CC Mode: Fix error in macro cache. This fixes bug #36802

* lisp/progmodes/cc-engine.el (c-invalidate-macro-cache): Add in a cond arm
to handle the change position being less than the recorded CPP contruct end.

diff --git a/lisp/progmodes/cc-engine.el b/lisp/progmodes/cc-engine.el
index 37d4591fc962204ff78397a017fbe9e459b7e59d..a095277989a8579acc808a40f044b93f01d639d4 100644 (file)
--- a/lisp/progmodes/cc-engine.el
+++ b/lisp/progmodes/cc-engine.el
@@ -269,6 +269,11 @@
    ((and (cdr c-macro-cache)
         (< beg (cdr c-macro-cache)))
     (setcdr c-macro-cache nil)
+    (setq c-macro-cache-start-pos beg
+         c-macro-cache-syntactic nil
+         c-macro-cache-no-comment nil))
+   ((and c-macro-cache-start-pos
+        (< beg c-macro-cache-start-pos))
     (setq c-macro-cache-start-pos beg
          c-macro-cache-syntactic nil
          c-macro-cache-no-comment nil))))