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                <<< ??