🐛 [firebase_auth] [firebase_auth/missing-email] An email address must be provided.

Bug report

Describe the bug

I have a weird error from my crashlytics dashboard telling the following :

This seems to happen only on iOS and MacOS so far.

It is strange because all my users are signed in with a provider (Google or Apple) or with email and password. So there should always be an email available (no Anonymous sign in allowed). Despite this, i do see in my Firebase console this :

So i am not sure if this is a FlutterFire issue or a Firebase issue at this point but i have raised a ticket to Firebase support to understand what is happening here. I am guessing that the error i am reporting now from firebase_auth is linked to this bad behaviour somehow maybe for some of my users.

Steps to reproduce

I have no way to reproduce it unfortunately, it's fortunately quite rare. But i have understood how i got it. Since the user has no email after signed in, the field mailVerified is probably set to False despite the signed in is from Apple or Google. In my code logic, if !mailVerified i try to send an email verification, which leads to this error since there is no email.

Expected behavior

The current User signed in has no email value without being anonymous. I would expect :

The User has an email field not empty after signed in with email / password - Google - Apple.

Flutter doctor

Run flutter doctor and paste the output below:

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``` Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 3.13.4, on macOS 13.5.2 22G91 darwin-x64, locale fr-FR) [✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0) [✓] Xcode - develop for iOS and macOS (Xcode 14.3.1) [✓] Chrome - develop for the web [✓] Android Studio (version 2022.3) [✓] VS Code (version 1.81.1) [✓] Connected device (2 available) [✓] Network resources • No issues found! ```

Flutter dependencies

Run flutter pub deps -- --style=compact and paste the output below:

