I'm seeing a WrongMethodTypeException with pattern matching on switch and sealed classes, when compiling with a recent JDK 23 javac version and targeting JDK 21 with --release.

The change bisects to JDK-8303374 (Implement JEP 455: Primitive Types in Patterns, instanceof, and switch (Preview))

Repro:

public class Z {

  public static void main(String[] args) {
    f(new P());
    f(new O());
  }

  private static void f(I info) {
    switch (info) {
      case P p -> System.err.println(p);
      case O o -> System.err.println(o);
    }
  }

  static sealed interface I permits P, O {}
  private abstract static class A {}
  static final class P extends A implements I {}
  static final class O extends A implements I {}
}

Compile with a JDK 23 javac, and --release 21:

$ javac -fullversion
javac full version "23-ea+14-1075"
$ javac --release 21 Z.java

Executing on JDK 21 fails:

$ java -fullversion
openjdk full version "21-ea+34-2500"
$ java Z
Exception in thread "main" java.lang.BootstrapMethodError: CallSite bootstrap method initialization exception
        at java.base/java.lang.invoke.CallSite.makeSite(CallSite.java:345)
        at java.base/java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:274)
        at java.base/java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:264)
        at Z.f(Z.java:9)
        at Z.main(Z.java:4)
Caused by: java.lang.invoke.WrongMethodTypeException: MethodHandle(Object,int)int should be of type (I,int)int
        at java.base/java.lang.invoke.CallSite.wrongTargetType(CallSite.java:204)
        at java.base/java.lang.invoke.CallSite.makeSite(CallSite.java:334)
        ... 4 more

The difference between JDK 21 javac and JDK 23 javac output is:

< 11: invokedynamic #25, 0 // InvokeDynamic #0:typeSwitch:(Ljava/lang/Object;I)I
---
> 11: invokedynamic #25, 0 // InvokeDynamic #0:typeSwitch:(LZ$I;I)I