"The getter 'month' was called on null" on some searches in 20210202t151000

[jonasfj]

pub: Request handler failed

Error:
    NoSuchMethodError: The getter 'month' was called on null.
    Receiver: null
    Tried calling: month

Stack:
    dart:core-patch/object_patch.dart 51:5                        Object.noSuchMethod
    package:intl/src/intl/date_format_field.dart 453:41           _DateFormatPatternField.formatMonth
    package:intl/src/intl/date_format_field.dart 367:16           _DateFormatPatternField.formatField
    package:intl/src/intl/date_format_field.dart 244:12           _DateFormatPatternField.format
    package:intl/src/intl/date_format.dart 276:26                 DateFormat.format
    package:pub_dev/frontend/templates/listing.dart 80:40         renderPackageList
    package:pub_dev/frontend/templates/listing.dart 161:26        renderPkgIndexPage
    package:pub_dev/frontend/handlers/listing.dart 93:5           _packagesHandlerHtmlCore
    package:pub_dev/frontend/handlers/listing.dart 31:5           packagesHandlerHtml
    package:pub_dev/frontend/handlers/routes.dart 65:49           PubSiteService.packages
    package:shelf_router/src/router_entry.dart 104:30             RouterEntry.invoke.<fn>
    package:shelf_router/src/router_entry.dart 110:7              RouterEntry.invoke
    package:shelf_router/src/router.dart 152:31                   Router.call
    package:pub_dev/frontend/handlers.dart 67:37                  createAppHandler.<fn>
    package:pub_dev/shared/handler_helpers.dart 84:29             _redirectLoopDetectorWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 156:29            _cspHeaderWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 257:27            _userAuthWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 148:25            _requestContextWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 281:38            _userSessionWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart                   _userSessionWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 303:38            _httpsWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 239:25            _sanitizeRequestWrapper.<fn>
    package:pub_dev/shared/handler_helpers.dart 180:27            _logRequestWrapper.<fn>