[aarch64-port-dev ] jdk8: random null pointer exceptions from javac

[Andrew Haley]

On 11/04/2015 05:18 PM, Edward Nevill wrote:

> For some time I have been observing random, infrequent null pointer
> exceptions in javac. These were not repeatable but seemed to happen
> about once every 10 builds of OpenJDK.
> 
> I think I have found the cause. Backing out the the following
> changeset causes the problem to go away.

I'd love to see something more concrete.  As far as I can tell you're
simply preventing the register allocator from putting a narrow OOP in
FP.  But why only narrow OOPs?  DO you have any grounds for believing
this is correct?  And what about JDK9?

Andrew.