example crash in ios device

[Gallon]

when i debug the app in xcode ,it runs well,but when I disconnected the deviece, the app must crash.

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Codes: 0x0000000000000001, 0x0000000000000000
VM Region Info: 0 is not in any region. Bytes before following region: 4329357312
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 1020cc000-102b50000 [ 10.5M] r-x/r-x SM=COW ...er.app/Runner
Termination Reason: SIGNAL 11 Segmentation fault: 11
Terminating Process: exc handler [2817]

Triggered by Thread: 0

Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libswiftCore.dylib 0x1a6774a6c swift_getObjectType + 36
1 Runner 0x102568264 SwiftFlutterPlugin.init(with:) + 1040
2 Runner 0x102567e44 SwiftFlutterPlugin.__allocating_init(with:) + 40
3 Runner 0x102568798 static SwiftFlutterPlugin.register(with:) + 64
4 Runner 0x1025687e4 @objc static SwiftFlutterPlugin.register(with:) + 56
5 Runner 0x102441a58 +[InAppWebViewFlutterPlugin registerWithRegistrar:] + 72
6 Runner 0x1020d00b8 +[GeneratedPluginRegistrant registerWithRegistry:] + 184
7 Runner 0x1020d0428 AppDelegate.application(:didFinishLaunchingWithOptions:) + 96
8 Runner 0x1020d0718 @objc AppDelegate.application(:didFinishLaunchingWithOptions:) + 196
9 UIKitCore 0x1ae830740 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 296
10 UIKitCore 0x1ae82fe98 -[UIApplication _callInitializationDelegatesWithActions:forCanvas:payload:fromOriginatingProcess:] + 2776
11 UIKitCore 0x1ae82eecc -[UIApplication _runWithMainScene:transitionContext:completion:] + 852
12 UIKitCore 0x1ae82eb2c -[_UISceneLifecycleMultiplexer completeApplicationLaunchWithFBSScene:transitionContext:] + 128
13 UIKitCore 0x1ae597cf4 _UIScenePerformActionsWithLifecycleActionMask + 96