Hi, Actually it's my own bug but let me report here: (scheme base) lacks implementation for string-for-each thus following code does not work;
(import (scheme base)) (string-for-each (lambda (e f) 'ok) "01234" "slas") Please note that we already have incompatible string-for-each for SRFI-13 and R6RS. (It seems current (scheme base) uses SRFI-13 one) R7RS for-each (and map) procedures allow different length of collection as arguments. Checked on 2b4e45ca1b89a942200b7b9f46060dddc44d2876