AddressSanitizer in __wt_timestamp_iszero().

=================================================================

==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

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