When searching for fonts, thumbnail dispaly mode will crash Blender #62887

New Issue

Colin · 2019-03-24T00:04:51+01:00

Colin commented

2019-03-24 00:04:51 +01:00

System Information
Operating system: Windows 10
Graphics card: NVIDIA GeForce GTX 1060 3GB

Blender Version
Broken: Version 2.80 Beta, Data: 2019-03-23 01:29 Hash: 045a615f9a, Branch: blender2.7 (Mac and Windows)
Worked: Version 2.79b, Date: 2018-03-22 14:10, Hash: f4dc9f968b

In 2.8, when trying to browse in my font folder in the thumbnail display mode, it immediately crashes. I tried this on both my Windows and Mac machines. It will work in 2.79b so I don't believe it's my computer but a bug in the build.

I'm not sure if a .blend file is required but I attached one. To recreate this, select the text, in the Properties tab, select the Object Data panel, in the Font category, try to choose a font for any of the font styles, and when browsing your files, change the display mode to thumbnail. Chances are, it's going to crash.

Text Thumbnail.blend

**System Information** Operating system: Windows 10 Graphics card: NVIDIA GeForce GTX 1060 3GB **Blender Version** Broken: Version 2.80 Beta, Data: 2019-03-23 01:29 Hash: 045a615f9a4c, Branch: blender2.7 (Mac and Windows) Worked: Version 2.79b, Date: 2018-03-22 14:10, Hash: f4dc9f968b In 2.8, when trying to browse in my font folder in the thumbnail display mode, it immediately crashes. I tried this on both my Windows and Mac machines. It will work in 2.79b so I don't believe it's my computer but a bug in the build. I'm not sure if a .blend file is required but I attached one. To recreate this, select the text, in the Properties tab, select the Object Data panel, in the Font category, try to choose a font for any of the font styles, and when browsing your files, change the display mode to thumbnail. Chances are, it's going to crash. [Text Thumbnail.blend](https://archive.blender.org/developer/F6872941/Text_Thumbnail.blend)

Colin commented

2019-03-24 00:04:51 +01:00

Added subscriber: @ColinStein

Bastien Montagne commented

2019-03-24 14:45:27 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2019-03-24 14:45:27 +01:00

Cannot confirm that here on linux…

Jacques Lucke commented

2019-03-25 13:44:16 +01:00

Added subscribers: @LazyDodo, @JacquesLucke

Jacques Lucke commented

2019-03-25 13:44:16 +01:00

Also cannot reproduce here on Ubuntu 18.04.

Maybe a windows issue. @LazyDodo

Also cannot reproduce here on Ubuntu 18.04. Maybe a windows issue. @LazyDodo

Sebastian Parborg commented

2019-03-25 13:52:18 +01:00

Added subscribers: @WilliamReynish, @ZedDB

Sebastian Parborg commented

2019-03-25 13:52:18 +01:00

I can't reproduce this either (linux).

@WilliamReynish can you reproduce this?

I can't reproduce this either (linux). @WilliamReynish can you reproduce this?

Ray molenkamp commented

2019-03-25 14:56:20 +01:00

I can't reproduce on windows either, however if i had to guess, I'd go with @ColinStein may have a corrupted font file that freetype chokes on while rendering the preview? Can you narrow the issue down to one specific font file @ColinStein?

Colin commented

2019-03-25 15:23:32 +01:00

In #62887#647718, @LazyDodo wrote:
I can't reproduce on windows either, however if i had to guess, I'd go with @ColinStein may have a corrupted font file that freetype chokes on while rendering the preview? Can you narrow the issue down to one specific font file @ColinStein?

Looks like that could be the answer. I took a font and put it in it's own folder and thumbnail display does work. I'm guessing I have a corrupt font in my font folder. Now... How do I do about figuring out which of the 919 fonts is the bad one?!

Well I guess we figured it out. Should I delete this thread or label it to something?

> In #62887#647718, @LazyDodo wrote: > I can't reproduce on windows either, however if i had to guess, I'd go with @ColinStein may have a corrupted font file that freetype chokes on while rendering the preview? Can you narrow the issue down to one specific font file @ColinStein? Looks like that could be the answer. I took a font and put it in it's own folder and thumbnail display does work. I'm guessing I have a corrupt font in my font folder. Now... How do I do about figuring out which of the 919 fonts is the bad one?! Well I guess we figured it out. Should I delete this thread or label it to something?

