bug#64272: 28.1; lisp_file_lexically_bound_p behavior mismatches file local variables

[LdBeth <andpuke@foxmail.com>]

Basically, if an emacs lisp source file starts with some whitespace

| ;; -*- lexical-binding: t -*-
|(let ((x 1)) (setq foo (lambda () x)))
|(funcall foo)

rather than

|;; -*- lexical-binding: t -*-
|(let ((x 1)) (setq foo (lambda () x)))
|(funcall foo)

that will cause `load' eval the file with `lexical-binding' set to nil,
and would report `x' is a void variable.

This behavior is in contrast to how file local variables are applied
when opening a file, that is, as long as the variable list is in
the first line, it is applied.

Either the documentation should bring up this behavior, or the
C function `lisp_file_lexically_bound_p' in `src/lread.c' should be fixed.



-- 
ldb