It supports modifying code in the middle of an error and continuing on? I hadn’t found that in a Scheme before!
Gambit v4.9.5
> (let ((x 10) (y (- 1 1))) (\* (/ x y) 2))
\*\* ERROR IN (stdin)@1.30 -- Divide by zero
(/ 10 0)
1> ,e
x = 10
y = 0
1> (set! y 2)
1> ,(c y)
4
>