* lisp/emacs-lisp/syntax.el (syntax-propertize): Flush extended region.

diff --git a/lisp/emacs-lisp/syntax.el b/lisp/emacs-lisp/syntax.el
index 31fc67ec8156fe1c44ab9a8b93a446ea540df24f..ac509b3465d40db0c37565891dc6c1536a047342 100644 (file)
--- a/lisp/emacs-lisp/syntax.el
+++ b/lisp/emacs-lisp/syntax.el
@@ -316,6 +316,9 @@ END) suitable for `syntax-propertize-function'."
                   (unless (eq funs
                               (cdr syntax-propertize-extend-region-functions))
                     (setq funs syntax-propertize-extend-region-functions)))))
+            ;; Flush ppss cache between the original value of `start' and that
+            ;; set above by syntax-propertize-extend-region-functions.
+            (syntax-ppss-flush-cache start)
             ;; Move the limit before calling the function, so the function
             ;; can use syntax-ppss.
             (setq syntax-propertize--done end)