javac reports the following definite assignment error after the fix for JDK-8043179. The error is surprising to me, since the lambda doesn't reference 'x' at all. Is this expected?

$ cat T.java
public class T {

  private final int x;

  public T() {
    try {
      Runnable r =
          () -> {
            try {
              return;
            } catch (Exception e) {
              throw new AssertionError(e);
            }
          };
    } catch (Exception e) {
    }
    x = 42;
  }
}

$ javac -fullversion T.java
javac full version "20-ea+35-2342"
OK

$ javac -fullversion T.java
javac full version "21-ea+16-1326"
T.java:17: error: variable x might already have been assigned
    x = 42;
    ^
1 error