The following example fails with an unexpected MatchException when compiled with JDK 25 and executed on JDK 21.

The change bisects to between jdk-23+7 and jdk-23+8, I think the culprit may be JDK-8303374 (Implement JEP 455: Primitive Types in Patterns, instanceof, and switch)

class B {

  sealed interface Foo {}
  record StringRecord(String s, boolean b) implements Foo {}
  record LongRecord(long a, boolean b) implements Foo {}

  static String string4(Foo foo) {
    return switch (foo) {
      case StringRecord(String s, boolean b) when b -> s;
      case StringRecord(String s, boolean b) -> s;
      case LongRecord(long a, boolean b) when b -> Long.toString(a);
      case LongRecord(long a, boolean b) -> Long.toString(a);
    };
  }

  public static void main(String[] args) {
    System.out.println(string4(new LongRecord(42, true)));
  }
}

$JDK21/bin/javac --release 21 B.java && $JDK21/bin/java B
42

$JDK25/bin/javac --release 21 B.java && $JDK21/bin/java B
Exception in thread "main" java.lang.MatchException
        at B.string4(B.java:8)
        at B.main(B.java:17)

$JDK25/bin/javac --release 21 B.java && $JDK25/bin/java B
42