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-rw-r--r--lisp/emacs-lisp/byte-opt.el8
1 files changed, 5 insertions, 3 deletions
diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index 9ce3c2eb323..ac008c98cd9 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -383,9 +383,11 @@
form))
((or (byte-code-function-p fn)
(eq 'lambda (car-safe fn)))
- (byte-optimize-form-code-walker
- (byte-compile-unfold-lambda form)
- for-effect))
+ (let ((newform (byte-compile-unfold-lambda form)))
+ (if (eq newform form)
+ ;; Some error occured, avoid infinite recursion
+ form
+ (byte-optimize-form-code-walker newform for-effect))))
((memq fn '(let let*))
;; recursively enter the optimizer for the bindings and body
;; of a let or let*. This for depth-firstness: forms that