RFR JDK-8244961: MethodHandles::privateLookupIn throws NPE when called during initPhase2

[Alan Bateman]

On 14/05/2020 21:12, Mandy Chung wrote:
> MethodHandles::privateLookupIn should prepare for being called during 
> early startup when the module of java.base classes are not yet 
> assigned.  This bug is uncovered by panama prototype converting NIO to 
> use memory access API.
>
> The fix is very simple and move the call to Module::isNamed only if 
> the caller module and target module are different:
> http://cr.openjdk.java.net/~mchung/jdk15/webrevs/8244961/webrev.00/
I think this is a bug I left in JDK 9, sorry about that. In general 
there should be very little code executed before the loaded classes are 
patched to in java.base. The exception is with exploded where a lot of 
library code gets executed when find the (exploded) module modules. The 
change looks good.

-Alan