ORA-06512: at "SYS.DBMS_STATS", line 34634

BEGIN DBMS_STATS.GATHER_TABLE_STATS('SYS','X$KTFBUE'); END;

*
ERROR at line 1:
ORA-01476: divisor is equal to zero
ORA-06512: at "SYS.DBMS_STATS", line 34634
ORA-06512: at line 1

The solution is to the install patch for Bug 20783502.

As a workaround, you can avoid the issue by disabling Hybrid Histograms using:

 exec dbms_stats.set_global_prefs('ENABLE_HYBRID_HISTOGRAMS',0);

or

remove any REPEAT options in METHOD_OPT clause of DBMS_STATS.GATHER_TABLE_STATS. In other words change:

method_opt=>'for all columns size repeat'

back to the default:

method_opt=> 'for all columns size auto'

FOR 12C: exec DBMS_STATS.GATHER_TABLE_STATS('SYS','X$KTFBUE',method_opt=> 'for all columns size auto');