Possible "off by one" error in c-guess-basic-syntax

[Alan M. <ac...@mu...>]

cc-mode V 5.28:

With the following function:

1    int foo (int a)
2    {
3        a += 2 ;
4        return a ;
5    }

, c-show-syntactic-information (C-c C-s) gives:
    "defun-open"          L2, 
    "defun-block-intro"   L3,
    "statement"           L4.
    "defun-close"         L5

However, if the buffer is narrowed such that the opening brace on L2 is
at the very start of the accessible portion, c-show-syntactic-information
gives:
    "defun-open"          L2
    "topmost-intro-cont"  L3
    "topmost-intro"       L4
    "topmost-intro"       L5.

The immediate cause of this is at line 1634 in cc-engine.el (V 5.28):

              ;; ignore the bufpos if its been narrowed out by the
              ;; containing class or does not contain the indent point
1634 =====>   (if (or (<= containing-sexp (point-min))
                      (>= containing-sexp indent-point))
                  (setq containing-sexp nil)))))

Should the "<=" in this line not simply be a "<"?

-- 
Alan Mackenzie (Munich, Germany)
ac...@mu...