From: Ergus <spacibba@aol.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: rudalics@gmx.at, emacs-devel@gnu.org
Subject: Re: Question about display engine
Date: Sun, 13 Oct 2019 21:38:36 +0200 [thread overview]
Message-ID: <20191013193836.jl3odnemyh6l7hzb@Ergus> (raw)
In-Reply-To: <831rvglbom.fsf@gnu.org>
On Sun, Oct 13, 2019 at 09:53:13PM +0300, Eli Zaretskii wrote:
>> Date: Sun, 13 Oct 2019 20:25:42 +0200
>> From: Ergus <spacibba@aol.com>
>> Cc: rudalics@gmx.at, emacs-devel@gnu.org
>>
>> >Then looking at the position that causes the error will probably tell
>> >you what's wrong. (Is OBJECT passed to Fget_text_property a string?
>> >if not, position of zero is invalid.)
>> >
>>
>> Actually conditioning the call to face_at_pos to when IT_CHARPOS (*it)
>> != 0 seems to fix the issue with magit... but maybe we are just hiding
>> something under the carpet here. Can you imagine something more general
>> than that just this condition?
>
>How did it happen that IT_CHARPOS(*it) is zero? If we are iterating
>over a buffer, that cannot happen, because we begin from 1 and go
>forward.
>
>Is it->sp zero or higher? If it's higher, then we are not iterating
>over a buffer, but something else (a string, an image, or something
>similar). What are the values of it->method and it->what? Can you
>show the result of
>
> (gdb) pgrowx it->glyph_row
>
(gdb) p it->sp
$1 = 0
(gdb) p it->method
$2 = GET_FROM_C_STRING
(gdb) p it->what
$3 = IT_CHARACTER
(gdb) pgrowx it->glyph_row
TEXT: 85 glyphs
0 0: CHAR[-] str=0x4fab1a8f[0] blev=0,btyp=L w=1 a+d=0+0 face=1
1 1: CHAR[U] str=0x4fab18f0[1] blev=0,btyp=L w=1 a+d=0+0 face=1
2 2: CHAR[U] str=0x4fab18f0[1] blev=0,btyp=L w=1 a+d=0+0 face=1
3 3: CHAR[U] str=0x4fab18f0[1] blev=0,btyp=L w=1 a+d=0+0 face=1
4 4: CHAR[:] str=0xf2787f0[0] blev=0,btyp=L w=1 a+d=0+0 face=1
5 5: CHAR[%] str=0x4faaee54[1] blev=0,btyp=L w=1 a+d=0+0 face=1
6 6: CHAR[%] str=0x4faaede4[1] blev=0,btyp=L w=1 a+d=0+0 face=1
7 7: CHAR[-] str=0x4fab1721[1] blev=0,btyp=L w=1 a+d=0+0 face=1
8 8: CHAR[-] str=0x4fa9d9a8[0] blev=0,btyp=L w=1 a+d=0+0 face=1
9 9: CHAR[F] str=0x4fa9d9a8[2] blev=0,btyp=L w=1 a+d=0+0 face=1
10 10: CHAR[1] str=0x4fa9d9a8[2] blev=0,btyp=L w=1 a+d=0+0 face=1
11 11: CHAR[ ] str=0x4fa9d9a8[3] blev=0,btyp=L w=1 a+d=0+0 face=1
12 12: CHAR[ ] str=0x4fa9d9a8[4] blev=0,btyp=L w=1 a+d=0+0 face=1
13 13: CHAR[m] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
14 14: CHAR[a] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
15 15: CHAR[g] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
16 16: CHAR[i] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
17 17: CHAR[t] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
18 18: CHAR[-] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
19 19: CHAR[l] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
20 20: CHAR[o] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
21 21: CHAR[g] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
22 22: CHAR[:] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
23 23: CHAR[ ] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
24 24: CHAR[e] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
25 25: CHAR[m] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
26 26: CHAR[a] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
27 27: CHAR[c] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
28 28: CHAR[s] str=0x4fab16fc[1] blev=0,btyp=L w=1 a+d=0+0 face=20 MB
29 29: CHAR[ ] str=0x4fab16f8[0] blev=0,btyp=L w=1 a+d=0+0 face=1
30 30: CHAR[ ] str=0x4fab16f8[1] blev=0,btyp=L w=1 a+d=0+0 face=1
31 31: CHAR[ ] str=0x4fab16f8[2] blev=0,btyp=L w=1 a+d=0+0 face=1
32 32: CHAR[T] str=0xf278800[1] blev=0,btyp=L w=1 a+d=0+0 face=1
33 33: CHAR[o] str=0xf278800[1] blev=0,btyp=L w=1 a+d=0+0 face=1
34 34: CHAR[p] str=0xf278800[1] blev=0,btyp=L w=1 a+d=0+0 face=1
35 35: CHAR[ ] str=0x4fa602e6[0] blev=0,btyp=L w=1 a+d=0+0 face=1
36 36: CHAR[L] str=0x4fa602e6[1] blev=0,btyp=L w=1 a+d=0+0 face=1
