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Is there some important shortcoming of all the existing Common Lisp implementations that you would like to correct?
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Awaiting answers. Seems stepping is one.

Btw, I stick to sbcl as I used vim and so far the script here works for me. Might try this when back to do lisp.

https://susam.net/lisp-in-vim.html

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Yeah, advanced debugging features like watchpoints are very important to me
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