test/format failure: lsm_merge.c, 45: j == nchunks

 124: lsm, row-store                                                          

file:wt-000084.lsm: ../src/lsm/lsm_merge.c, 45: j == nchunks              

file:wt-000084.lsm: aborting WiredTiger library

file:wt-000084.lsm: process ID 1146: waiting for debugger...

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

#  RUN PARAMETERS

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

# bitcnt not applicable to this run

cache=80

compression=raw

data_extend=0

data_source=lsm

delete_pct=19

dictionary=0

file_type=row-store

hot_backups=1

huffman_key=0

huffman_value=1

insert_pct=41

internal_key_truncation=0

internal_page_max=14

key_gap=14

key_max=83

key_min=25

leaf_page_max=15

ops=50000

prefix=1

repeat_data_pct=29

reverse=0

rows=1000

runs=0

split_pct=83

statistics=0

threads=1

value_max=3648

value_min=13

# wiredtiger_config not applicable to this run

write_pct=5

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

(gdb) thread apply all where 12

Thread 4 (Thread 0x7f9eeb162700 (LWP 1162)):

#0  0x000000378920b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 ()

   from /lib64/libpthread.so.0

WT-1  0x00007f9eebc136af in __wt_cond_wait (session=0x19dff70, cond=0x19e69c0, 

    usecs=100000) at ../src/os_posix/os_mtx.c:75

WT-2  0x00007f9eebbb0f3e in __wt_cache_evict_server (arg=0x19dff70)

    at ../src/btree/bt_evict.c:167

WT-3  0x0000003789207851 in start_thread () from /lib64/libpthread.so.0

WT-4  0x0000003788ae767d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f9ee9d60700 (LWP 1164)):

#0  0x0000003788ae0263 in select () from /lib64/libc.so.6

WT-1  0x00007f9eebc15099 in __wt_sleep (seconds=100, micro_seconds=0)

    at ../src/os_posix/os_sleep.c:22

WT-2  0x00007f9eebc2f51c in __wt_attach (session=0x19e07b0)

    at ../src/support/global.c:97

WT-3  0x00007f9eebc11aec in __wt_abort (session=0x19e07b0)

    at ../src/os_posix/os_abort.c:21

WT-4  0x00007f9eebc2efd6 in __wt_assert (session=0x19e07b0, error=0, 

    file_name=0x7f9eebc4033e "../src/lsm/lsm_merge.c", line_number=45, 

    fmt=0x7f9eebc4033b "%s") at ../src/support/err.c:408

WT-5  0x00007f9eebc0725c in __wt_lsm_merge_update_tree (session=0x19e07b0, 

    lsm_tree=0x1a105a0, start_chunk=5, nchunks=15, chunk=0x7f9edc0008c0)

    at ../src/lsm/lsm_merge.c:45

WT-6  0x00007f9eebc081ce in __wt_lsm_merge (session=0x19e07b0, 

    lsm_tree=0x1a105a0, id=0, aggressive=0) at ../src/lsm/lsm_merge.c:318

WT-7  0x00007f9eebc0cd8a in __wt_lsm_merge_worker (vargs=0x1a12fd0)

    at ../src/lsm/lsm_worker.c:90

WT-8  0x0000003789207851 in start_thread () from /lib64/libpthread.so.0

WT-9  0x0000003788ae767d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f9ee935f700 (LWP 1165)):

#0  0x000000378920a836 in pthread_rwlock_rdlock () from /lib64/libpthread.so.0

WT-1  0x00007f9eebc13aef in __wt_readlock (session=0x19e05a0, rwlock=0x1a10260)

    at ../src/os_posix/os_mtx.c:202

WT-2  0x00007f9eebc0cb82 in __lsm_copy_chunks (session=0x19e05a0, 

    lsm_tree=0x1a105a0, cookie=0x7f9ee935ee30, old_chunks=0)

    at ../src/lsm/lsm_worker.c:30

WT-3  0x00007f9eebc0d29e in __wt_lsm_checkpoint_worker (arg=0x1a105a0)

    at ../src/lsm/lsm_worker.c:241

WT-4  0x0000003789207851 in start_thread () from /lib64/libpthread.so.0

WT-5  0x0000003788ae767d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f9eeb96a720 (LWP 1146)):

#0  0x00000037892080ad in pthread_join () from /lib64/libpthread.so.0

WT-1  0x00007f9eebc15164 in __wt_thread_join (session=0x19dfd60, 

    tid=140320504678144) at ../src/os_posix/os_thread.c:35

WT-2  0x00007f9eebc0a368 in __lsm_tree_close (session=0x19dfd60, 

    lsm_tree=0x1a105a0) at ../src/lsm/lsm_tree.c:87

WT-3  0x00007f9eebc0a7a0 in __wt_lsm_tree_close_all (session=0x19dfd60)

    at ../src/lsm/lsm_tree.c:166

WT-4  0x00007f9eebbe9847 in __wt_connection_close (conn=0x19df010)

    at ../src/conn/conn_open.c:83

WT-5  0x00007f9eebbe2dd0 in __conn_close (wt_conn=0x19df010, config=0x0)

    at ../src/conn/conn_api.c:518

WT-6  0x00000000004051ee in main (argc=2, argv=0x7fff5050d9c0)

    at ../src/utilities/util_main.c:184

        /* Copy entries one at a time, so we can reuse gaps in the list. */

        for (i = j = 0; j < nchunks && i < lsm_tree->nold_chunks; i++) {

                if (lsm_tree->old_chunks[i] == NULL) {

                        lsm_tree->old_chunks[i] =

                            lsm_tree->chunk[start_chunk + j];

                        ++j;

                        --lsm_tree->old_avail;

                }

        }

        WT_ASSERT(session, j == nchunks);

(gdb) p j

$7 = 0

(gdb) p nchunks

$8 = 15

(gdb) p i

$9 = 13

(gdb) p lsm_tree->nold_chunks

$10 = 13

(gdb) p lsm_tree->old_avail

$11 = 4294967285                <<< ??