execution fails with IncompatibleClassChangeError

[Brian Goetz]

Easier would be to do what we do for other kinds of method refs that 
can't cleanly be implemented as an MH (such as defender super calls), 
which is to desugar to a method (basically turn the MR back into its 
equivalent lambda.)

Since you asked... :)  The underlying problem comes from the 292 spec, 
which nest-mate accessibility for MHs is different from the rules in the 
source language.  292 could fix this too...hint...

On 12/18/2012 11:39 AM, Remi Forax wrote:
> On 12/18/2012 01:08 PM, Maurizio Cimadamore wrote:
>> Thanks for the report. We are aware of the issue and working on a fix.
>
> yes, the compiler needs to generate an accessor for it.
>
> Rémi
>
>>
>> Maurizio
>>
>> On 18/12/12 11:38, Anna Kozlova wrote:
>>> Hello,
>>>
>>>
>>>
>>> Running the following class
>>>
>>> {code}
>>>
>>> public class FooBar {
>>>
>>>        private static final class Bar {
>>>
>>>            private Bar() {
>>>
>>>            }
>>>
>>>        }
>>>
>>>
>>>
>>>        private interface I {
>>>
>>>            Bar create();
>>>
>>>        }
>>>
>>>
>>>
>>>        static void foo(I intf) {}
>>>
>>>
>>>
>>>        public static void main(String[] args) throws Exception {
>>>
>>>            foo(Bar::new);
>>>
>>>        }
>>>
>>> }
>>>
>>> {code}
>>>
>>>
>>>
>>> fails with
>>>
>>> Exception in thread "main" java.lang.IncompatibleClassChangeError
>>>
>>>                    at
>>> java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNa
>>> tives.java:383)
>>>
>>>                    at p.FooBar.main(FooBar.java:18)
>>>
>>>                    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
>>> Method)
>>>
>>>                    at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57
>>> )
>>>
>>>                    at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
>>> .java:43)
>>>
>>>                    at java.lang.reflect.Method.invoke(Method.java:474)
>>>
>>>                    at
>>> com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
>>>
>>> Caused by: java.lang.IllegalAccessException: member is private:
>>> p.FooBar$Bar.<init>()void/invokeSpecial, from p.FooBar
>>>
>>>                    at
>>> java.lang.invoke.MemberName.makeAccessException(MemberName.java:732)
>>>
>>>                    at
>>> java.lang.invoke.MethodHandles$Lookup.checkAccess(MethodHandles.java:1135)
>>>
>>>                    at
>>> java.lang.invoke.MethodHandles$Lookup.getDirectConstructor(MethodHandles.jav
>>> a:1243)
>>>
>>>                    at
>>> java.lang.invoke.MethodHandles$Lookup.linkMethodHandleConstant(MethodHandles
>>> .java:1270)
>>>
>>>                    at
>>> java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNa
>>> tives.java:381)
>>>
>>>                    ... 6 more
>>>
>>>
>>>
>>> If I convert method reference to lambda expression or anonymous class
>>> everything works correctly.  Checked with b68.
>>>
>>>
>>>
>>> Thank you
>>> Anna
>>>
>>>
>>>
>>>
>>
>
>