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``` Dart SDK 3.1.2 Flutter SDK 3.13.4 myappname 2.2.6+21 dependencies: - app_settings 5.0.0 [flutter plugin_platform_interface] - audio_session 0.1.16 [flutter flutter_web_plugins rxdart meta] - audio_waveforms 1.0.4 [flutter] - audioplayers 5.1.0 [audioplayers_android audioplayers_darwin audioplayers_linux audioplayers_platform_interface audioplayers_web audioplayers_windows file flutter http meta path_provider synchronized uuid] - auto_size_text 3.0.0 [flutter] - cached_network_image 3.2.3 [flutter flutter_cache_manager octo_image cached_network_image_platform_interface cached_network_image_web] - collection 1.17.2 - connectivity_plus 4.0.2 [flutter flutter_web_plugins connectivity_plus_platform_interface js meta nm] - crypto 3.0.3 [typed_data] - cupertino_icons 1.0.6 - desktop_drop 0.4.3 [flutter flutter_web_plugins cross_file] - dio 5.3.2 [async http_parser meta path] - edge_detection 1.1.2 [flutter] - extended_image 8.1.1 [extended_image_library flutter meta] - file_selector 0.9.5 [file_selector_android file_selector_ios file_selector_linux file_selector_macos file_selector_platform_interface file_selector_web file_selector_windows flutter] - firebase_analytics 10.4.5 [firebase_analytics_platform_interface firebase_analytics_web firebase_core firebase_core_platform_interface flutter] - firebase_app_check 0.1.5+2 [firebase_app_check_platform_interface firebase_app_check_web firebase_core firebase_core_platform_interface flutter] - firebase_auth 4.9.0 [firebase_auth_platform_interface firebase_auth_web firebase_core firebase_core_platform_interface flutter meta] - firebase_core 2.15.1 [firebase_core_platform_interface firebase_core_web flutter meta] - firebase_crashlytics 3.3.5 [firebase_core firebase_core_platform_interface firebase_crashlytics_platform_interface flutter stack_trace] - firebase_in_app_messaging 0.7.3+5 [firebase_core firebase_core_platform_interface firebase_in_app_messaging_platform_interface flutter meta] - firebase_messaging 14.6.7 [firebase_core firebase_core_platform_interface firebase_messaging_platform_interface firebase_messaging_web flutter meta] - firebase_performance 0.9.2+5 [firebase_core firebase_core_platform_interface firebase_performance_platform_interface firebase_performance_web flutter] - firebase_remote_config 4.2.5 [firebase_core firebase_core_platform_interface firebase_remote_config_platform_interface firebase_remote_config_web flutter] - fl_chart 0.63.0 [equatable flutter] - flutter 0.0.0 [characters collection material_color_utilities meta vector_math web sky_engine] - flutter_app_badger 1.5.0 [flutter] - flutter_calendar_carousel 2.4.2 [intl flutter] - flutter_email_sender 6.0.1 [flutter] - flutter_image_compress 2.0.4 [flutter flutter_image_compress_platform_interface flutter_image_compress_common flutter_image_compress_web] - flutter_localizations 0.0.0 [flutter intl characters clock collection material_color_utilities meta path vector_math web] - flutter_pdfview 1.3.1 [flutter] - flutter_secure_storage 9.0.0 [flutter flutter_secure_storage_linux flutter_secure_storage_macos flutter_secure_storage_platform_interface flutter_secure_storage_web flutter_secure_storage_windows meta] - flutter_staggered_grid_view 0.7.0 [flutter] - flutter_svg 2.0.7 [flutter vector_graphics vector_graphics_codec vector_graphics_compiler] - fluttercontactpicker 4.7.0 [flutter contact_picker_platform_interface contact_picker_web] - gallery_saver 2.3.3 [flutter path_provider http path] - google_mlkit_text_recognition 0.10.0 [flutter google_mlkit_commons] - google_sign_in 6.1.5 [flutter google_sign_in_android google_sign_in_ios google_sign_in_platform_interface google_sign_in_web] - hive_flutter 1.1.0 [flutter hive path_provider path] - http 1.1.0 [async http_parser meta] - image_editor 1.3.0 [flutter image_editor_platform_interface image_editor_common] - image_picker 1.0.4 [flutter image_picker_android image_picker_for_web image_picker_ios image_picker_linux image_picker_macos image_picker_platform_interface image_picker_windows] - in_app_purchase 3.1.10 [flutter