stress test failure: WT_CURSOR.prev out-of-order returns

[1451952138:804734][19893:0x7f4497fff700], t, file:wt.wt, WT_CURSOR.prev: WT_CURSOR.prev out-of-order returns: returned key 0000056500.13/opqrstuvwxyzabcde then key 0000100000.00/opqrst: Invalid argument

[1451952138:804733][19893:0x7f44a6b7e700], t, file:wt.wt, WT_CURSOR.prev: WT_CURSOR.prev out-of-order returns: returned key 0000056500.13/opqrstuvwxyzabcde then key 0000100000.00/opqrst: Invalid argument

t: cursor.reset: WT_PANIC: WiredTiger library panic[1451952138:804790][19893:0x7f4497fff700], t, file:wt.wt, WT_CURSOR.prev: the process must exit and restart: WT_PANIC: WiredTiger library panic

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#  RUN PARAMETERS

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

abort=0

auto_throttle=1

backups=0

bitcnt=3

bloom=1

bloom_bit_count=6

bloom_hash_count=12

bloom_oldest=0

cache=1250

checkpoints=0

checksum=uncompressed

chunk_size=10

compaction=0

compression=none

data_extend=0

data_source=table

delete_pct=36

dictionary=0

direct_io=0

encryption=none

evict_max=3

file_type=row-store

firstfit=0

huffman_key=0

huffman_value=0

in_memory=1

insert_pct=36

internal_key_truncation=1

internal_page_max=13

isolation=snapshot

key_gap=18

key_max=51

key_min=12

leaf_page_max=9

leak_memory=0

logging=0

logging_archive=0

logging_compression=zlib

logging_prealloc=0

long_running_txn=0

lsm_worker_threads=3

merge_max=14

mmap=1

ops=100000

prefix_compression=0

prefix_compression_min=8

repeat_data_pct=11

reverse=0

rows=100000

runs=100

salvage=0

split_pct=51

statistics=0

statistics_server=0

threads=5

timer=20

value_max=128

value_min=20

verify=0

wiredtiger_config=

write_pct=68

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