WT_ASSERT(session,

      !F_ISSET(ref, WT_REF_FLAG_INTERNAL) || F_ISSET(session->dhandle, WT_DHANDLE_EXCLUSIVE) ||

        !__wt_gen_active(session, WT_GEN_SPLIT, ref->page->pg_intl_split_gen)); 

(gdb) bt

#0  0x00007fd87a0754f5 in raise () from /lib64/libc.so.6

#1  0x00007fd87a076cd5 in abort () from /lib64/libc.so.6

#2  0x00007fd870c4a756 in __wt_abort (session=session@entry=0x7fd8686c0348) at src/third_party/wiredtiger/src/os_common/os_abort.c:30

#3  0x00007fd870c2f3a3 in __wt_ref_out (session=0x7fd8686c0348, ref=0x7fd852354a28) at src/third_party/wiredtiger/src/btree/bt_discard.c:41

#4  0x00007fd870d4f822 in __wt_evict_file (session=session@entry=0x7fd8686c0348, syncop=syncop@entry=WT_SYNC_DISCARD) at src/third_party/wiredtiger/src/evict/evict_file.c:106

#5  0x00007fd870cf8bfb in __wt_conn_dhandle_close (session=session@entry=0x7fd8686c0348, final=final@entry=false, mark_dead=mark_dead@entry=false) at src/third_party/wiredtiger/src/conn/conn_dhandle.c:387

#6  0x00007fd870d0119d in __sweep_discard_trees (dead_handlesp=<optimized out>, session=<optimized out>) at src/third_party/wiredtiger/src/conn/conn_sweep.c:163

#7  __sweep_server (arg=0x7fd8686c0348) at src/third_party/wiredtiger/src/conn/conn_sweep.c:317

#8  0x00007fd87a662aa1 in start_thread () from /lib64/libpthread.so.0

#9  0x00007fd87a12bc4d in clone () from /lib64/libc.so.6

(gdb) f 3

#3  0x00007fd870c2f3a3 in __wt_ref_out (session=0x7fd8686c0348, ref=0x7fd852354a28) at src/third_party/wiredtiger/src/btree/bt_discard.c:41

41          WT_ASSERT(session,

(gdb) p ref->flags

$8 = 1 '\001'

(gdb) p session->dhandle->flags

$9 = 137

(gdb) p ref->page->u->intl->split_gen

$10 = 558