[Bug 1895360] Re: Terminal (and other default Ubuntu apps) won't launch due to missing libffi.so.7 in 20.10

[Steve Langasek]

> /home/alichtman/.local/lib/python3.8/site-packages/gi/__init__.py

This is not a bug in libffi.  You have a local gi python module on your
path which depends on library versions other than those which are
current in 20.10.

It is inadvisable to put modules on your default python path that shadow
system modules.

** Changed in: libffi (Ubuntu)
       Status: New => Invalid

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Title:
  Terminal (and other default Ubuntu apps) won't launch due to missing
  libffi.so.7 in 20.10

Status in libffi package in Ubuntu:
  Invalid

Bug description:
  When I launch Terminal, I see the following error (st and urxvt are
  still launchable, as are Discord and Spotify, among others):

  Sep 11 18:22:39 arctic systemd[1918]: Started Application launched by gnome-shell.
  Sep 11 18:22:39 arctic gnome-shell[2191]: g_variant_unref: assertion 'value != NULL' failed
  Sep 11 18:22:39 arctic gnome-shell[2191]: g_variant_unref: assertion 'value != NULL' failed
  Sep 11 18:22:39 arctic gnome-shell[18808]: Traceback (most recent call last):
  Sep 11 18:22:39 arctic gnome-shell[18808]:   File "/usr/bin/gnome-terminal", line 9, in <module>
  Sep 11 18:22:39 arctic gnome-shell[18808]:     from gi.repository import GLib, Gio
  Sep 11 18:22:39 arctic gnome-shell[18808]:   File "/home/alichtman/.local/lib/python3.8/site-packages/gi/__init__.py", line 42, in <module>
  Sep 11 18:22:39 arctic gnome-shell[18808]:     from . import _gi
  Sep 11 18:22:39 arctic gnome-shell[18808]: ImportError: libffi.so.7: cannot open shared object file: No such file or directory

  And then Terminal never launches.

  libffi.so.8 is found in /usr/lib/x86_64-linux-gnu/, but libffi.so.7 is
  missing.

  $ lsb_release -rd
  Description:	Ubuntu Groovy Gorilla (development branch)
  Release:	20.10

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