update-lsm assert failure

(gdb) bt

#0  0x00007fac797bc7b3 in select () from /lib64/libc.so.6

WT-1  0x0000000000416a01 in __wt_sleep (seconds=100, micro_seconds=0)

    at ../src/os_posix/os_sleep.c:22

WT-2  0x0000000000426e5d in __wt_attach (session=0xe1e0e0)

    at ../src/support/global.c:97

WT-3  0x0000000000477252 in __wt_abort (session=0xe1e0e0)

    at ../src/os_posix/os_abort.c:21

WT-4  0x00000000004268ad in __wt_assert (session=0xe1e0e0, error=0, 

    file_name=0x4a93a2 "../src/txn/txn.c", line_number=171, fmt=0x4a939f "%s")

    at ../src/support/err.c:408

WT-5  0x000000000042b011 in __wt_txn_refresh (session=0xe1e0e0, max_id=0, 

    get_snapshot=1) at ../src/txn/txn.c:171

WT-6  0x000000000048e75e in __wt_txn_read_first (session=0xe1e0e0)

    at ../src/include/txn.i:230

WT-7  0x000000000048ea76 in __cursor_enter (cbt=0x7fabbc7d1d20)

    at ../src/include/cursor.i:102

WT-8  0x000000000048eaed in __cursor_func_init (cbt=0x7fabbc7d1d20, reenter=1)

    at ../src/include/cursor.i:120

WT-9  0x000000000048f51e in __wt_btcur_insert (cbt=0x7fabbc7d1d20)

    at ../src/btree/bt_cursor.c:278

WT-10 0x000000000045de37 in __curfile_insert (cursor=0x7fabbc7d1d20)

    at ../src/cursor/cur_file.c:223

WT-11 0x00000000004718f8 in __clsm_put (session=0xe1e0e0, clsm=0x7fac00006980, 

    key=0x7fac00006a38, value=0x7fac00006a58, position=0)

    at ../src/lsm/lsm_cursor.c:1028

WT-12 0x0000000000471f64 in __clsm_insert (cursor=0x7fac00006980)

    at ../src/lsm/lsm_cursor.c:1119

WT-13 0x0000000000402d24 in worker (cfg=0x7fffba53eed0, worker_type=2)

    at ../../../bench/wtperf/wtperf.c:325

WT-14 0x00000000004029f4 in insert_thread (arg=0x7fffba53eed0)

    at ../../../bench/wtperf/wtperf.c:237

WT-15 0x00007fac79e8ac6b in start_thread () from /lib64/libpthread.so.0

WT-16 0x00007fac797c35ed in clone () from /lib64/libc.so.6

(gdb) frame 5

WT-5  0x000000000042b011 in __wt_txn_refresh (session=0xe1e0e0, max_id=0, 

    get_snapshot=1) at ../src/txn/txn.c:171

171			WT_ASSERT(session, TXNID_LE(prev_oldest_id, snap_min));

(gdb) p prev_oldest_id

$2 = 11803805

(gdb) p snap_min

$3 = 11803804