Test case for cr7042126. Issue only found in OracleJDK, but test case is valid for OpenJDK as well Reviewed-by: mduigou
If the key to be inserted into a HashMap is null and the table needs to be resized as part of the insertion then addEntry will try to recalculate the hash of a null key. This will fail with an NPE. Reviewed-by: darcy
Reviewed-by: darcy, weijun
