Currently the jasm output is:

$ jasm -v -nowarn -strict -fixcv 50:0-52:0 goto00101m1.jasm -d .
goto00101m1.jasm (11:36) Warning: The class file version is set to 52:0 by the option "-fixcv 50:0-52:0"
public class goto00101m1 version 45:3 {
                                    ^
1 warning(s)

expected result:
$ jasm -v -nowarn -fixcv 50:0-52:0 goto00101m1.jasm -d .
and for the command:
$ jasm -v -nowarn -strict -fixcv 50:0-52:0 goto00101m1.jasm -d .
goto00101m1.jasm (11:36) Error: The class file version is set to 52:0 by the option "-fixcv 50:0-52:0"
public class goto00101m1 version 45:3 {
                                    ^
1 error(s)