Sebastian Parborg commented

2019-03-25 16:16:03 +01:00

To make sure that the issue isn't on our end, you could try to hunt down the file that causes this issue and give it to us so we can reproduce.

Ray molenkamp commented

2019-03-25 16:22:51 +01:00

Even if the issue is on not on our end, i'd rather look into making blender not crash rather than telling the users 'it's your fault for having a corrupt font'

Fastest way to find the misbehaving font? binary search! make 2 font new font folders, copy about 450 of them to the first one, and the rest to the second one, see which one crashes, make 2 new folders, copy half of the crashing folder to each, repeat until you have only a single font left. should be do-able under 10 steps

Even if the issue is on not on our end, i'd rather look into making blender not crash rather than telling the users 'it's your fault for having a corrupt font' Fastest way to find the misbehaving font? binary search! make 2 font new font folders, copy about 450 of them to the first one, and the rest to the second one, see which one crashes, make 2 new folders, copy half of the crashing folder to each, repeat until you have only a single font left. should be do-able under 10 steps

Colin commented

2019-03-25 18:08:25 +01:00

In #62887#647800, @LazyDodo wrote:
Even if the issue is on not on our end, i'd rather look into making blender not crash rather than telling the users 'it's your fault for having a corrupt font'

Fastest way to find the misbehaving font? binary search! make 2 font new font folders, copy about 450 of them to the first one, and the rest to the second one, see which one crashes, make 2 new folders, copy half of the crashing folder to each, repeat until you have only a single font left. should be do-able under 10 steps

Smart idea. So I did that and sure enough, it was in the As so not too much work. Turns out, it's an emjoi font, which obviously makes sense. Now I can't trust my Mac font folder! So if you're anything like me and you work on 2 machines, don't just copy all the Mac fonts to your Windows machine.

"Apple Color Emoji.ttf" Apple Color Emoji.ttf

> In #62887#647800, @LazyDodo wrote: > Even if the issue is on not on our end, i'd rather look into making blender not crash rather than telling the users 'it's your fault for having a corrupt font' > > Fastest way to find the misbehaving font? binary search! make 2 font new font folders, copy about 450 of them to the first one, and the rest to the second one, see which one crashes, make 2 new folders, copy half of the crashing folder to each, repeat until you have only a single font left. should be do-able under 10 steps Smart idea. So I did that and sure enough, it was in the As so not too much work. Turns out, it's an emjoi font, which obviously makes sense. Now I can't trust my Mac font folder! So if you're anything like me and you work on 2 machines, don't just copy all the Mac fonts to your Windows machine. "Apple Color Emoji.ttf" [Apple Color Emoji.ttf](https://archive.blender.org/developer/F6881776/Apple_Color_Emoji.ttf)

Jacques Lucke was assigned by Sebastian Parborg

2019-03-25 18:15:04 +01:00

Sebastian Parborg commented

2019-03-25 18:15:04 +01:00

Ok, this is on our end:

Backtrace:

