Case insensitive option with separator does not work

[mvanle]

I am using "jcommander-1.72.jar". 

JCommander does not find the parameter name when parameters are set to case-insensitive and a separator is being used:

package test;

import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;
import com.beust.jcommander.ParameterException;

@Parameters(separators = "=")
public class Main
{
    @Parameter(names={"--argval"})
    String argval;

    public static void main(String[] args)
    {
        JCommander jct;
           
        Main main = new Main();
       
        /* Case sensitive with separator is OK */
        args = new String[] {"--argval=abc"};
        jct = JCommander.newBuilder().addObject(main).build();
        jct.setCaseSensitiveOptions(true);
        jct.parse(args);
        System.out.println("OK: " + main.argval);
       
        /* Case in-sensitive with separator FAILS */
        try
        {
            args = new String[] {"--ARGVAL=def"};
            jct = JCommander.newBuilder().addObject(main).build();
            jct.setCaseSensitiveOptions(false);
            jct.parse(args);

            System.out.println("OK: " + main.argval);
        }
        catch (ParameterException e)
        {
            System.err.println("FAIL: " + e);
        }

        /* Case in-sensitive with no separator is OK */
        args = new String[] {"--ARGVAL", "ghi"};
        jct = JCommander.newBuilder().addObject(main).build();
        jct.setCaseSensitiveOptions(false);
        jct.parse(args);        
        System.out.println("OK: " + main.argval);
    }
}

Expected output:

OK: abc
OK: def
OK: ghi

Actual output:

OK: abc
FAIL: com.beust.jcommander.ParameterException: Unknown option: --ARGVAL=def
OK: ghi