t: process 24157 running
format run more than 15 minutes past the maximum time
format run dumping cache and transaction state, then aborting the process

(gdb) where
#0  0x00007ff2677dee57 in sched_yield () at ../sysdeps/unix/syscall-template.S:78
#1  0x00005654a5705562 in __wt_yield () at src/os_posix/os_yield.c:25
#2  0x00005654a565fdf3 in read_op (cursor=0x7ff24cb779a0, op=NEXT, exactp=0x0) at format.i:45
#3  0x00005654a56636cd in nextprev (tinfo=0x5654a7ef1000, cursor=0x7ff24cb779a0, next=true)
    at ops.c:1185
#4  0x00005654a5662c42 in ops (arg=0x5654a7ef1000) at ops.c:943
#5  0x00007ff267ad36db in start_thread (arg=0x7ff25ffff700) at pthread_create.c:463
#6  0x00007ff2677fc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) frame 2
#2  0x00005654a565fdf3 in read_op (cursor=0x7ff24cb779a0, op=NEXT, exactp=0x0) at format.i:45
45	            __wt_yield();
(gdb) l
40	     * repeat reads that succeeded before, they should be repeatable.)
41	     */
42	    switch (op) {
43	    case NEXT:
44	        while ((ret = cursor->next(cursor)) == WT_PREPARE_CONFLICT)
45	            __wt_yield();
46	        break;
47	    case PREV:
48	        while ((ret = cursor->prev(cursor)) == WT_PREPARE_CONFLICT)
49	            __wt_yield();
(gdb) p ret
$1 = -31808