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-rw-r--r--lisp/emacs-lisp/inline.el4
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/inline.el b/lisp/emacs-lisp/inline.el
index c774296084e..ddbd6fdc017 100644
--- a/lisp/emacs-lisp/inline.el
+++ b/lisp/emacs-lisp/inline.el
@@ -80,7 +80,9 @@
(error "inline-const-p can only be used within define-inline"))
(defmacro inline-const-val (_exp)
- "Return the value of EXP."
+ "Return the value of EXP.
+During inlining, if the value of EXP is not yet known, this aborts the
+inlining and makes us revert to a non-inlined function call."
(declare (debug t))
(error "inline-const-val can only be used within define-inline"))