Hi,

This summer I have had some fun trying to figure out how to implement a super 
simple toy Forth. For a start, I chose PicoLisp as an implementation language. 
You may find it here:

https://github.com/jkleiser/toy-forth-in-picolisp

There is one problem, however, occurring quite regularly when I run this 
forth.l using 32-bit PicoLisp on Mac. As the README.md suggests, I start it by 
doing this

pil path/to/forth.l +

If I then enter “: ff 0 if 77 else 88 then ;” (without the quotes), which 
defines a new word “ff” (which when used always pushes 88 on the stack), and 
then enter “t”, which is a (non-standard) word just for checking the state of 
the “tempStack” field (probably empty), then I usually get a “Segmentation 
fault: 11”.

I have not seen that problem when using 64-bit PicoLisp (in Docker).

Is this Segmentation fault caused by a bug in 32-bit PicoLisp, or is it me 
doing something stupid?

Have a nice weekend!

/Jon

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