Bug#962814: /usr/bin/glxgears: glxgears crashes with segmentation fault

[Aleksei Gorelov <algor512@gmail.com>]

Package: mesa-utils
Version: 8.4.0-1+b1
Severity: important
File: /usr/bin/glxgears

Dear Maintainer,

After last update glxgears begun to crash with segmentation fault error:
$ glxgears
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
Segmentation fault

I also have segfaults when trying to start other software which uses GPUs (for example mpv).
I suppose that the latest update of mesa to the version 20.0.7-1 might be the reason of this.

My GPU is:
00:02.0 VGA compatible controller: Intel Corporation Skylake GT2 [HD Graphics 520] (rev 07) (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] Skylake GT2 [HD Graphics 520]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 128
        Region 0: Memory at b0000000 (64-bit, non-prefetchable) [size=16M]
        Region 2: Memory at a0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 4000 [size=64]
        Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915


-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.6.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8), LANGUAGE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages mesa-utils depends on:
ii  libc6                   2.30-8
ii  libgl1                  1.3.1-1
ii  libglew2.1              2.1.0-4+b1
ii  libglu1-mesa [libglu1]  9.0.1-1
ii  libx11-6                2:1.6.9-2+b1
ii  libxext6                2:1.3.3-1+b2

mesa-utils recommends no packages.

mesa-utils suggests no packages.

-- no debconf information