Spurious error when opening clj files for the first time

[dhleong]

|| mantel error:Execution error at user/eval19552 (REPL:1).^@No namespace: vtolvr-compiler.files found

[dhleong]

Seems to be caused by the mantel#refers#Fetch() or mantel#ns#ParseReferredPath() proc. As mentioned in the above reference, it could be caused by accidentally avoiding fireplace's namespace preload proc.

I also noticed it when opening a cljs file in a shadow-cljs project if I didn't have the watch running, but it's easier to repro in a normal clj project.