Macroexpansion with lazy seqs occurs in the wrong ns

[yuhan0]

Expected behavior

Cider-nrepl's macroexpansion op should produce the same output as manually calling macroexpand.

Actual behavior

If the macro definition contains lazily evaluated seqs, their contents will be evaluated with the wrong dynamic ns bindings (in the user ns), which can result in incorrect / misleading expansions.

Steps to reproduce the problem

(ns repro)

(defmacro lazy []
  (cons (ns-name *ns*)
        (lazy-seq [(ns-name *ns*)])))

(macroexpand '(lazy))
;; => (repro repro)

(lazy) ;; <- M-x cider-macroexpand: (repro user)

Environment & Version information

cider-nrepl version

0.49.1

Java version

21.0.1

Operating system

MacOS 14

[yuhan0]

Note: working on the fix, will submit a PR soon

[alexander-yakushev]

Fixed in #894.