t: FAILED: rollback to stable copy ("cd /data/bostic/1/RUNDIR.2 > /dev/null && rm -rf ROLLBACK.copy && mkdir ROLLBACK.copy && cp WiredTiger* wt* ROLLBACK.copy/") fa
iled: Unknown error 256

    ############################################
    #  RUN PARAMETERS: V2
    ############################################
    assert.read_timestamp=0
    assert.write_timestamp=0
    backup=1
    backup.incremental=block
    backup.incr_granularity=16384
    btree.bitcnt=8
    btree.compression=lz4
    btree.dictionary=1
    btree.huffman_value=0
    btree.internal_key_truncation=1
    btree.internal_page_max=10
    btree.key_gap=4
    btree.key_max=86
    btree.key_min=29
    btree.leaf_page_max=9
    btree.memory_page_max=8
    btree.prefix_compression=1
    btree.prefix_compression_min=4
    btree.repeat_data_pct=53
    btree.reverse=0
    btree.split_pct=92
    btree.value_max=97
    btree.value_min=11
    cache=176
    cache.evict_max=2
    cache.minimum=20
    checkpoint=wiredtiger
    checkpoint.log_size=162
    checkpoint.wait=12
    disk.checksum=uncompressed
    disk.data_extend=0
    disk.direct_io=0
    disk.encryption=rotn-7
    disk.firstfit=0
    disk.mmap=1
    disk.mmap_all=0
    format.abort=0
    format.independent_thread_rng=0
    format.major_timeout=0
    import=0
    logging=1
    logging.archive=1
    logging.compression=none
    logging.file_max=228785
    logging.prealloc=0
    lsm.auto_throttle=1
    lsm.bloom=1
    lsm.bloom_bit_count=51
    lsm.bloom_hash_count=15
    lsm.bloom_oldest=0
    lsm.chunk_size=8
    lsm.merge_max=6
    lsm.worker_threads=4
    ops.alter=1
    ops.compaction=0
    ops.hs_cursor=1
    ops.pct.delete=10
    ops.pct.insert=10
    ops.pct.modify=31
    ops.pct.read=37
    ops.pct.write=12
    ops.prepare=0
    ops.random_cursor=0
    ops.salvage=0
    ops.truncate=1
    ops.verify=1
    quiet=1
    runs=1
    runs.in_memory=0
    runs.ops=0
    runs.rows=2600000
    runs.source=table
    runs.threads=10
    runs.timer=11
    runs.type=row-store
    runs.verify_failure_dump=0
    statistics=0
    statistics.server=0
    stress.aggressive_sweep=0
    stress.checkpoint=0
    stress.checkpoint_prepare=0
    stress.hs_checkpoint_delay=0
    stress.hs_search=0
    stress.hs_sweep=0
    stress.split_1=0
    stress.split_2=0
    stress.split_3=0
    stress.split_4=0
    stress.split_5=1
    stress.split_6=0
    stress.split_7=0
    stress.split_8=0
    transaction.implicit=0
    transaction.timestamps=1
    wiredtiger.config=
    wiredtiger.rwlock=1
    wiredtiger.leak_memory=0
    ############################################