Possible null reference assignment.

Cannot convert null literal to non-nullable reference type.

Possible null reference assignment.

Non-nullable field '_formatter' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field '_values' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Nullability of reference types in type of parameter 'error' of 'string LoggingFilter.MessageFormatter(FormattedLogValues state, Exception error)' doesn't match the target delegate 'Func<FormattedLogValues, Exception?, string>' (possibly because of nullability attributes).

Cannot convert null literal to non-nullable reference type.

Possible null reference assignment.

Cannot convert null literal to non-nullable reference type.