This is a known issue, libglvnd Breaks/Replaces on mesa need to be
bumped due to dev headers that moved to libglvnd from mesa
that said, you had mesa from bionic-proposed before the upgrade, and
that's not supported
** Also affects: libglvnd (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: libglvnd (Ubuntu Focal)
Status: New => Triaged
** Changed in: libglvnd (Ubuntu Focal)
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
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which is subscribed to libglvnd in Ubuntu.
https://bugs.launchpad.net/bugs/1880108
Title:
package libgl-dev 1.3.1-1 failed to install/upgrade: 正试图覆盖
/usr/include/GL/gl.h，它同时被包含于软件包 mesa-common-dev:amd64
20.0.4-2ubuntu1~18.04.1
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