fix rc and msg if arg parsing throws an exception, fixes #7885

get_args() exception handling before this fix only dealt with
subclasses of "Error", but we have to expect other exceptions
there, too.

In any case, if we have some fatal exception here, we must
terminate with rc 2.

ArgumentTypeError: emit a short error message - usually this is
a user error, invoking borg in a wrong way.

Other exceptions: full info and traceback.

src/borg/archiver/__init__.py

@@ -625,6 +625,17 @@ def main():  # pragma: no cover
                 tb = format_tb(e)
                 print(tb, file=sys.stderr)
             sys.exit(e.exit_code)
+        except argparse.ArgumentTypeError as e:
+            # we might not have logging setup yet, so get out quickly
+            print(str(e), file=sys.stderr)
+            sys.exit(EXIT_ERROR)
+        except Exception:
+            msg = "Local Exception"
+            tb = f"{traceback.format_exc()}\n{sysinfo()}"
+            # we might not have logging setup yet, so get out quickly
+            print(msg, file=sys.stderr)
+            print(tb, file=sys.stderr)
+            sys.exit(EXIT_ERROR)
         try:
             with sig_int:
                 exit_code = archiver.run(args)