A DESCRIPTION OF THE PROBLEM :
Compiling the provided snippet results in an error. Compilation with `-Xdiags:verbose` succeeds.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javac Test.java
javac -Xdiags:verbose Test.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
class files created
ACTUAL -
First command results in an error:
Test.java:13: error: incompatible types: invalid method reference
                .forEach(CorridorProperties::toJson);
                         ^
    method toJson in class CorridorProperties cannot be applied to given types
      required: no arguments
      found: Object
      reason: actual and formal argument lists differ in length
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error

Second command succeeds.

---------- BEGIN SOURCE ----------
import java.util.List;
import java.util.function.Function;

public class Test {

    public static class CorridorProperties { public void toJson() {} }
    public interface CorridorPropertiesResolver { CorridorProperties resolveFor(Object ctx); }

    private void corridorProperties() {
        wrap(user -> {
            List.<CorridorPropertiesResolver>of().stream()
                .map(resolver -> resolver.resolveFor(user))
                .forEach(CorridorProperties::toJson);
            return null;
        });
    }


    private static Object wrap(Function<String, Void> handler) {
        return null;
    }
}

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

FREQUENCY : always