in_app_purchase_android in_app_purchase_platform_interface in_app_purchase_storekit] - in_app_review 2.0.6 [flutter in_app_review_platform_interface] - linkify 5.0.0 - local_auth 2.1.7 [flutter local_auth_android local_auth_ios local_auth_platform_interface local_auth_windows] - maps_launcher 2.2.0 [flutter flutter_web_plugins url_launcher] - package_info_plus 4.1.0 [ffi flutter flutter_web_plugins http meta path package_info_plus_platform_interface win32] - path_provider 2.1.1 [flutter path_provider_android path_provider_foundation path_provider_linux path_provider_platform_interface path_provider_windows] - pdf 3.10.4 [archive barcode bidi crypto image meta path_parsing vector_math xml] - permission_handler 10.4.5 [flutter meta permission_handler_android permission_handler_apple permission_handler_windows permission_handler_platform_interface] - printing 5.11.0 [ffi flutter flutter_web_plugins http image js meta pdf plugin_platform_interface] - provider 6.0.5 [collection flutter nested] - pull_to_refresh_flutter3 2.0.1 [flutter] - purchases_flutter 5.6.5 [flutter freezed_annotation json_annotation] - record 4.4.4 [flutter record_platform_interface record_web record_windows record_macos record_linux] - rive 0.11.16 [collection flutter flutter_web_plugins http meta plugin_platform_interface rive_common] - screenshot 2.1.0 [flutter] - share_plus 7.1.0 [cross_file meta mime flutter flutter_web_plugins share_plus_platform_interface file url_launcher_web url_launcher_windows url_launcher_linux url_launcher_platform_interface ffi win32] - shared_preferences 2.2.1 [flutter shared_preferences_android shared_preferences_foundation shared_preferences_linux shared_preferences_platform_interface shared_preferences_web shared_preferences_windows] - sign_in_with_apple 5.0.0 [flutter meta sign_in_with_apple_platform_interface sign_in_with_apple_web] - syncfusion_flutter_datepicker 22.2.12 [flutter intl syncfusion_flutter_core] - url_launcher 6.1.14 [flutter url_launcher_android url_launcher_ios url_launcher_linux url_launcher_macos url_launcher_platform_interface url_launcher_web url_launcher_windows] - uuid 3.0.7 [crypto] - visibility_detector 0.4.0+2 [flutter] dev dependencies: - build_runner 2.4.6 [analyzer args async build build_config build_daemon build_resolvers build_runner_core code_builder collection crypto dart_style frontend_server_client glob graphs http_multi_server io js logging meta mime package_config path pool pub_semver pubspec_parse shelf shelf_web_socket stack_trace stream_transform timing watcher web_socket_channel yaml] - flutter_launcher_icons 0.13.1 [args checked_yaml cli_util image json_annotation path yaml] - flutter_lints 2.0.3 [lints] - flutter_test 0.0.0 [flutter test_api matcher path fake_async clock stack_trace vector_math async boolean_selector characters collection material_color_utilities meta source_span stream_channel string_scanner term_glyph web] - hive_generator 2.0.1 [build source_gen hive analyzer source_helper] transitive dependencies: - _fe_analyzer_shared 64.0.0 [meta] - _flutterfire_internals 1.3.5 [collection firebase_core firebase_core_platform_interface flutter meta] - analyzer 6.2.0 [_fe_analyzer_shared collection convert crypto glob meta package_config path pub_semver source_span watcher yaml] - archive 3.3.8 [crypto path pointycastle] - args 2.4.2 - async 2.11.0 [collection meta] - audioplayers_android 4.0.1 [audioplayers_platform_interface flutter] - audioplayers_darwin 5.0.1 [audioplayers_platform_interface flutter] - audioplayers_linux 3.0.0 [audioplayers_platform_interface flutter] - audioplayers_platform_interface 6.0.0 [flutter meta plugin_platform_interface] - audioplayers_web 4.0.0 [audioplayers_platform_interface flutter flutter_web_plugins js] - audioplayers_windows 3.0.0 [audioplayers_platform_interface flutter] - barcode 2.2.4 [meta qr] - bidi 2.0.7 - boolean_selector 2.1.1 [source_span string_scanner] - build 2.4.1 [analyzer async convert crypto glob logging meta package_config path] - build_config 1.1.1 [checked_yaml json_annotation path pubspec_parse yaml] - build_daemon 4.0.0 [built_collection built_value