RFR (S) CR 7177472: JSR292: MethodType interning penalizes scalability

Aleksey Shipilev aleksey.shipilev at oracle.com
Thu Jun 13 19:09:28 UTC 2013

On 06/13/2013 09:51 PM, Christian Thalinger wrote:
> While preparing the push I noticed the new code gives a warning:
> src/share/classes/java/lang/invoke/MethodType.java:1106: warning: [unchecked] unchecked cast
>                 T that = ((WeakEntry<T>) obj).get();
>                                          ^
>   required: WeakEntry<T>
>   found:    Object
>   where T is a type-variable:
>     T extends Object declared in class WeakEntry
> 1 warning
> Could you fix that, please?

Can't reproduce that warning in my builds (are you having
-Xlint:unchecked enabled in the new build system somehow?), but good
catch! There is the preceding instanceof check that ought to make this
cast safe now. Also we don't need to declare locals as T in equals().

Please try this:

This seems a trivial change, so I only tested java/lang/invoke
regression tests afterwards, those are OK.


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