PyGI overrides use 'async' as an identifier, which is not allowed in Python 3.7
Python 3.7 cannot load or byte-compile the Ide.py override, because async
is a reserved keyword in Python 3.7+:
Setting up gnome-builder (3.28.1-1+b1) ...
File "/usr/lib/python3/dist-packages/gi/overrides/Ide.py", line 44
def DBusMethod(dbus_interface, in_signature=None, out_signature=None, async=False):
^
SyntaxError: invalid syntax
This is Debian bug 903558.