http_multi_server logging path pool shelf shelf_web_socket stream_transform watcher web_socket_channel] - build_resolvers 2.3.2 [analyzer async build collection convert crypto graphs logging package_config path pool pub_semver stream_transform yaml] - build_runner_core 7.2.10 [async build build_config build_resolvers collection convert crypto glob graphs json_annotation logging meta package_config path pool timing watcher yaml] - built_collection 5.1.1 - built_value 8.6.2 [built_collection collection fixnum meta] - cached_network_image_platform_interface 2.0.0 [flutter flutter_cache_manager] - cached_network_image_web 1.0.2 [flutter flutter_cache_manager cached_network_image_platform_interface] - characters 1.3.0 - checked_yaml 2.0.3 [json_annotation source_span yaml] - cli_util 0.4.0 [meta path] - clock 1.1.1 - code_builder 4.6.0 [built_collection built_value collection matcher meta] - connectivity_plus_platform_interface 1.2.4 [flutter meta plugin_platform_interface] - contact_picker_platform_interface 4.7.0 [flutter meta plugin_platform_interface] - contact_picker_web 4.7.0 [flutter flutter_web_plugins js contact_picker_platform_interface] - convert 3.1.1 [typed_data] - cross_file 0.3.3+5 [js meta] - dart_style 2.3.2 [analyzer args path pub_semver source_span] - dbus 0.7.8 [args ffi meta xml] - equatable 2.0.5 [collection meta] - extended_image_library 3.6.0 [crypto flutter http_client_helper js path path_provider] - fake_async 1.3.1 [clock collection] - ffi 2.1.0 - file 6.1.4 [meta path] - file_selector_android 0.5.0+3 [file_selector_platform_interface flutter plugin_platform_interface] - file_selector_ios 0.5.1+6 [file_selector_platform_interface flutter] - file_selector_linux 0.9.2+1 [cross_file file_selector_platform_interface flutter] - file_selector_macos 0.9.3+2 [cross_file file_selector_platform_interface flutter] - file_selector_platform_interface 2.6.1 [cross_file flutter http plugin_platform_interface] - file_selector_web 0.9.2+1 [file_selector_platform_interface flutter flutter_web_plugins] - file_selector_windows 0.9.3+1 [cross_file file_selector_platform_interface flutter] - firebase_analytics_platform_interface 3.6.5 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_analytics_web 0.5.4+5 [_flutterfire_internals firebase_analytics_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins js] - firebase_app_check_platform_interface 0.0.9+2 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_app_check_web 0.0.11+2 [_flutterfire_internals firebase_app_check_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins js] - firebase_auth_platform_interface 6.18.0 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_auth_web 5.8.0 [firebase_auth_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins http_parser js meta] - firebase_core_platform_interface 4.8.0 [collection flutter flutter_test meta plugin_platform_interface] - firebase_core_web 2.7.0 [firebase_core_platform_interface flutter flutter_web_plugins js meta] - firebase_crashlytics_platform_interface 3.6.5 [_flutterfire_internals collection firebase_core flutter meta plugin_platform_interface] - firebase_in_app_messaging_platform_interface 0.2.4+5 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_messaging_platform_interface 4.5.6 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_messaging_web 3.5.6 [_flutterfire_internals firebase_core firebase_core_web firebase_messaging_platform_interface flutter flutter_web_plugins js meta] - firebase_performance_platform_interface 0.1.4+5 [_flutterfire_internals firebase_core flutter plugin_platform_interface] - firebase_performance_web 0.1.4+5 [_flutterfire_internals firebase_core firebase_core_web firebase_performance_platform_interface flutter flutter_web_plugins js] - firebase_remote_config_platform_interface 1.4.5 [_flutterfire_internals firebase_core flutter meta plugin_platform_interface] - firebase_remote_config_web 1.4.5 [firebase_core firebase_core_web firebase_remote_config_platform_interface flutter flutter_web_plugins js] - fixnum 1.1.0 - flutter_blurhash 0.7.0 [flutter] - flutter_cache_manager 3.3.1 [clock collection