FULL PRODUCT VERSION :
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+161)

A DESCRIPTION OF THE PROBLEM :
The following code compiles with javac 8 but not on 9-ea+161.
The code involves a method reference to a generic method and a wildcard.

REGRESSION. Last worked in version 8u102

ADDITIONAL REGRESSION INFORMATION:
tested with 1.8.0_92-b14

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile the code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Successful compilation
ACTUAL -
Compilation fails. The details in the error message are surprising: "Map<CAP#1,Integer> cannot be converted to X<Integer>". There is no attempt made to convert a Map to X, it's as if the compiler has confused the interface with the return type of the method in the interface.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Test.java:16: error: incompatible types: cannot infer type-variable(s) O
    go(Test::a);
      ^
    (argument mismatch; Map<CAP#1,Integer> cannot be converted to X<Integer>)
  where O is a type-variable:
    O extends Object declared in method <O>go(X<O>)
  where CAP#1 is a fresh type-variable:
    CAP#1 extends Object from capture of ?
1 error

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.Map;

/**
 * @author Wouter Coekaerts
 */
class Test {
  interface X<O> {
    Map<?, O> apply();
  }

  <O> void go(X<O> x) {}

  static <I> Map<?, Integer> a() {return null;}

  void test() {
    go(Test::a);
  }
}

---------- END SOURCE ----------