Comment 11 for bug 1776499

Before using libegl-mesa0 from bionic-proposed:
$ apt-cache policy libegl-mesa0
libegl-mesa0:
  Installed: 18.0.5-0ubuntu0~18.04.1
  Candidate: 18.0.5-0ubuntu0~18.04.1
  Version table:
 *** 18.0.5-0ubuntu0~18.04.1 100
        100 /var/lib/dpkg/status
$ cat main.c
main()
{
   eglGetProcAddress("egl148546488546404");
}
$ gcc main.c -lEGL
$ ./a.out
Segmentation fault (core dumped)

After upgrading libegl-mesa0 to bionic-proposed:
$ apt-cache policy libegl-mesa0
libegl-mesa0:
  Installed: 18.2.2-0ubuntu1~18.04.1
  Candidate: 18.2.2-0ubuntu1~18.04.1
  Version table:
 *** 18.2.2-0ubuntu1~18.04.1 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic-proposed/main arm64 Packages
        100 /var/lib/dpkg/status
     18.0.5-0ubuntu0~18.04.1 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic-updates/main arm64 Packages
     18.0.0~rc5-1ubuntu1 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic/main arm64 Packages
$ ./a.out
No crash

So I can confirm that the issues is fixed in bionic-proposed.