37 37: CHAR[1] str=0x4fa602e6[3] blev=0,btyp=L w=1 a+d=0+0 face=1
38 38: CHAR[ ] pos=-1 blev=0,btyp=B w=1 a+d=0+0 face=1
39 39: CHAR[ ] pos=-1 blev=0,btyp=B w=1 a+d=0+0 face=1
40 40: CHAR[ ] pos=-1 blev=0,btyp=B w=1 a+d=0+0 face=1
41 41: CHAR[ ] str=0x4fab16f5[0] blev=0,btyp=L w=1 a+d=0+0 face=1
42 42: CHAR[ ] str=0x4fab16f5[1] blev=0,btyp=L w=1 a+d=0+0 face=1
43 43: CHAR[(] str=0x4fab16e0[0] blev=0,btyp=L w=1 a+d=0+0 face=1
44 44: CHAR[M] str=0xf95dcc0[0] blev=0,btyp=L w=1 a+d=0+0 face=1
45 45: CHAR[a] str=0xf95dcc0[1] blev=0,btyp=L w=1 a+d=0+0 face=1
46 46: CHAR[g] str=0xf95dcc0[2] blev=0,btyp=L w=1 a+d=0+0 face=1
47 47: CHAR[i] str=0xf95dcc0[3] blev=0,btyp=L w=1 a+d=0+0 face=1
48 48: CHAR[t] str=0xf95dcc0[4] blev=0,btyp=L w=1 a+d=0+0 face=1
49 49: CHAR[ ] str=0xf95dcc0[5] blev=0,btyp=L w=1 a+d=0+0 face=1
50 50: CHAR[L] str=0xf95dcc0[6] blev=0,btyp=L w=1 a+d=0+0 face=1
51 51: CHAR[o] str=0xf95dcc0[7] blev=0,btyp=L w=1 a+d=0+0 face=1
52 52: CHAR[g] str=0xf95dcc0[8] blev=0,btyp=L w=1 a+d=0+0 face=1
53 53: CHAR[)] str=0x4fa729d9[0] blev=0,btyp=L w=1 a+d=0+0 face=1
54 54: CHAR[ ] str=0x4fa729ae[0] blev=0,btyp=L w=1 a+d=0+0 face=1
55 55: CHAR[-] str=0x4fa71e84[0] blev=0,btyp=L w=1 a+d=0+0 face=1
56 56: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
57 57: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
58 58: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
59 59: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
60 60: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
61 61: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
62 62: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
63 63: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
64 64: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
65 65: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
66 66: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
67 67: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
68 68: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
69 69: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
70 70: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
71 71: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
72 72: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
73 73: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
74 74: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
75 75: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
76 76: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
77 77: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
78 78: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
79 79: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
80 80: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
81 81: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
82 82: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
83 83: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
84 84: CHAR[-] str=0x4fa71e84[2] blev=0,btyp=L w=1 a+d=0+0 face=1
next prev parent reply other threads:[~2019-10-13 19:38 UTC|newest]
Thread overview: 183+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191012222305.jpjinkd5y2lz6xiv@Ergus>
[not found] ` <83mue5kmfx.fsf@gnu.org>
2019-10-13 15:40 ` Question about display engine Ergus
2019-10-13 16:06 ` Eli Zaretskii
2019-10-13 16:44 ` Ergus
2019-10-13 17:04 ` Eli Zaretskii
2019-10-13 18:11 ` Ergus
2019-10-13 18:25 ` Ergus
2019-10-13 18:53 ` Eli Zaretskii
2019-10-13 19:38 ` Ergus [this message]
2019-10-13 21:01 ` Eli Zaretskii
2019-10-13 22:27 ` Ergus
2019-10-14 8:26 ` Eli Zaretskii
2019-10-20 22:20 ` Ergus
2019-10-21 6:38 ` Eli Zaretskii
2019-10-13 19:41 ` Ergus
2019-10-13 16:11 ` Eli Zaretskii
[not found] <318675867.1913640.1567711569517.ref@mail.yahoo.com>
2019-09-05 19:26 ` Ergus
2019-09-06 8:22 ` martin rudalics
2019-09-06 9:31 ` Ergus
2019-09-07 6:52 ` martin rudalics
2019-09-07 7:37 ` Eli Zaretskii
2019-09-07 7:55 ` Eli Zaretskii
2019-09-08 0:51 ` Ergus via Emacs development discussions.
