FULL PRODUCT VERSION :
java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)

A DESCRIPTION OF THE PROBLEM :
From time to time, calling setTime on a GregorianCalendar instance crashes for no apparent reason.

Calendar cal = new GregorianCalendar();
Date d = new Date();

cal.clear();
cal.set(year, month - 1, day);
d.setTime(cal.getTimeInMillis());
[...]

cal.setTime(d);


REGRESSION.  Last worked in version 7u76


ERROR MESSAGES/STACK TRACES THAT OCCUR :

Caused by: java.lang.ArrayIndexOutOfBoundsException: 16
	at sun.util.calendar.BaseCalendar.getCalendarDateFromFixedDate(BaseCalendar.java:453)
	at java.util.GregorianCalendar.computeFields(GregorianCalendar.java:2397)
	at java.util.GregorianCalendar.computeFields(GregorianCalendar.java:2312)
	at java.util.Calendar.setTimeInMillis(Calendar.java:1804)
	at java.util.Calendar.setTime(Calendar.java:1770)


REPRODUCIBILITY :
This bug can be reproduced occasionally.