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bug#7127: 23.2; M-x help throws an error

From: Glenn Morris
Subject: bug#7127: 23.2; M-x help throws an error
Date: Tue, 28 Sep 2010 19:27:15 -0400
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Aidan Kehoe wrote:

> 1) emacs -Q
> 2) M-x help RET
> 3) Observe error giving following backtrace: 
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)

I cannot reproduce this.

> The issue seems to be make-help-screen in help-macro.el, which assumes
> that (documentation FNAME) gives non-nil, something not true for
> #'help.

(documentation #'help)

returns "Help command." for me in Emacs 23.2.

> In GNU Emacs 23.2.1 (i686-pc-cygwin, GTK+ Version 2.18.6)
>  of 2010-05-08 on laptop

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