2019-09-08 8:40 ` martin rudalics
2019-09-08 12:53 ` Ergus
2019-09-09 7:39 ` martin rudalics
2019-09-09 13:56 ` Ergus
2019-09-09 16:00 ` Eli Zaretskii
2019-09-09 17:08 ` Ergus
2019-09-09 18:08 ` Eli Zaretskii
2019-09-09 19:29 ` Ergus
2019-09-10 2:27 ` Eli Zaretskii
2019-09-12 3:37 ` Ergus
2019-09-13 8:50 ` Eli Zaretskii
2019-09-08 17:51 ` Eli Zaretskii
2019-09-08 18:23 ` Ergus
2019-09-14 20:42 ` Ergus
2019-09-15 8:25 ` martin rudalics
2019-09-15 11:26 ` Ergus
2019-09-15 12:22 ` martin rudalics
2019-09-15 14:28 ` Stefan Monnier
2019-09-16 9:05 ` martin rudalics
2019-09-15 15:32 ` Eli Zaretskii
2019-09-15 21:42 ` Ergus
2019-09-17 2:17 ` Ergus
2019-09-17 9:48 ` Eli Zaretskii
2019-09-21 8:20 ` Eli Zaretskii
2019-09-21 13:57 ` Ergus
2019-09-21 21:55 ` Ergus
2019-09-26 16:32 ` Ergus
2019-09-28 10:35 ` Eli Zaretskii
2019-09-29 10:30 ` Ergus
2019-09-29 10:57 ` Eli Zaretskii
2019-10-07 15:40 ` Ergus
2019-10-09 9:02 ` Eli Zaretskii
2019-10-12 18:16 ` Ergus
2019-10-12 18:29 ` Eli Zaretskii
2019-09-06 8:55 ` Eli Zaretskii
2019-09-06 10:30 ` Ergus
2019-09-06 13:28 ` Eli Zaretskii
2019-09-06 16:34 ` Ergus
2019-09-06 18:12 ` Eli Zaretskii
2019-09-07 2:35 ` Ergus
2019-09-07 6:41 ` Eli Zaretskii
2019-08-27 16:01 Keith David Bershatsky
-- strict thread matches above, loose matches on Subject: below --
2019-08-07 0:54 Ergus
2019-08-07 15:01 ` Eli Zaretskii
2019-08-07 15:32 ` Ergus
2019-08-07 15:45 ` Eli Zaretskii
2019-08-07 15:57 ` Ergus
2019-08-07 16:12 ` Eli Zaretskii
2019-08-07 16:25 ` martin rudalics
2019-08-07 16:41 ` Eli Zaretskii
2019-08-08 7:25 ` martin rudalics
2019-08-08 8:38 ` Ergus
2019-08-08 8:45 ` martin rudalics
2019-08-08 9:29 ` Ergus
2019-08-08 13:05 ` martin rudalics
2019-08-08 13:59 ` Eli Zaretskii
2019-08-08 16:43 ` Ergus
2019-08-08 17:50 ` Eli Zaretskii
2019-08-08 22:37 ` Ergus
2019-08-09 6:28 ` Eli Zaretskii
2019-08-09 9:08 ` Ergus
2019-08-09 9:40 ` Eli Zaretskii
2019-08-09 11:31 ` Ergus
2019-08-09 14:04 ` Eli Zaretskii
2019-08-09 15:09 ` Ergus
2019-08-09 8:59 ` martin rudalics
2019-08-09 9:31 ` Ergus
2019-08-09 9:38 ` Ergus
2019-08-10 11:42 ` Eli Zaretskii
2019-08-11 8:14 ` martin rudalics
2019-08-09 8:59 ` martin rudalics
2019-08-08 14:50 ` Ergus
2019-08-09 8:59 ` martin rudalics
2019-08-10 11:30 ` Eli Zaretskii
2019-08-11 8:14 ` martin rudalics
2019-08-11 14:13 ` Eli Zaretskii
2019-08-12 8:59 ` martin rudalics
2019-08-12 15:29 ` Eli Zaretskii
2019-08-12 22:18 ` Stefan Monnier
2019-08-13 8:17 ` martin rudalics
2019-08-13 15:32 ` Eli Zaretskii
2019-08-13 22:33 ` Stefan Monnier
2019-08-14 8:58 ` martin rudalics
2019-08-13 8:17 ` martin rudalics
