A DESCRIPTION OF THE PROBLEM :
The provided code not compiled, although it seems should.

REGRESSION : Last worked in version 11.0.14

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile provided code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The code to be compiled.
ACTUAL -
The compilation error:

error: incompatible types: invalid method reference
                    .map(URI::create)
                         ^
    incompatible types: Object cannot be converted to String

---------- BEGIN SOURCE ----------
package example;

import java.net.URI;
import java.net.http.HttpResponse;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Main {
    public static void main(String[] args) {
    }

    static <T> void test() {
        CompletableFuture<HttpResponse<T>> f = CompletableFuture.completedFuture(null);

        f.thenApplyAsync(response -> {
            Stream.of("Location", "Content-Location")
                    .flatMap(s -> response.headers().allValues(s).stream())
                    .map(URI::create)
                    .collect(Collectors.toList());

            return response;
        });
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
To not use lambda expression instead of method reference.

FREQUENCY : always