=================================================================
==22541==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000008 (pc 0x0000007acc45 bp 0x7f4258aa47c0 sp 0x7f4258aa47b0 T98)
==22541==The signal is caused by a READ memory access.
==22541==Hint: address points to the zero page.
    #0 0x7acc44 in __wt_timestamp_iszero /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/txn.i:80:18
    #1 0x7a4c8c in __wt_txn_update_needs_timestamp /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/txn.i:273:28
    #2 0x7a338d in __wt_txn_commit /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/txn/txn.c:857:9
    #3 0x723918 in __session_commit_transaction /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/session/session_api.c:1669:9
    #4 0x52ab05 in commit_transaction /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/../../../test/format/ops.c:577:3
    #5 0x528cd6 in ops /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/../../../test/format/ops.c:1091:4
    #6 0x7f4273959dc4 in start_thread /usr/src/debug/glibc-2.17-c758a686/nptl/pthread_create.c:308
    #7 0x7f4272b4076c in __clone (/lib64/libc.so.6+0xf776c)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/include/txn.i:80:18 in __wt_timestamp_iszero
Thread T98 created by T0 here:
    #0 0x437521 in pthread_create /home/bostic/src/llvm40/projects/compiler-rt/lib/asan/asan_interceptors.cc:305
    #1 0x65e1b0 in __wt_thread_create /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/../src/os_posix/os_thread.c:30:2
    #2 0x522f10 in wts_ops /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/../../../test/format/ops.c:162:3
    #3 0x53bd9c in main /mnt/data0/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/../../../test/format/t.c:209:5
    #4 0x7f4272a6ab34 in __libc_start_main /usr/src/debug/glibc-2.17-c758a686/csu/../csu/libc-start.c:274

==22541==ABORTING
+ cleanup
+ status=1
+ '[' -f RUNDIR/CONFIG ']'
+ cat RUNDIR/CONFIG
############################################
#  RUN PARAMETERS
############################################
abort=0
alter=0
auto_throttle=1
backups=1
bitcnt=2
bloom=1
bloom_bit_count=58
bloom_hash_count=31
bloom_oldest=0
cache=26
cache_minimum=20
checkpoints=on
checkpoint_log_size=190
checkpoint_wait=69
checksum=uncompressed
chunk_size=8
compaction=0
compression=snappy
data_extend=0
data_source=table
delete_pct=24
dictionary=0
direct_io=0
encryption=rotn-7
evict_max=5
file_type=row-store
firstfit=0
huffman_key=0
huffman_value=0
independent_thread_rng=1
in_memory=0
insert_pct=10
internal_key_truncation=1
internal_page_max=9
isolation=snapshot
key_gap=0
key_max=50
key_min=27
leaf_page_max=11
leak_memory=0
logging=1
logging_archive=0
logging_compression=snappy
logging_file_max=298650
logging_prealloc=0
long_running_txn=0
lsm_worker_threads=3
merge_max=15
mmap=1
modify_pct=54
ops=100000
prefix_compression=1
prefix_compression_min=1
quiet=1
read_pct=7
rebalance=1
repeat_data_pct=43
reverse=0
rows=100000
runs=1
salvage=1
split_pct=97
statistics=0
statistics_server=0
threads=26
timer=360
transaction_timestamps=1
transaction-frequency=23
truncate=1
value_max=1327
value_min=9
verify=1
wiredtiger_config=
write_pct=5
############################################