FIX: Gracefully handle Ergast date parse errors (#546)

Fixes #545, #547

(cherry picked from commit dd33132)

fastf1/ergast/structure.py

@@ -17,10 +17,15 @@
 # matches [hh:][mm:]ss[.micros][Z | +-hh:mm] timestring
 
 
-def date_from_ergast(d_str) -> datetime.datetime:
+def date_from_ergast(d_str) -> Optional[datetime.datetime]:
     """Create a ``datetime.datetime`` object from a date stamp formatted
     like 'YYYY-MM-DD'."""
-    return datetime.datetime.strptime(d_str, "%Y-%m-%d")
+    try:
+        return datetime.datetime.strptime(d_str, "%Y-%m-%d")
+    except ValueError:
+        logger.debug(f"Failed to parse date stamp '{d_str}' in Ergast"
+                     f"response.")
+        return None
 
 
 def time_from_ergast(t_str) -> Optional[datetime.time]:

fastf1/tests/test_ergast.py

@@ -27,6 +27,19 @@ def test_date_from_ergast():
     assert date_from_ergast('2022-10-25') == datetime.datetime(2022, 10, 25)
 
 
+@pytest.mark.parametrize(
+    "date_string",
+    (
+        "",
+        "huh?"
+    )
+)
+def test_date_from_ergast_errors(date_string, caplog):
+    caplog.set_level(logging.DEBUG)
+    assert date_from_ergast(date_string) is None
+    assert "Failed to parse" in caplog.text
+
+
 @pytest.mark.parametrize(
     "time_string, expected",
     (