Thread 28 "blender" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd4ffb700 (LWP 25631)]
0x0000555558a941dd in blf_kerning_cache_new (font=0x7fffd2670008)
    at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_glyph.c:96
96				if (FT_Get_Kerning(font->face, g_prev->idx, g->idx, kc->mode, &delta) == 0) {
(gdb) bt
#0  0x0000555558a941dd in blf_kerning_cache_new (font=0x7fffd2670008)
    at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_glyph.c:96
#1  0x0000555558a90da7 in blf_font_ensure_ascii_kerning (font=0x7fffd2670008, kern_mode=0)
    at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_font.c:287
#2  0x0000555558a9165e in blf_font_draw_buffer_ex (font=0x7fffd2670008, str=0x55555c2483e8 "AaBbCc", len=6, r_info=0x0, pen_y=0)
    at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_font.c:511
#3  0x0000555558a92097 in blf_font_draw_buffer (font=0x7fffd2670008, str=0x55555c2483e8 "AaBbCc", len=6, r_info=0x0)
    at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_font.c:636
#4  0x0000555558a961e8 in BLF_thumb_preview (filename=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", draw_str=0x55555db2d5a0 <thumb_str>,
    draw_str_lines=5 '\005', font_color=0x7fffd4ff62e0, font_size=64, buf=0x7fffd261ff88 "\377\377\377", w=256, h=256, channels=4)
    at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_thumbs.c:116
#5  0x000055555863d08b in IMB_thumb_load_font (filename=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", x=256, y=256)
    at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs_font.c:64
#6  0x000055555863b82e in thumb_create_ex (file_path=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf",
    uri=0x7fffd4ff8740 "file:///tmp/bugs/Apple%20Color%20Emoji.ttf", thumb=0x7fffd4ff7e90 "8779bce0cf0babf4426aa66f5d281070.png", use_hash=true,
    hash=0x7fffd4ff7ec0 "d348439dc375be8ea2d9691277f7d074", blen_group=0x0, blen_id=0x0, size=THB_LARGE, source=THB_SOURCE_FONT, img=0x0)
    at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs.c:370
#7  0x000055555863bde0 in thumb_create_or_fail (file_path=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf",
    uri=0x7fffd4ff8740 "file:///tmp/bugs/Apple%20Color%20Emoji.ttf", thumb=0x7fffd4ff7e90 "8779bce0cf0babf4426aa66f5d281070.png", use_hash=true,
    hash=0x7fffd4ff7ec0 "d348439dc375be8ea2d9691277f7d074", blen_group=0x0, blen_id=0x0, size=THB_LARGE, source=THB_SOURCE_FONT)
    at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs.c:463
#8  0x000055555863c556 in IMB_thumb_manage (org_path=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", size=THB_LARGE, source=THB_SOURCE_FONT)
    at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs.c:620
#9  0x00005555572b1b2e in filelist_cache_preview_runf (pool=0x7fffd0c452c8, taskdata=0x7fffe665e108, UNUSED_threadid=5)
    at /home/zed/programmering/blender_master/blender/source/blender/editors/space_file/filelist.c:1116
#10 0x00005555586d1ef0 in task_scheduler_thread_run (thread_p=0x7fffda1efb78)
    at /home/zed/programmering/blender_master/blender/source/blender/blenlib/intern/task.c:439
- 11 0x00007ffff65763c3 in start_thread () from /lib64/libpthread.so.0
- 12 0x00007ffff27123ef in clone () from /lib64/libc.so.

@JacquesLucke feel free to reassign if this is not for you.

Ok, this is on our end: Backtrace: ``` Thread 28 "blender" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffd4ffb700 (LWP 25631)] 0x0000555558a941dd in blf_kerning_cache_new (font=0x7fffd2670008) at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_glyph.c:96 96 if (FT_Get_Kerning(font->face, g_prev->idx, g->idx, kc->mode, &delta) == 0) { (gdb) bt #0 0x0000555558a941dd in blf_kerning_cache_new (font=0x7fffd2670008) at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_glyph.c:96 #1 0x0000555558a90da7 in blf_font_ensure_ascii_kerning (font=0x7fffd2670008, kern_mode=0) at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_font.c:287 #2 0x0000555558a9165e in blf_font_draw_buffer_ex (font=0x7fffd2670008, str=0x55555c2483e8 "AaBbCc", len=6, r_info=0x0, pen_y=0) at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_font.c:511 #3 0x0000555558a92097 in blf_font_draw_buffer (font=0x7fffd2670008, str=0x55555c2483e8 "AaBbCc", len=6, r_info=0x0) at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_font.c:636 #4 0x0000555558a961e8 in BLF_thumb_preview (filename=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", draw_str=0x55555db2d5a0 <thumb_str>, draw_str_lines=5 '\005', font_color=0x7fffd4ff62e0, font_size=64, buf=0x7fffd261ff88 "\377\377\377", w=256, h=256, channels=4) at /home/zed/programmering/blender_master/blender/source/blender/blenfont/intern/blf_thumbs.c:116 #5 0x000055555863d08b in IMB_thumb_load_font (filename=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", x=256, y=256) at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs_font.c:64 #6 0x000055555863b82e in thumb_create_ex (file_path=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", uri=0x7fffd4ff8740 "file:///tmp/bugs/Apple%20Color%20Emoji.ttf", thumb=0x7fffd4ff7e90 "8779bce0cf0babf4426aa66f5d281070.png", use_hash=true, hash=0x7fffd4ff7ec0 "d348439dc375be8ea2d9691277f7d074", blen_group=0x0, blen_id=0x0, size=THB_LARGE, source=THB_SOURCE_FONT, img=0x0) at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs.c:370 #7 0x000055555863bde0 in thumb_create_or_fail (file_path=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", uri=0x7fffd4ff8740 "file:///tmp/bugs/Apple%20Color%20Emoji.ttf", thumb=0x7fffd4ff7e90 "8779bce0cf0babf4426aa66f5d281070.png", use_hash=true, hash=0x7fffd4ff7ec0 "d348439dc375be8ea2d9691277f7d074", blen_group=0x0, blen_id=0x0, size=THB_LARGE, source=THB_SOURCE_FONT) at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs.c:463 #8 0x000055555863c556 in IMB_thumb_manage (org_path=0x7fffe665e108 "/tmp/bugs/Apple Color Emoji.ttf", size=THB_LARGE, source=THB_SOURCE_FONT) at /home/zed/programmering/blender_master/blender/source/blender/imbuf/intern/thumbs.c:620 #9 0x00005555572b1b2e in filelist_cache_preview_runf (pool=0x7fffd0c452c8, taskdata=0x7fffe665e108, UNUSED_threadid=5) at /home/zed/programmering/blender_master/blender/source/blender/editors/space_file/filelist.c:1116 #10 0x00005555586d1ef0 in task_scheduler_thread_run (thread_p=0x7fffda1efb78) at /home/zed/programmering/blender_master/blender/source/blender/blenlib/intern/task.c:439 - 11 0x00007ffff65763c3 in start_thread () from /lib64/libpthread.so.0 - 12 0x00007ffff27123ef in clone () from /lib64/libc.so. ``` @JacquesLucke feel free to reassign if this is not for you.

