The spec for the java.time.chrono.JapaneseChronology.eraOf() asserts that DateTimeException is expected if eraValue is invalid.

https://docs.oracle.com/javase/8/docs/api/java/time/chrono/JapaneseChronology.html#eraOf-int-

but in the case of input value Integer.MAX_VALUE: JapaneseChronology.INSTANCE.eraOf(Integer.MAX_VALUE);

the method throws unexpected java.lang.ArrayIndexOutOfBoundsException:

java.lang.ArrayIndexOutOfBoundsException: -2147483648
at java.time.chrono.JapaneseEra.of(JapaneseEra.java:201)
at java.time.chrono.JapaneseChronology.eraOf(JapaneseChronology.java:377)
at java.time.chrono.JapaneseChronology.eraOf(JapaneseChronology.java:123)

Due to this issue the following test will fail after integration:

api/java_time/chrono/JapaneseChronology/index.html#eraOf