file flutter http path path_provider rxdart sqflite uuid] - flutter_image_compress_common 1.0.2 [flutter flutter_image_compress_platform_interface] - flutter_image_compress_platform_interface 1.0.2 [flutter plugin_platform_interface cross_file] - flutter_image_compress_web 0.1.3+1 [flutter flutter_web_plugins flutter_image_compress_platform_interface js] - flutter_plugin_android_lifecycle 2.0.16 [flutter] - flutter_secure_storage_linux 1.2.0 [flutter flutter_secure_storage_platform_interface] - flutter_secure_storage_macos 3.0.1 [flutter flutter_secure_storage_platform_interface] - flutter_secure_storage_platform_interface 1.0.2 [flutter plugin_platform_interface] - flutter_secure_storage_web 1.1.2 [flutter flutter_secure_storage_platform_interface flutter_web_plugins js] - flutter_secure_storage_windows 3.0.0 [ffi flutter flutter_secure_storage_platform_interface path path_provider win32] - flutter_web_plugins 0.0.0 [flutter characters collection material_color_utilities meta vector_math web] - freezed_annotation 2.4.1 [collection json_annotation meta] - frontend_server_client 3.2.0 [async path] - glob 2.1.2 [async collection file path string_scanner] - google_identity_services_web 0.2.1+1 [js meta] - google_mlkit_commons 0.5.0 [flutter] - google_sign_in_android 6.1.19 [flutter google_sign_in_platform_interface] - google_sign_in_ios 5.6.3 [flutter google_sign_in_platform_interface] - google_sign_in_platform_interface 2.4.2 [flutter plugin_platform_interface quiver] - google_sign_in_web 0.12.0+5 [flutter flutter_web_plugins google_identity_services_web google_sign_in_platform_interface http js] - graphs 2.3.1 [collection] - hive 2.2.3 [meta crypto] - http_client_helper 3.0.0 [http] - http_multi_server 3.2.1 [async] - http_parser 4.0.2 [collection source_span string_scanner typed_data] - image 4.0.17 [archive meta xml] - image_editor_common 1.0.1 [flutter image_editor_platform_interface] - image_editor_platform_interface 1.0.1 [flutter platform plugin_platform_interface] - image_picker_android 0.8.7+5 [flutter flutter_plugin_android_lifecycle image_picker_platform_interface] - image_picker_for_web 3.0.1 [flutter flutter_web_plugins image_picker_platform_interface mime] - image_picker_ios 0.8.8+2 [flutter image_picker_platform_interface] - image_picker_linux 0.2.1+1 [file_selector_linux file_selector_platform_interface flutter image_picker_platform_interface] - image_picker_macos 0.2.1+1 [file_selector_macos file_selector_platform_interface flutter image_picker_platform_interface] - image_picker_platform_interface 2.9.1 [cross_file flutter http plugin_platform_interface] - image_picker_windows 0.2.1+1 [file_selector_platform_interface file_selector_windows flutter image_picker_platform_interface] - in_app_purchase_android 0.3.0+13 [collection flutter in_app_purchase_platform_interface json_annotation] - in_app_purchase_platform_interface 1.3.5 [flutter plugin_platform_interface] - in_app_purchase_storekit 0.3.6+7 [collection flutter in_app_purchase_platform_interface json_annotation] - in_app_review_platform_interface 2.0.4 [flutter url_launcher plugin_platform_interface platform] - intl 0.18.1 [clock meta path] - io 1.0.4 [meta path string_scanner] - js 0.6.7 [meta] - json_annotation 4.8.1 [meta] - lints 2.1.1 - local_auth_android 1.0.34 [flutter flutter_plugin_android_lifecycle intl local_auth_platform_interface] - local_auth_ios 1.1.4 [flutter intl local_auth_platform_interface] - local_auth_platform_interface 1.0.8 [flutter plugin_platform_interface] - local_auth_windows 1.0.10 [flutter local_auth_platform_interface] - logging 1.2.0 - matcher 0.12.16 [async meta stack_trace term_glyph test_api] - material_color_utilities 0.5.0 [collection] - meta 1.9.1 - mime 1.0.4 - nested 1.0.0 [flutter] - nm 0.5.0 [dbus] - octo_image 1.0.2 [flutter flutter_blurhash] - package_config 2.1.0 [path] - package_info_plus_platform_interface 2.0.1 [flutter meta plugin_platform_interface] - path 1.8.3 - path_parsing 1.0.1 [vector_math meta] - path_provider_android 2.2.0 [flutter path_provider_platform_interface] - path_provider_foundation 2.3.1 [flutter