Crash can be reproduced by simple test application which does e.g. :

The problem is in the search algorithm used in mesa to look for the name
passed to eglGetProcAddress. So crash can reproduce with other names as
well. Please note that this bug will affect even though mesa driver is
actually not getting used. GLVD tries to load drivers from all vendors
listed in "/usr/share/glvnd/egl_vendor.d/". As a work around
"/usr/share/glvnd/egl_vendor.d/50_mesa.json" needs to be removed for
using EGL driver from other vendors e.g. nvidia.

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  Crash in libegl-mesa0 due to out of bound array access

Status in mesa package in Ubuntu:
Status in mesa source package in Bionic:

Bug description:
  Crash in libegl-mesa0 due to out of bound array access. Crash is fixed
  on Mesa master branch with change:
  .This bug is to request to include this change in Mesa upgrades in

  Please let me know if this change needs to be back ported to other
  branch so that libegl-mesa0 upgrade in Bionic could pick this change.

  lsb_release -a
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04 LTS
  Release:        18.04
  Codename:       bionic

  apt-cache policy libegl-mesa0
    Installed: 18.0.0~rc5-1ubuntu1
    Candidate: 18.0.0~rc5-1ubuntu1
    Version table:
   *** 18.0.0~rc5-1ubuntu1 500
          500 bionic/main arm64 Packages
          100 /var/lib/dpkg/status

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