Frequent libpangoft* segfaults while spectating

[ghost]

Dota frequently segfaults while spectating games, with messages such as below spamming the console:

Error in GetKernedCharWidth FT_Load_Glyph of 0x44 / 0x25 in Dota Hypatia Bold (symbol 0): 0x83 Error in GetCharRGBA FT_Load_Glyph of 0x6e / 0x51 in Verdana (symbol 0): 0x86

Also, the minimap option to display heroes as text either doesn't render the text at all or it's missing characters, such as " ga i en" for Naga Siren.

I have the Liberation font installed, but the crash happens with ttf-mscorefonts-installer or no Arial font at all. Currently on Debian Stretch but I've observed the issue in Arch Linux as well.

There's another issue regarding Pango open on here but that one involves Primus, whereas I'm only on the onboard Intel.

Computer Information: Manufacturer: Unknown Model: Unknown Form Factor: Laptop No Touch Input Detected

Processor Information: CPU Vendor: GenuineIntel CPU Brand: Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz CPU Family: 0x6 CPU Model: 0x3a CPU Stepping: 0x9 CPU Type: 0x0 Speed: 2600 Mhz 4 logical processors 2 physical processors HyperThreading: Supported FCMOV: Supported SSE2: Supported SSE3: Supported SSSE3: Supported SSE4a: Unsupported SSE41: Supported SSE42: Supported AES: Supported AVX: Supported CMPXCHG16B: Supported LAHF/SAHF: Supported PrefetchW: Unsupported

Operating System Version: Debian GNU/Linux 9.1 (stretch) (64 bit) Kernel Name: Linux Kernel Version: 4.12.9 X Server Vendor: The X.Org Foundation X Server Release: 11902000 X Window Manager: EXWM Steam Runtime Version: steam-runtime-beta-release_2016-12-05

Video Card: Driver: Intel Open Source Technology Center Mesa DRI Intel(R) Ivybridge Mobile x86/MMX/SSE2 Driver Version: 3.0 Mesa 13.0.6 OpenGL Version: 3.0 Desktop Color Depth: 24 bits per pixel Monitor Refresh Rate: 60 Hz VendorID: 0x8086 DeviceID: 0x166 Revision Not Detected Number of Monitors: 1 Number of Logical Video Cards: 1 Primary Display Resolution: 1366 x 768 Desktop Resolution: 1366 x 768 Primary Display Size: 13.39" x 7.48" (15.31" diag) 34.0cm x 19.0cm (38.9cm diag) Primary VRAM Not Detected

Sound card: Audio device: VIA VT1802

Memory: RAM: 7431 Mb

Miscellaneous: UI Language: English LANG: en_US.UTF-8 Total Hard Disk Space Available: 371666 Mb Largest Free Hard Disk Block: 331341 Mb VR Headset: None detected

Recent Failure Reports:

[gdrewb-valve]

These suggest problems in the font data on your system as they're core Freetype font handling errors. Validate your Dota install, although that may not help. It's also possible this is another manifestation of #922, the known scaleform problems when spectating.

[ghost]

Managed to get a crash that wasn't discarded: Mon Sep 4 21:11:42 2017 GMT: file ''/tmp/dumps/crash_20170904141036_1.dmp'', upload yes: ''CrashID=bp-f7029e1b-6270-484d-b946-332822170904''

I set "+r_sync_scaleform_frame_and_render 1" and disabled the Steam overlay but the issue still persists.

I also tested my system versions of libpango and libfreetype but that didn't do anything except make the fonts bigger. ;)

[gdrewb-valve]

That crash is in libfreetype.so.6.11.1 so it looks like corrupt state that crashes multiple versions of Freetype. It could be your font cache or the fonts themselves but you'd have to check on a Freetype forum to get more info there.

I'd recommend again that you validate your install if you haven't already.

[ghost]

I can't reproduce this anymore.

libfreetype.so.6.12.3

Not sure what fixed it. Upgraded graphics stack to Mesa 18something too.

[gdrewb-valve]

Thanks for the update, I'll go ahead and close this.