GNU bug report logs - #28176
26.0.50; [macOS] Emacs hangs on entering a specific article in gnus

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From: charles <at> aurox.ch (Charles A. Roelli)
To: Sam Steingold <sds <at> gnu.org>
Cc: eliz <at> gnu.org, 28176 <at> debbugs.gnu.org, alan <at> idiocy.org, npostavs <at> users.sourceforge.net
Subject: bug#28176: 26.0.50; Emacs hangs on entering a specific article in gnus
Date: Wed, 23 Aug 2017 16:29:35 +0200

> From: Sam Steingold <sds <at> gnu.org>
> Date: Wed, 23 Aug 2017 09:34:53 -0400
> Cc: Eli Zaretskii <eliz <at> gnu.org>, 28176 <at> debbugs.gnu.org,  	Noam Postavsky <npostavs <at> users.sourceforge.net>
> 
> if you use gdb, you can tap into the src/.gdbinit and its "x" and "p" commands.
> 

Seems like this may be a side effect of a recent change adding GIF
support in macOS (I'm CCing the author, Alan Third).

In nsimage.m:111 (ns_load_image), there is this call to add_to_log:

add_to_log ("Unable to set index %d for image %s", index, img->spec);

but img->spec is a Lisp_Object:

(gdb) ptype img->spec
type = struct Lisp_Object {
    EMACS_INT i;
}

Maybe "%s" doesn't cover Lisp_Objects?  At any rate, that seems to be
what the error message is about.

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