$ ./t -k 100000 -W 10 t: process 54528 1: 10 workers, 3 tables ... Finished verifying a checkpoint with 3 tables and 29114 keys t, file:__wt0000.wt, session.checkpoint: ../src/btree/rec_write.c, 3128: state == WT_CHILD_MODIFIED t, file:__wt0000.wt, session.checkpoint: aborting WiredTiger library