Segmentation Fault after loading glamoregl
After a reboot after upgrade Grub stopped processing after loading graphical.target. By switching to tty2 and investigating I realised xorg got segfaulted. I downgraded and it started to work again.
$ awk ' $0 ~ /(xorg|mesa|gdm)/ && $0 ~ /2019-02-/ { print $0 }' /var/log/pacman.log
[2019-02-08 07:13] [ALPM] upgraded mesa (18.3.2-1 -> 18.3.3-2)
[2019-02-23 13:20] [ALPM] upgraded xorg-xrdb (1.1.1-1 -> 1.2.0-1)
[2019-02-23 13:20] [ALPM] upgraded xorg-xhost (1.0.7-2 -> 1.0.8-1)
[2019-02-23 13:20] [ALPM] upgraded libgdm (3.30.2-2 -> 3.30.2+5+g57bf0dd7-1)
[2019-02-23 13:20] [ALPM] upgraded gdm (3.30.2-2 -> 3.30.2+5+g57bf0dd7-1)
[2019-02-23 13:20] [ALPM] upgraded lib32-mesa (18.3.2-1 -> 18.3.3-1)
[2019-02-23 13:21] [ALPM] upgraded xorg-xev (1.2.2-2 -> 1.2.3-1)
[2019-02-23 13:21] [ALPM] upgraded xorg-xlsatoms (1.1.2-2 -> 1.1.3-1)
[2019-02-23 13:21] [ALPM] upgraded xorg-xmodmap (1.0.9-2 -> 1.0.10-1)
[2019-02-23 13:21] [ALPM] upgraded xorg-xvinfo (1.1.3-2 -> 1.1.4-1)
[2019-02-26 10:11] [ALPM] upgraded mesa (18.3.3-2 -> 18.3.4-1)
[2019-02-26 10:11] [ALPM] upgraded lib32-mesa (18.3.3-1 -> 18.3.4-1)
[2019-02-27 16:54] [ALPM] upgraded libgdm (3.30.2+5+g57bf0dd7-1 -> 3.30.3-1)
[2019-02-27 16:54] [ALPM] upgraded gdm (3.30.2+5+g57bf0dd7-1 -> 3.30.3-1)
[2019-02-27 20:39] [PACMAN] Running 'pacman -Sy gdm'
[2019-02-27 20:42] [PACMAN] Running 'pacman -U /var/cache/pacman/pkg/libgdm-3.30.2-2-x86_64.pkg.tar.xz /var/cache/pacman/pkg/gdm-3.30.2-2-x86_64.pkg.tar.xz'
[2019-02-27 20:42] [ALPM] downgraded libgdm (3.30.3-1 -> 3.30.2-2)
[2019-02-27 20:42] [ALPM] downgraded gdm (3.30.3-1 -> 3.30.2-2)
[2019-02-27 22:10] [PACMAN] Running 'pacman -R gdm'
[2019-02-27 22:10] [ALPM] removed gdm (3.30.2-2)
[2019-02-28 06:58] [PACMAN] Running 'pacman -U /var/cache/pacman/pkg/xorg-xrdb-1.1.1-1-x86_64.pkg.tar.xz /var/cache/pacman/pkg/xorg-xhost-1.0.7-2-x86_64.pkg.tar.xz /var/cache/pacman/pkg/xorg-xev-1.2.2-2-x86_64.pkg.tar.xz /var/cache/pacman/pkg/xorg-xlsatoms-1.1.2-2-x86_64.pkg.tar.xz /var/cache/pacman/pkg/xorg-xmodmap-1.0.9-2-x86_64.pkg.tar.xz /var/cache/pacman/pkg/xorg-xvinfo-1.1.3-2-x86_64.pkg.tar.xz'
[2019-02-28 06:58] [ALPM] downgraded xorg-xrdb (1.2.0-1 -> 1.1.1-1)
[2019-02-28 06:58] [ALPM] downgraded xorg-xhost (1.0.8-1 -> 1.0.7-2)
[2019-02-28 06:58] [ALPM] downgraded xorg-xev (1.2.3-1 -> 1.2.2-2)
[2019-02-28 06:58] [ALPM] downgraded xorg-xlsatoms (1.1.3-1 -> 1.1.2-2)
[2019-02-28 06:58] [ALPM] downgraded xorg-xmodmap (1.0.10-1 -> 1.0.9-2)
[2019-02-28 06:58] [ALPM] downgraded xorg-xvinfo (1.1.4-1 -> 1.1.3-2)
[2019-02-28 07:02] [PACMAN] Running 'pacman -U /var/cache/pacman/pkg/lib32-mesa-18.3.2-1-x86_64.pkg.tar.xz /var/cache/pacman/pkg/mesa-18.3.3-2-x86_64.pkg.tar.xz'
[2019-02-28 07:02] [ALPM] downgraded mesa (18.3.4-1 -> 18.3.3-2)
[2019-02-28 07:02] [ALPM] downgraded lib32-mesa (18.3.4-1 -> 18.3.2-1)
[2019-02-28 07:03] [PACMAN] Running 'pacman -S gdm'
[2019-02-28 07:03] [ALPM] installed gdm (3.30.3-1)
[2019-02-28 07:05] [PACMAN] Running 'pacman -U /var/cache/pacman/pkg/libgdm-3.30.2-2-x86_64.pkg.tar.xz /var/cache/pacman/pkg/gdm-3.30.2-2-x86_64.pkg.tar.xz'
[2019-02-28 07:05] [ALPM] reinstalled libgdm (3.30.2-2)
[2019-02-28 07:05] [ALPM] downgraded gdm (3.30.3-1 -> 3.30.2-2)