ADDITIONAL SYSTEM INFORMATION :
only tested on Ubuntu 22.04.2 LTS.

A DESCRIPTION OF THE PROBLEM :
when tried to compile a code with a switch case, a bug pops up.


REGRESSION : Last worked in version 18

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
class Main{

        public static void main(String ... args){

        String operator = "+";
        String writtenOperator = (switch(operator){
                case "+" -> "PLUS";
                case "-" -> "Minus";
                default -> "Unbekannter Operator";
        }).toUpperCase();
        System.out.printf("%s\n", writtenOperator);
        }
}


then just try to compile with: javac Main.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The result should be in this case just a "PLUS"
ACTUAL -
result can only be seen if its not compiled but directly interpreted with:
java Main.java

---------- BEGIN SOURCE ----------
see steps to reproduce.
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
see Actual Result. or with If-else.


FREQUENCY : always