Recent updates up to v21.03
wiping master branch
snapshot of files on 2021-03-03 fb73405
this repo is just a mirror
Hm. rev77 is where the bug was introduced. Sorry, I poorly explained. Bug is due to overflow in multiplication, which may give negative with two positive numbers, for example.
Kevin, sorry, but there is some mystery. I think I see this in current trunk: https://sourceforge.net/p/tinyscheme/code/HEAD/tree/trunk/scheme.c#l475
Modulo bug due to internal multiplication (from GIMP repo)