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bug#18573: 24.3.93; set-face-attribute crashes Emacs when started with -
bug#18573: 24.3.93; set-face-attribute crashes Emacs when started with -nw
Sun, 28 Sep 2014 14:24:21 +0200
On 28/09/2014 10:44, Jan Djärv wrote:
27 sep 2014 kl. 18:13 skrev address@hidden:
When launched via terminal (cli), Emacs crashes by just having this single line
(set-face-attribute 'default nil :font "Menlo-16")
Emacs does /not/ crash when launched from the Finder (same init.el)
This seems to be a generic error in xfaces.c. It tries to load a font without
checking the type
of frame. The type is tty, but it tries to load a font anyway, and eventually
ends up in (font.c) font_pixel_size, which does:
#define FRAME_RES_Y(f) \
(eassert (FRAME_WINDOW_P (f)), FRAME_DISPLAY_INFO (f)->resy)
Now, FRAME_DISPLAY_INFO for a NS compiled Emacs is
#define FRAME_DISPLAY_INFO(f) ((f)->output_data.ns->display_info)
but the frame is not an NS frame, it is a tty frame, so bad things happen.
It is the same for X, but there it just happens to return a nonsense value, so
the code continues without crashing, and eventually discovers that there are no
font dirvers and the load font fails.
The code is in xfaces.c, Finternal_set_lisp_face_attribute, around line 3120
where it calls
The code in question is not called if compiled for a tty (#ifdef:ed out), but
it is called when the frame is a tty frame on a non-tty compiled Emacs.
I think these cases should be the same, i.e. font_load_for_lface not called for
Thank you, that sounds like the reason, although I am not fluent with C
nor gdb to check and confirm it.
I can add that Emacs just crashes printing this error:
Fatal error 11: Segmentation fault 51512 abort
Also, if that line is wrapped with condition-case err, like this:
(condition-case err (set-face-attribute 'default nil :font "Menlo-16")
(error (message "Whoops!")))
I experience the same crash with same error message. No additional
I have tried with GNU Emacs 24.3.1 (x86_64-apple-darwin, NS
apple-appkit-1038.36) of 2013-03-13 on bob.porkrind.org, from
emacsformacosx.com, and Emacs does not crash. So, it must be a bug in
I am of course aware that in any case Emacs will inherit whatever font
and font size is specified in the terminal app (basically, that line is
not meaningful in the cli).