Jacques Lucke was unassigned by Sebastian Parborg

2019-03-25 18:20:16 +01:00

Sebastian Parborg self-assigned this 2019-03-25 18:20:16 +01:00

Sebastian Parborg commented

2019-03-25 18:20:16 +01:00

nvm, I got it. ;) D4590

nvm, I got it. ;) [D4590](https://archive.blender.org/developer/D4590)

Sebastian Parborg commented

2019-03-25 18:34:21 +01:00

Added subscriber: @brecht

Sebastian Parborg commented

2019-03-25 18:34:21 +01:00

@brecht as @LazyDodo pointed out on IRC, we might want to remove the attachment because of copyright reasons.

Colin commented

2019-03-25 19:12:47 +01:00

Well this was my first time submitting a crash. Should I delete the font? What is all of that backtrace? What do I need to do next?

Jacques Lucke commented

2019-03-25 20:21:43 +01:00

@ColinStein, you can just wait for a moment, until the patch by @ZedDB is reviewed. Maybe the bug on Blender is fixed in one or two days. Otherwise just get rid of the font if you don't need it.

Colin commented

2019-03-25 20:26:09 +01:00

In #62887#647996, @JacquesLucke wrote:
@ColinStein, you can just wait for a moment, until the patch by @ZedDB is reviewed. Maybe the bug on Blender is fixed in one or two days. Otherwise just get rid of the font if you don't need it.

Oh yea, I don't need the font. I was asking what do I do here? I don't want to clutter these forums if it's a non-issue.

> In #62887#647996, @JacquesLucke wrote: > @ColinStein, you can just wait for a moment, until the patch by @ZedDB is reviewed. Maybe the bug on Blender is fixed in one or two days. Otherwise just get rid of the font if you don't need it. Oh yea, I don't need the font. I was asking what do I do here? I don't want to clutter these forums if it's a non-issue.

Ray molenkamp commented

2019-03-25 20:58:20 +01:00

You reported a legit bug that is in the process of getting fixed, you can sit back and wait for the fix to land, once it does the next days buildbot will no longer crash on your font file :)

blender-admin commented

2019-03-26 14:08:42 +01:00

This issue was referenced by b2656a6ee4

This issue was referenced by b2656a6ee4d554fdd6dcf9cc0d9427d1a8307a10

Sebastian Parborg commented

2019-03-26 14:14:09 +01:00

Changed status from 'Open' to: 'Resolved'

Sebastian Parborg closed this issue

2019-03-26 14:14:09 +01:00

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When searching for fonts, thumbnail dispaly mode will crash Blender #62887