path_provider_platform_interface] - path_provider_linux 2.2.1 [ffi flutter path path_provider_platform_interface xdg_directories] - path_provider_platform_interface 2.1.1 [flutter platform plugin_platform_interface] - path_provider_windows 2.2.1 [ffi flutter path path_provider_platform_interface win32] - permission_handler_android 10.3.6 [flutter permission_handler_platform_interface] - permission_handler_apple 9.1.4 [flutter permission_handler_platform_interface] - permission_handler_platform_interface 3.11.5 [flutter meta plugin_platform_interface] - permission_handler_windows 0.1.3 [flutter permission_handler_platform_interface] - petitparser 5.4.0 [meta] - platform 3.1.2 - plugin_platform_interface 2.1.6 [meta] - pointycastle 3.7.3 [collection convert js] - pool 1.5.1 [async stack_trace] - pub_semver 2.1.4 [collection meta] - pubspec_parse 1.2.3 [checked_yaml collection json_annotation pub_semver yaml] - qr 3.0.1 [meta] - quiver 3.2.1 [matcher] - record_linux 0.4.1 [flutter record_platform_interface path] - record_macos 0.2.2 [flutter record_platform_interface] - record_platform_interface 0.5.0 [flutter plugin_platform_interface] - record_web 0.5.0 [flutter flutter_web_plugins record_platform_interface] - record_windows 0.7.1 [flutter record_platform_interface path] - rive_common 0.2.7 [collection ffi flutter flutter_web_plugins graphs http meta plugin_platform_interface] - rxdart 0.27.7 - share_plus_platform_interface 3.3.0 [cross_file flutter meta mime plugin_platform_interface path_provider uuid] - shared_preferences_android 2.2.1 [flutter shared_preferences_platform_interface] - shared_preferences_foundation 2.3.4 [flutter shared_preferences_platform_interface] - shared_preferences_linux 2.3.1 [file flutter path path_provider_linux path_provider_platform_interface shared_preferences_platform_interface] - shared_preferences_platform_interface 2.3.1 [flutter plugin_platform_interface] - shared_preferences_web 2.2.1 [flutter flutter_web_plugins shared_preferences_platform_interface] - shared_preferences_windows 2.3.1 [file flutter path path_provider_platform_interface path_provider_windows shared_preferences_platform_interface] - shelf 1.4.1 [async collection http_parser path stack_trace stream_channel] - shelf_web_socket 1.0.4 [shelf stream_channel web_socket_channel] - sign_in_with_apple_platform_interface 1.0.0 [flutter plugin_platform_interface meta] - sign_in_with_apple_web 1.0.1 [flutter flutter_web_plugins sign_in_with_apple_platform_interface js] - sky_engine 0.0.99 - source_gen 1.4.0 [analyzer async build dart_style glob path source_span yaml] - source_helper 1.3.4 [analyzer collection source_gen] - source_span 1.10.0 [collection path term_glyph] - sqflite 2.3.0 [flutter sqflite_common path] - sqflite_common 2.5.0 [synchronized path meta] - stack_trace 1.11.0 [path] - stream_channel 2.1.1 [async] - stream_transform 2.1.0 - string_scanner 1.2.0 [source_span] - syncfusion_flutter_core 22.2.12 [vector_math flutter] - synchronized 3.1.0 - term_glyph 1.2.1 - test_api 0.6.0 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph] - timing 1.0.1 [json_annotation] - typed_data 1.3.2 [collection] - url_launcher_android 6.1.0 [flutter url_launcher_platform_interface] - url_launcher_ios 6.1.5 [flutter url_launcher_platform_interface] - url_launcher_linux 3.0.6 [flutter url_launcher_platform_interface] - url_launcher_macos 3.0.7 [flutter url_launcher_platform_interface] - url_launcher_platform_interface 2.1.5 [flutter plugin_platform_interface] - url_launcher_web 2.0.20 [flutter flutter_web_plugins url_launcher_platform_interface] - url_launcher_windows 3.0.8 [flutter url_launcher_platform_interface] - vector_graphics 1.1.7 [flutter vector_graphics_codec] - vector_graphics_codec 1.1.7 - vector_graphics_compiler 1.1.7 [args meta path_parsing xml vector_graphics_codec] - vector_math 2.1.4 - watcher 1.1.0 [async path] - web 0.1.4-beta - web_socket_channel 2.4.0 [async crypto stream_channel] - win32 5.0.7 [ffi] - xdg_directories 1.0.3 [meta path] - xml 6.3.0 [collection meta petitparser] - yaml 3.1.2 [collection source_span string_scanner] ```

firebase / flutterfire