A bug in gcd and lcm (Number Theory) ?

[LSAXYZ321]

I noticed that the functions gcd (Greatest Common Divisor) and lcm (Least Common Multiple) found in Functions - Number Theory , won't accept and input with only 2 variables although the UI says the third variable is optional
So with an input as the following
gcd(60; 40; )
lcm(60; 40; )
, I get the following answer:
"Argument 3, Value 3, in gcd() must be a free value that is rational (polynomial).""

If I type variable 1 or 2 in at the third optional place, the calculation is done, but that shouldn't be necessary

BR Lars

[hanna-kn]

In gcd(60; 40; ) the third argument is specified (as an empty expression). Use gcd(60; 40) and lcm(60; 40), without the second semicolon, instead.

There was however a bug (now fixed) which caused inclusion of empty optional arguments in output from insert function dialog.