> "Undefine Function" That's the key; if you delete a function make sure to undefine it so it's not sticking around in the image. In slime you can use `C-c C-

> "Undefine Function" That's the key; if you delete a function make sure to undefine it so it's not sticking around in the image. In slime you can use `C-c C-u` which is bound to FMAKUNBOUND.