Question: How to use goto without “System error”

Let's put aside the drawbacks of using goto for now. Below is the program I wrote. When I run it, it seems to execute, but the Maple interface displays the message "System error,,at top level". Does this trigger an internal warning in Maple?

for i to 4 do
    for j to 4 do
         print([i,j]):
        if i = 2 and j = 3 then
             goto(al):
        end if:
    end do:
end do:
al;

                             [1, 1]

                             [1, 2]

                             [1, 3]

                             [1, 4]

                             [2, 1]

                             [2, 2]

                             [2, 3]

                  System error, , at top level

                               al