ADDITIONAL SYSTEM INFORMATION :
javac --enable-preview -source 20

both be reproducible
java version "20.0.1" 2023-04-18
openjdk version "21-ea" 2023-09-19

I use VSCode and Extension Pack for Java to compile or run.

A DESCRIPTION OF THE PROBLEM :
I could not determine what happens at all, but seems to be reproducible on general environment.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run following class.
The class is successfully compiled but cannot be run.

ACTUAL -
different by yield new Object(); or yield null;

By yield new Object();

java.lang.VerifyError: Operand stack underflow
Exception Details:
  Location:
    com/example/RecordPreview.test()V @66: astore
  Reason:
    Attempt to pop empty stack.
  Current Frame:
    bci: @66
    flags: { }
    locals: { 'com/example/RecordPreview', top, null, integer }
    stack: { }
  Bytecode:
    0000000: 0159 b800 1357 4d03 3e2c 1dba 0019 0000
    0000010: aa00 0000 0000 0079 0000 0000 0000 0001
    0000020: 0000 0018 0000 002a a700 0804 3ea7 ffdc
    0000030: bb00 0359 b700 08a7 0053 a700 0805 3ea7
    0000040: ffca 3a09 0159 b800 1357 3a06 0336 0719
    0000050: 0615 07ba 001d 0000 aa00 0000 0000 0027
    0000060: 0000 0000 0000 0000 0000 0014 a700 0904
    0000070: 3607 a7ff dd01 3a0a 1909 190a a700 0e01
    0000080: 3a0a 1909 190a a700 0401 4cb1
  Stackmap Table:
    full_frame(@9,{Object[#1],Top,Null,Integer},{})
    same_frame(@40)
    same_frame(@43)
    same_frame(@48)
    same_frame(@58)
    same_frame(@61)
    same_frame(@66)
    full_frame(@79,{Object[#1],Top,Null,Integer,Top,Top,Null,Integer,Top,Object[#3]},{})
    same_frame(@108)
    same_frame(@111)
    same_frame(@117)
    same_frame(@127)
    full_frame(@137,{Object[#1],Top,Null,Integer},{})
    full_frame(@138,{Object[#1]},{Object[#3]})

By yield null;

java.lang.ClassFormatError: Field " yieldValue0" in class com/example/RecordPreview has illegal signature "N"

---------- BEGIN SOURCE ----------
package com.example;

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

    private void test() {
        Object o = switch (null) {
            case SealedA() -> {
                yield new Object();
                // yield null;
            }
            case SealedB() -> {
                yield switch (null) {
                    case SealedC() -> {
                        try {
                        } catch (Exception e) {
                        }
                        yield null;
                    }
                    default -> null;
                };
            }
            default -> null;
        };
    }

    public sealed interface SealedRecord {
    }

    public static record SealedA() implements SealedRecord {
    }

    public static record SealedB() implements SealedRecord {
    }

    public sealed interface SealedRecord1 {
    }

    public static record SealedC() implements SealedRecord1 {
    }
}
---------- END SOURCE ----------

FREQUENCY : always