ADDITIONAL SYSTEM INFORMATION :
Windows 10

A DESCRIPTION OF THE PROBLEM :
I tried concat two string with null. -XX:+ShowCodeDetailsInExceptionMessages has to show the exact variable name which is null. Instead it shows "str" is null.

Please look into it.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute this program:

package jdk14.newfeatures.nullpointerexcptn;

public class NullPointerExcptn {

//static Object obj = null;

public static void main(String[] args) {

//obj.hashCode();
String firstname = "Andrea";
String lastname = null;

System.out.println(firstname.concat(lastname));

}

}




EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.isEmpty()" because "lastname" is null
at java.base/java.lang.String.concat(String.java:1965)
at jdk14.newfeatures.nullpointerexcptn.NullPointerExcptn.main(NullPointerExcptn.java:13)

ACTUAL -
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.isEmpty()" because "str" is null
at java.base/java.lang.String.concat(String.java:1965)
at jdk14.newfeatures.nullpointerexcptn.NullPointerExcptn.main(NullPointerExcptn.java:13)


---------- BEGIN SOURCE ----------
package jdk14.newfeatures.nullpointerexcptn;

public class NullPointerExcptn {

//static Object obj = null;

public static void main(String[] args) {

//obj.hashCode();
String firstname = "Andrea";
String lastname = null;

System.out.println(firstname.concat(lastname));

}

}

---------- END SOURCE ----------