txn_release_snapshot assertion failure

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

#  RUN PARAMETERS

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

# bitcnt not applicable to this run

cache=3

compression=none

data_extend=0

data_source=table

delete_pct=2

dictionary=0

file_type=variable-length column-store

hot_backups=0

# huffman_key not applicable to this run

huffman_value=0

insert_pct=43

internal_key_truncation=0

internal_page_max=9

key_gap=11

# key_max not applicable to this run

# key_min not applicable to this run

leaf_page_max=12

ops=100000

# prefix not applicable to this run

repeat_data_pct=70

reverse=0

rows=100000

runs=100

split_pct=80

statistics=0

threads=8

value_max=2010

value_min=5

# wiredtiger_config not applicable to this run

write_pct=0

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

(gdb) bt

#0  0x00007f41dcea27b3 in select () from /lib64/libc.so.6

WT-1  0x0000000000419f39 in __wt_sleep (seconds=100, micro_seconds=0) at ../src/os_posix/os_sleep.c:22

WT-2  0x000000000042a31d in __wt_attach (session=0x6e3ae0) at ../src/support/global.c:97

WT-3  0x000000000047a822 in __wt_abort (session=0x6e3ae0) at ../src/os_posix/os_abort.c:21

WT-4  0x0000000000429d6d in __wt_assert (session=0x6e3ae0, error=0, file_name=0x4ad6e2 "../src/txn/txn.c", line_number=72, 

    fmt=0x4ad6df "%s") at ../src/support/err.c:408

WT-5  0x000000000042e250 in __wt_txn_release_snapshot (session=0x6e3ae0) at ../src/txn/txn.c:70

WT-6  0x0000000000491d52 in __wt_txn_read_last (session=0x6e3ae0) at ../src/include/txn.i:250

WT-7  0x0000000000491f57 in __cursor_leave (cbt=0x7f41c4055a20) at ../src/include/cursor.i:67

WT-8  0x0000000000492cbe in __wt_btcur_insert (cbt=0x7f41c4055a20) at ../src/btree/bt_cursor.c:332

WT-9  0x000000000046154b in __curfile_insert (cursor=0x7f41c4055a20) at ../src/cursor/cur_file.c:223

WT-10 0x000000000040734b in col_insert (cursor=0x7f41c4055a20, key=0x7f41da016e00, value=0x7f41da016de0, keynop=0x7f41da016dd8)

    at ../../../test/format/ops.c:915

WT-11 0x0000000000405e2e in ops (arg=0x6f0b30) at ../../../test/format/ops.c:343

WT-12 0x00007f41dd570c6b in start_thread () from /lib64/libpthread.so.0

WT-13 0x00007f41dcea95ed in clone () from /lib64/libc.so.6