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CC Mode: Fix the handling of two adjacent after-change-functionses.

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The bug involved failing to set c-new-END correctly, which lead to an
args-out-of-range error when after-change-functions was invoked twice without
an intervening invocation of before-change-functions.

* lisp/progmodes/cc-mode.el (c-after-change): Correct a coding error in the
handling of c-just-done-before-change.
This commit is contained in:
Alan Mackenzie 2020-03-04 21:17:04 +00:00
parent a1abf73c76
commit a3c2d186eb
1 changed files with 6 additions and 7 deletions
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13
lisp/progmodes/cc-mode.el
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@ -1992,17 +1992,16 @@ Note that this is a strict tail, so won't match, e.g. \"0x....\".")
;; Note: c-just-done-before-change is nil, t, or 'whole-buffer.
(unless (c-called-from-text-property-change-p)
(save-restriction
(widen)
(unless c-just-done-before-change
(c-before-change (point-min) (point-max)))
(unless (eq c-just-done-before-change t)
(unless (eq c-just-done-before-change t)
(save-restriction
(widen)
(when (null c-just-done-before-change)
(c-before-change (point-min) (point-max)))
(setq beg (point-min)
end (point-max)
old-len (- end beg)
c-new-BEG (point-min)
c-new-END (point-max)))
(setq c-just-done-before-change nil)))
c-new-END (point-max)))))
;; (c-new-BEG c-new-END) will be the region to fontify. It may become
;; larger than (beg end).