2019-08-13 15:31 ` Eli Zaretskii
2019-08-14 8:58 ` martin rudalics
2019-08-14 15:14 ` Eli Zaretskii
2019-08-15 8:13 ` martin rudalics
2019-08-15 15:18 ` Eli Zaretskii
2019-08-16 7:29 ` martin rudalics
2019-08-16 8:34 ` Eli Zaretskii
2019-08-17 8:25 ` martin rudalics
2019-08-19 16:13 ` Ergus
2019-08-19 16:50 ` Eli Zaretskii
2019-08-19 21:30 ` Ergus
2019-08-20 14:09 ` Eli Zaretskii
2019-08-25 10:22 ` Ergus
2019-08-25 10:44 ` Eli Zaretskii
2019-08-26 4:31 ` Ergus
2019-08-26 7:45 ` Eli Zaretskii
2019-08-26 8:18 ` Ergus
2019-08-26 9:49 ` Eli Zaretskii
2019-08-27 22:20 ` Ergus
2019-08-28 8:35 ` martin rudalics
2019-08-28 9:07 ` Eli Zaretskii
2019-08-28 12:19 ` martin rudalics
2019-08-28 16:31 ` Ergus
2019-08-28 17:24 ` Eli Zaretskii
2019-08-28 18:19 ` Ergus
2019-08-29 18:28 ` Eli Zaretskii
2019-08-30 7:02 ` martin rudalics
2019-08-30 7:26 ` Eli Zaretskii
2019-08-30 9:34 ` Ergus
2019-08-29 7:45 ` martin rudalics
2019-08-28 17:21 ` Eli Zaretskii
2019-08-29 7:45 ` martin rudalics
2019-08-29 18:36 ` Eli Zaretskii
2019-08-30 7:03 ` martin rudalics
2019-08-30 8:48 ` Eli Zaretskii
2019-08-31 7:29 ` martin rudalics
2019-08-31 7:57 ` Eli Zaretskii
2019-09-01 8:14 ` martin rudalics
2019-09-01 12:26 ` Ergus
2019-09-02 8:36 ` martin rudalics
2019-09-02 11:05 ` Ergus
2019-09-02 16:18 ` Eli Zaretskii
2019-09-03 5:33 ` Ergus
2019-09-03 8:45 ` martin rudalics
2019-09-03 11:23 ` Ergus
2019-09-03 12:17 ` martin rudalics
2019-09-03 14:56 ` Eli Zaretskii
2019-09-03 5:35 ` Ergus via Emacs development discussions.
2019-09-03 8:45 ` martin rudalics
2019-09-03 14:53 ` Eli Zaretskii
2019-09-03 16:41 ` martin rudalics
2019-09-03 17:31 ` Eli Zaretskii
2019-09-03 18:59 ` martin rudalics
2019-09-04 18:33 ` Ergus
2019-09-04 20:04 ` martin rudalics
2019-09-04 20:19 ` Ergus via Emacs development discussions.
2019-09-05 7:32 ` martin rudalics
2019-09-05 13:54 ` Ergus
2019-09-05 19:31 ` Ergus
[not found] ` <1826922767.1725310.1567682307734@mail.yahoo.com>
2019-09-05 11:18 ` Ergus
2019-08-21 7:37 ` martin rudalics
2019-08-08 17:37 ` Eli Zaretskii
2019-08-09 12:46 ` martin rudalics
2019-08-10 11:25 ` Eli Zaretskii
2019-08-10 23:04 ` Stefan Monnier
2019-08-11 2:43 ` Eli Zaretskii
2019-08-11 8:17 ` martin rudalics
2019-08-11 8:11 ` martin rudalics
2019-08-08 17:38 ` Eli Zaretskii
2019-08-08 8:15 ` Ergus
2019-08-08 8:45 ` martin rudalics
2019-08-08 9:17 ` Ergus
2019-08-08 17:35 ` Eli Zaretskii
2019-08-08 20:37 ` Juri Linkov
2019-08-08 22:24 ` Ergus
2019-08-09 6:42 ` Eli Zaretskii
2019-08-09 17:54 ` Juri Linkov
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