column-store values were incorrectly encoded at write

[1535458785:802093][25249:0x3fff980bf150], t, file:wt, eviction-server: __verify_dsk_col_var, 613: data entries 24 and 25 on page at [write-check] are identical and should have been run-length encoded

[1535458785:802171][25249:0x3fff980bf150], t, eviction-server: __wt_evict_thread_run, 321: cache eviction thread error: WT_DATA_CORRUPTION: database corruption detected

t: process 25249

[1535458785:802185][25249:0x3fff980bf150], t, eviction-server: __wt_panic, 523: the process must exit and restart: WT_PANIC: WiredTiger library panic

[1535458785:802200][25249:0x3fff980bf150], t, eviction-server: __wt_abort, 30: aborting WiredTiger library