Re: Building the igc branch on MS-Windows

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> I've added a fix_font, so we should be good now in any case.
>>
>> It seems to crash:
>>
>>   Thread 1 received signal SIGSEGV, Segmentation fault.
>>   fix_lisp_obj (ss=ss@entry=0x6fdf358, pobj=0x14379823) at igc.c:399
>>   399         mps_word_t word = *p;
>>
>> Looks like the pointer to the font points to a bad object?
>
> Very strange. The font looks okay insofar as the header in dflt_scan
> shows.
>
> (lldb) p *header
> (igc_header)  (obj_type = IGC_OBJ_VECTOR, pvec_type = PVEC_FONT, hash = 22015, nwords = 15)
>
> But its contents are weird
>
> (lldb) p *f
> (font) {
>   header = (size = 4611686019048144909)
>   props = {
>     [0] = NULL
>     [1] = NULL
>     [2] = NULL
>     [3] = NULL
>     [4] = 0x00000000023e3e30 (struct Lisp_Symbol *) $10 = 0x0000000102ffbbd8
>     [5] = NULL
>     [6] = NULL
>     [7] = NULL
>     [8] = NULL
>     [9] = NULL
>     [10] = NULL
>     [11] = NULL
>     [12] = NULL
>     [13] = 0x00000006154b8808 (struct Lisp_Symbol *) $11 = 0x00000007160d05b0
>     [14] = 0x0000000000000004 (struct Lisp_String *) $12 = NULL
>     [15] = 0x000000000000005a (EMACS_INT) $13 = 22
>     [16] = 0x0000000102fdcc6d (struct Lisp_Vector *) $14 = 0x0000000102fdcc68
>   }
>   min_width = 52631005
>
> This one for example ^^^
>
>   max_width = 1
>   pixel_size = 2
>   height = 0
>   space_width = 357275656
>   average_width = 6
>   ascent = 4
>   descent = 0
>   underline_thickness = 0
>   underline_position = 0
>   vertical_centering = true
>   baseline_offset = 1
>   relative_compose = 0
>   default_ascent = 0
>   encoding_charset = 10
>   repertory_charset = 0
>   driver = 0x00000006154b9008
> }

(lldb) p *header
(igc_header)  (obj_type = IGC_OBJ_VECTOR, pvec_type = PVEC_FONT, hash = 22015, nwords = 15)
(lldb) p sizeof (struct font)
(unsigned long) 216
(lldb) p sizeof (struct font) / 8
(unsigned long) 27
(lldb) p obj_size (sizeof (struct font))
(size_t) 224
(lldb) p to_words (224)
(mps_word_t) 28
(lldb)

Heh? That makes no sense at all.