Flutter app crashed after local_auth

[chunghei0116]

Recently working on the face id feature, i would like to trigger the oauth2helper after user passed the biometric login.

Got this error. After investigating, it seems the flutter_web_auth_2 got a bug on iOS device
` warning: flutter_web_auth_2 was compiled with optimization - stepping may behave oddly; variables may not be available.

• thread Flutter Web and openid? #1, queue = 'com.apple.main-thread', stop reason = Swift runtime failure: Unexpectedly found nil while unwrapping an Optional value
  frame Flutter Web and openid? #1: 0x00000001032d86d8 flutter_web_auth_2closure #1 in SwiftFlutterWebAuth2Plugin.handle(url=nil, err=(error = 0x0000000280bf8750), self=0x00000002805ce9e0, sessionToKeepAlive=nil, result=0x00000001032da6e8 flutter_web_auth_2partial apply forwarder for reabstraction thunk helper from @escaping @callee_unowned @convention(block) (@unowned Swift.Optional<Swift.AnyObject>) -> () to @escaping @callee_guaranteed (@in_guaranteed Swift.Optional) -> () at ) at SwiftFlutterWebAuth2Plugin.swift:29:22 [opt]

  `

[CesarRN]

Same issue:

Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 flutter_web_auth_2 0x1055850f4 closure #1 in SwiftFlutterWebAuth2Plugin.handle(_:result:) + 1312
1 flutter_web_auth_2 0x10558559c thunk for @escaping @callee_guaranteed (@in_guaranteed URL?, @guaranteed Error?) -> () + 192
2 AuthenticationServices 0x21d49f554 -[ASWebAuthenticationSession cancelWithError:] + 40
3 AuthenticationServices 0x21d49f3d8 -[ASWebAuthenticationSession startDryRun:] + 644
4 flutter_web_auth_2 0x105586c0c specialized SwiftFlutterWebAuth2Plugin.handle(:result:) + 3048
5 flutter_web_auth_2 0x10558514c @objc SwiftFlutterWebAuth2Plugin.handle(:result:) + 84
6 Flutter 0x105e4191c 0x105860000 + 6166812
7 Flutter 0x1058a3a44 0x105860000 + 277060
8 libdispatch.dylib 0x1ac45d13c _dispatch_call_block_and_release + 32
9 libdispatch.dylib 0x1ac45edd4 _dispatch_client_callout + 20
10 libdispatch.dylib 0x1ac46d5a4 _dispatch_main_queue_drain + 988
11 libdispatch.dylib 0x1ac46d1b8 _dispatch_main_queue_callback_4CF + 44
12 CoreFoundation 0x1a458b710 CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 16
13 CoreFoundation 0x1a4588914 __CFRunLoopRun + 1996
14 CoreFoundation 0x1a4587cd8 CFRunLoopRunSpecific + 608
15 GraphicsServices 0x1e8fd51a8 GSEventRunModal + 164
16 UIKitCore 0x1a6bc1ae8 -[UIApplication _run] + 888
17 UIKitCore 0x1a6c75d98 UIApplicationMain + 340
18 Home Komfort 0x102e708dc 0x102e68000 + 35036
19 dyld 0x1c7d5f154 start + 2356

Any idea?