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-rw-r--r--lisp/emacs-lisp/byte-opt.el6
1 files changed, 4 insertions, 2 deletions
diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index cfa407019a7..66a117fccc8 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -284,8 +284,10 @@
;; If `fn' is from the same file, it has already
;; been preprocessed!
`(function ,fn)
- (byte-compile-preprocess
- (byte-compile--reify-function fn)))))
+ ;; Try and process it "in its original environment".
+ (let ((byte-compile-bound-variables nil))
+ (byte-compile-preprocess
+ (byte-compile--reify-function fn))))))
(if (eq (car-safe newfn) 'function)
(byte-compile-unfold-lambda `(,(cadr newfn) ,@(cdr form)))
;; This can happen because of macroexp-warn-and-return &co.