on-page zero-length row-store values can be discarded from checkpoints

t: FAILED: WT_CURSOR.prev returned {0000057583.00/opqrstuvwxyzabcdefghi} then {0000057581.00/opqrstuvwx}

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

#  RUN PARAMETERS

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

abort=0

alter=0

auto_throttle=1

backups=0

bitcnt=6

bloom=1

bloom_bit_count=49

bloom_hash_count=29

bloom_oldest=0

cache=63

cache_minimum=20

checkpoints=on

checkpoint_log_size=184

checkpoint_wait=37

checksum=uncompressed

chunk_size=7

compaction=0

compression=none

data_extend=0

data_source=file

delete_pct=0

dictionary=0

direct_io=0

encryption=none

evict_max=0

file_type=row-store

firstfit=0

huffman_key=0

huffman_value=0

independent_thread_rng=1

in_memory=0

insert_pct=0

internal_key_truncation=0

internal_page_max=16

isolation=read-committed

key_gap=10

key_max=116

key_min=21

leaf_page_max=16

leak_memory=0

logging=1

logging_archive=1

logging_compression=none

logging_file_max=203453

logging_prealloc=0

long_running_txn=0

lsm_worker_threads=3

merge_max=13

mmap=1

modify_pct=42

ops=100000

prefix_compression=1

prefix_compression_min=2

quiet=1

read_pct=45

rebalance=1

repeat_data_pct=46

reverse=0

rows=100000

runs=100

salvage=1

split_pct=80

statistics=1

statistics_server=0

threads=4

timer=360

timing_stress_checkpoint=1

timing_stress_split_1=0

timing_stress_split_2=0

timing_stress_split_3=0

timing_stress_split_4=0

timing_stress_split_5=0

timing_stress_split_6=1

timing_stress_split_7=0

transaction_timestamps=1

transaction-frequency=88

truncate=1

value_max=3582

value_min=15

verify=1

wiredtiger_config=

write_pct=13

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