test/format sanitizer memory leak

==62513==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 88 byte(s) in 5 object(s) allocated from:

    #0 0x48e0c9 in calloc (/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/t+0x48e0c9)

    WT-1 0x687a98 in __wt_calloc /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/os_posix/os_alloc.c:39

    WT-2 0xa92818 in __wt_row_ikey_alloc /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/row_key.c:478

    WT-3 0xa941c2 in __wt_row_ikey /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/row_key.c:512

    WT-4 0xa0100d in __split_ref_deepen_move /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/bt_split.c:284

    WT-5 0x9fe346 in __split_deepen /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/bt_split.c:493

    WT-6 0x9f094f in __split_parent /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/bt_split.c:1034

    WT-7 0x9f4835 in __wt_split_multi /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/bt_split.c:1493

    WT-8 0x5cd7ba in __evict_page_dirty_update /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/evict/evict_page.c:215

    WT-9 0x5c79de in __wt_evict /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/evict/evict_page.c:109

    WT-10 0x5a6cba in __wt_evict_page /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/evict/evict_lru.c:660

    WT-11 0x5aa91f in __wt_evict_lru_page /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/evict/evict_lru.c:1372

    WT-12 0x5ad4a5 in __wt_cache_wait /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/evict/evict_lru.c:1431

    WT-13 0xd78ca2 in __wt_cache_full_check /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/cache.i:197

    WT-14 0xd79e4e in __cursor_enter /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/cursor.i:63:33

    WT-15 0xd79026 in __curfile_enter /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/cursor.i:96:32

    WT-16 0xd5a67e in __cursor_func_init /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/cursor.i:198:33

    WT-17 0xd57f4c in __wt_btcur_search /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/btree/bt_cursor.c:308:32

    WT-18 0xb5b5f3 in __curfile_search /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/cursor/cur_file.c:200

    WT-19 0x4bf992 in read_row /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/../../../test/format/ops.c:608

    WT-20 0x4bd360 in ops /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/../../../test/format/ops.c:482

    WT-21 0x3f17e07ee4 in start_thread (/lib64/libpthread.so.0+0x3f17e07ee4)

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

#  RUN PARAMETERS

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

abort=0

auto_throttle=1

firstfit=0

bitcnt=1

bloom=1

bloom_bit_count=22

bloom_hash_count=27

bloom_oldest=0

cache=1

checkpoints=1

checksum=uncompressed

chunk_size=8

compaction=0

compression=bzip

data_extend=0

data_source=file

delete_pct=27

dictionary=0

evict_max=5

file_type=row-store

backups=0

huffman_key=0

huffman_value=0

insert_pct=27

internal_key_truncation=1

internal_page_max=17

isolation=snapshot

key_gap=3

key_max=91

key_min=17

leak_memory=0

leaf_page_max=12

logging=0

logging_archive=0

logging_prealloc=1

logging=0

lsm_worker_threads=3

merge_max=20

mmap=1

ops=100000

prefix_compression=1

prefix_compression_min=8

repeat_data_pct=61

reverse=0

rows=100000

runs=1

split_pct=77

statistics=0

statistics_server=0

threads=4

timer=20

value_max=577

value_min=18

wiredtiger_config=

write_pct=10

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