Random errors and warnings due to load-slow-deps!

[metametadata]

I directly use rebel-readline.core/with-line-reader, rebel-readline.jline-api/safe-terminal-writer, etc. and I've observed different random exceptions and warnings logs on starting my REPL. Some examples:

• java.lang.IllegalAccessError: whitespace? is not public
• whitespace? does not exist
• char is not public
• No such var: i/inspect

• WARNING: logs:

  WARNING: tagged-literal? already refers to: #'clojure.core/tagged-literal? in namespace: clojure.tools.reader.impl.utils, being replaced by: #'clojure.tools.reader.impl.utils/tagged-literal?
  WARNING: reader-conditional? already refers to: #'clojure.core/reader-conditional? in namespace: clojure.tools.reader.impl.utils, being replaced by: #'clojure.tools.reader.impl.utils/reader-conditional?
  ...

Investigating the stack traces, looks like they are caused by async require calls in rebel-utils/load-slow-deps! leading to some race condition.

My workaround was to make this helper synchronous:

(alter-var-root #'rebel-utils/load-slow-deps!
                (constantly
                  #(do
                     (require 'cljfmt.core)
                     (require 'compliment.core))))