page-delete update list traversed after it has been discarded.

ASAN:DEADLYSIGNAL

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

==18327==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0000104417c0 bp 0x3fff8756a8a0 sp 0x3fff8756a800 T15)

==18327==The signal is caused by a UNKNOWN memory access.

==18327==Hint: address points to the zero page.

    #0 0x104417bc in __wt_txn_commit /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/../src/txn/txn.c:860:9

    #1 0x103abdc4 in __session_commit_transaction /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/../src/session/session_api.c:1660:9

    #2 0x10160444 in commit_transaction /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/test/format/../../../test/format/ops.c:564:3

    #3 0x1015dc50 in ops /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/test/format/../../../test/format/ops.c:1070:4

    #4 0x1010ea9c in __asan::AsanThread::ThreadStart(unsigned long, __sanitizer::atomic_uintptr_t*) /home/dhows/llvm-git/projects/compiler-rt/lib/asan/asan_thread.cc:257

    #5 0x1003b278 in asan_thread_start(void*) /home/dhows/llvm-git/projects/compiler-rt/lib/asan/asan_interceptors.cc:305

    #6 0x3fff91d28940 in start_thread (/lib64/power8/libpthread.so.0+0x8940)

    #7 0x3fff91a7763c in __clone (/lib64/power8/libc.so.6+0x11763c)

AddressSanitizer can not provide additional info.

SUMMARY: AddressSanitizer: SEGV /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/../src/txn/txn.c:860:9 in __wt_txn_commit

Thread T15 created by T0 here:

    #0 0x1003b338 in pthread_create /home/dhows/llvm-git/projects/compiler-rt/lib/asan/asan_interceptors.cc:314

    #1 0x102cec3c in __wt_thread_create /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/../src/os_posix/os_thread.c:30:2

    #2 0x10157784 in wts_ops /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/test/format/../../../test/format/ops.c:162:3

    #3 0x10175d94 in main /home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer-ppc/build_posix/test/format/../../../test/format/t.c:209:5

    #4 0x3fff9198457c in generic_start_main.isra.0 (/lib64/power8/libc.so.6+0x2457c)

    #5 0x3fff91984770 in __libc_start_main (/lib64/power8/libc.so.6+0x24770)

==18327==ABORTING

+ cleanup

+ status=1

+ '[' -f RUNDIR/CONFIG ']'

+ cat RUNDIR/CONFIG

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

#  RUN PARAMETERS

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

abort=0

alter=0

auto_throttle=0

backups=1

bitcnt=8

bloom=1

bloom_bit_count=50

bloom_hash_count=8

bloom_oldest=1

cache=69

cache_minimum=0

checkpoints=on

checkpoint_log_size=48

checkpoint_wait=33

checksum=uncompressed

chunk_size=6

compaction=0

compression=zlib

data_extend=0

data_source=table

delete_pct=31

dictionary=0

direct_io=0

encryption=none

evict_max=1

file_type=row-store

firstfit=0

huffman_key=0

huffman_value=0

independent_thread_rng=1

in_memory=0

insert_pct=7

internal_key_truncation=1

internal_page_max=12

isolation=random

key_gap=12

key_max=85

key_min=20

leaf_page_max=9

leak_memory=0

logging=0

logging_archive=1

logging_compression=none

logging_file_max=151989

logging_prealloc=1

long_running_txn=0

lsm_worker_threads=3

merge_max=17

mmap=1

modify_pct=44

ops=100000

prefix_compression=1

prefix_compression_min=7

quiet=1

read_pct=6

rebalance=1

repeat_data_pct=21

reverse=0

rows=100000

runs=1

salvage=1

split_pct=97

statistics=0

statistics_server=0

threads=32

timer=360

transaction_timestamps=1

transaction-frequency=14

truncate=1

value_max=3611

value_min=9

verify=1

wiredtiger_config=

write_pct=12

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