On Wed, Feb 2, 2011 at 1:00 AM, Stefan Monnier <monnier@iro.umontreal.ca> wrote:

> When I step through this function:

> (defun foo ()
> (interactive)
> (when (called-interactively-p 'any)
> (message "Interactive!")
> 'foo-called-interactively))

> (called-interactively-p 'any) is nil even when called interactively. Is
> this a bug?

Yes, it's a known bug: stepping through a function with Edebug is done
by rewriting the function, and called-interactively-p is a hackish
function that doesn't have a clean enough semantics to survive
this rewrite.
That's one of the reasons the docstring says:

This function is meant for implementing advice and other
function-modifying features. Instead of using this, it is sometimes
cleaner to give your function an extra optional argument whose
`interactive' spec specifies non-nil unconditionally ("p" is a good
way to do this), or via (not (or executing-kbd-macro noninteractive)).

So I'd recommend you use the interactive spec instead, as in:

(defun foo (am-i-interactive)
(interactive "p")
(when am-i-interactive

(message "Interactive!")
'foo-called-interactively))

-- Stefan