Bug#898391:

[ciel]

Severity: grave

Hi how is this issue going? I don't understand even why you need to
add conflicts. If you care about glvnd so much, I even think you can
migrate all existing installation to nonglvnd edition. I'm having
segmentation fault on libgtk3 with glvnd edition, so nonglvnd is only
my option.

Anyway I have to update the severity to grave. Please consider to fix
the issue soon.