Comment 0 for bug 1780501

I was upgrading from Bionic to Cosmic when I received a conffile prompt regarding /etc/update-initramfs/initramfs.conf, I clicked keep and then saw this Traceback:

Original exception was:
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-filpk342/cosmic", line 8, in <module>
    sys.exit(main())
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeMain.py", line 238, in main
    if app.run():
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeController.py", line 1949, in run
    return self.fullUpgrade()
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeController.py", line 1912, in fullUpgrade
    if not self.doDistUpgrade():
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeController.py", line 1248, in doDistUpgrade
    res = self.cache.commit(fprogress,iprogress)
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeCache.py", line 293, in commit
    apt.Cache.commit(self, fprogress, iprogress)
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 606, in commit
    pm = apt_pkg.PackageManager(self._depcache)
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 569, in install_archives
    # compat with older API
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeView.py", line 229, in run
    res = os.WEXITSTATUS(self.wait_child())
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeViewGtk3.py", line 340, in wait_child
    self.update_interface()
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeViewGtk3.py", line 347, in update_interface
    InstallProgress.update_interface(self)
  File "/usr/lib/python3/dist-packages/apt/progress/base.py", line 252, in update_interface
    if err.errno != errno.EAGAIN and err.errno != errno.EWOULDBLOCK:
  File "/tmp/ubuntu-release-upgrader-filpk342/DistUpgrade/DistUpgradeViewGtk3.py", line 276, in conffile
    self.term.feed_child("n\n", -1)
TypeError: Vte.Terminal.feed_child() takes exactly 2 arguments (3 given)