81084c0)
    at ../src/lmdb/libraries/liblmdb/mdb.c:1998
#5  mdb_page_alloc (num=num@entry=1, mp=mp@entry=0x7ffff14b5518, mc=<optimized out>)
    at ../src/lmdb/libraries/liblmdb/mdb.c:2590
#6  0x00007ffff16f3029 in mdb_page_touch (mc=mc@entry=0x7fffc812c8c0)
    at ../src/lmdb/libraries/liblmdb/mdb.c:2709
#7  0x00007ffff16f428c in mdb_cursor_touch (mc=mc@entry=0x7fffc812c8c0)
    at ../src/lmdb/libraries/liblmdb/mdb.c:7328
#8  0x00007ffff16fba20 in mdb_cursor_del (mc=0x7fffc812c8c0, flags=flags@entry=0)
    at ../src/lmdb/libraries/liblmdb/mdb.c:7885