Commit 285ed416 authored by Artur Malabarba's avatar Artur Malabarba

* lisp/character-fold.el (character-fold-to-regexp): Be careful

not to return huge regexps.
parent 4c6f368c
......@@ -150,9 +150,8 @@ Any character in STRING that has an entry in
`character-fold-table' is replaced with that entry (which is a
regexp) and other characters are `regexp-quote'd.
Note that this function can potentially return regexps too long
for Emacs to handle. If STRING is longer than 30 characters,
consider not using this function.
If the resulting regexp would be too long for Emacs to handle,
just return the result of calling `regexp-quote' on STRING.
FROM is for internal use. It specifies an index in the STRING
from which to start."
......@@ -222,7 +221,11 @@ from which to start."
(setq i (1+ i)))
(when (> spaces 0)
(push (character-fold--make-space-string spaces) out))
(apply #'concat (nreverse out))))
(let ((regexp (apply #'concat (nreverse out))))
;; Limited by `MAX_BUF_SIZE' in `regex.c'.
(if (> (length regexp) 32000)
(regexp-quote string)
;;; Commands provided for completeness.
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