Recovery failure with an LSM tree

++ nice ./t

[1455330275:151376][77087:0x7fde14171700], t, file:wt-000014.lsm, txn-recover: wt-000014.lsm does not appear to be a WiredTiger file: WT_ERROR: non-specific WiredTiger error

[1455330275:151499][77087:0x7fde14171700], t, file:wt-000014.lsm, txn-recover: Operation failed during recovery: WT_ERROR: non-specific WiredTiger error

[1455330275:151598][77087:0x7fde14171700], t, file:wt-000014.lsm, txn-recover: Recovery failed: WT_ERROR: non-specific WiredTiger error

t: wiredtiger_open: RUNDIR/BACKUP: WT_ERROR: non-specific WiredTiger error

t: process 77087

############################################

#  RUN PARAMETERS

############################################

abort=0

auto_throttle=1

backups=1

bitcnt=3

bloom=1

bloom_bit_count=42

bloom_hash_count=27

bloom_oldest=0

cache=30

checkpoints=1

checksum=uncompressed

chunk_size=1

compaction=0

compression=lz4

data_extend=0

data_source=lsm

delete_pct=17

dictionary=1

direct_io=0

encryption=none

evict_max=5

file_type=row-store

firstfit=0

huffman_key=0

huffman_value=0

in_memory=0

insert_pct=61

internal_key_truncation=1

internal_page_max=13

isolation=read-uncommitted

key_gap=20

key_max=63

key_min=13

leaf_page_max=15

leak_memory=0

logging=1

logging_archive=0

logging_compression=zlib

logging_prealloc=0

long_running_txn=0

lsm_worker_threads=4

merge_max=5

mmap=1

ops=100000

prefix_compression=1

prefix_compression_min=7

quiet=1

repeat_data_pct=72

reverse=0

rows=100000

runs=1

rebalance=1

salvage=1

split_pct=65

statistics=1

statistics_server=1

threads=10

timer=20

value_max=324

value_min=19

verify=1

wiredtiger_config=

write_pct=73

############################################