Comment 1 for bug 1787649

Here's the Traceback:

Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-_he31ans/bionic", line 8, in <module>
    sys.exit(main())
  File "/tmp/ubuntu-release-upgrader-_he31ans/DistUpgrade/DistUpgradeMain.py", line 238, in main
    if app.run():
  File "/tmp/ubuntu-release-upgrader-_he31ans/DistUpgrade/DistUpgradeController.py", line 2017, in run
    return self.fullUpgrade()
  File "/tmp/ubuntu-release-upgrader-_he31ans/DistUpgrade/DistUpgradeController.py", line 1958, in fullUpgrade
    self.cache["libc6"].mark_install()
  File "/usr/lib/python3/dist-packages/apt/package.py", line 1309, in mark_install
    fixer.resolve(True)
SystemError: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.