I am getting report of a crash occurring, while doing a NFC HCE CardSession.
The swift code is mostly the same as the example from the CardSession docs:
@objc func deviceSupportsNFC (_ call: CAPPluginCall) {
call.keepAlive = true
let supportsNFCCallbackId = call.callbackId!
Task() {
guard NFCReaderSession.readingAvailable,
CardSession.isSupported, // <-- line 86
await CardSession.isEligible else {
print(TAG + " HCE not allowed/available")
var support = JSObject()
support["supported"] = false;
let callback = bridge?.savedCall(withID: supportsNFCCallbackId)
call.resolve();
callback?.resolve(support);
return;
}
print(TAG + " HCE allowed")
var support = JSObject()
support["supported"] = true;
let callback = bridge?.savedCall(withID: supportsNFCCallbackId)
call.resolve();
callback?.resolve(support);
}
}
Calling it from my plugin, to verify if (HCE) NFC is supported:
if(await deviceInfoService.isIos()) {
if(iosSupportEnabled === false) {
console.log("NfcHceService:iOS but disabled");
return;
}
this.requiresManualTrigger = true;
DfsNfcHce.deviceSupportsNFC((supportObj) => {
const support = supportObj?.supported ?? false;
this.hceSupported = support;
});
} else {
this.hceSupported = true;
}
The crash report i get via Crashlytics is below. It's specifying the error occurs at line 86 (marked it in my code above) The error seems to be in the CoreNFC (NFCHardwareManager areFeaturesSupported).
# Crashlytics - Stack trace
# Application: com.wodanbrothers.dyflexis
# Platform: apple
# Version: 2025.04.101356 (1744977392)
# Issue: c3a293fbfa73c64f59f92c4b4cdfeb83
# Session: 5c64465c452c41e3abb1ba9f970b54c0_DNE_0_v2
# Date: Wed May 07 2025 07:56:11 GMT+0200 (Central European Summer Time)
Fatal Exception: NSInvalidArgumentException
0 CoreFoundation 0x11a2ec __exceptionPreprocess
1 libobjc.A.dylib 0x31a7c objc_exception_throw
2 CoreFoundation 0x18467c +[NSObject(NSObject) _copyDescription]
3 CoreFoundation 0x31b84 ___forwarding___
4 CoreFoundation 0x314f0 _CF_forwarding_prep_0
5 CoreNFC 0x2ac40 -[NFCHardwareManager areFeaturesSupported:outError:]
6 CoreNFC 0x2b184 -[NFCHardwareManager areFeaturesSupported:expiry:completion:]
7 CoreNFC 0x2f9d8 block_destroy_helper.5
8 Dyflexis 0x5c08 closure #1 in DfsNfcHcePlugin.deviceSupportsNFC(_:) + 86 (DfsNfcHcePlugin.swift:86)
9 Dyflexis 0x7f8d <deduplicated_symbol>
10 Dyflexis 0x7725 specialized thunk for @escaping @isolated(any) @callee_guaranteed @async () -> (@out A) (<compiler-generated>)
11 Dyflexis 0x77fd <deduplicated_symbol>
12 libswift_Concurrency.dylib 0x65241 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError
...
Crashed: com.google.firebase.crashlytics.ios.exception
0 FirebaseCrashlytics 0x1b658 FIRCLSProcessRecordAllThreads + 172
1 FirebaseCrashlytics 0x1ba64 FIRCLSProcessRecordAllThreads + 1208
2 FirebaseCrashlytics 0x13adc FIRCLSHandler + 48
3 FirebaseCrashlytics 0xe9d4 __FIRCLSExceptionRecord_block_invoke + 92
4 libdispatch.dylib 0x1b584 _dispatch_client_callout + 16
5 libdispatch.dylib 0x11728 _dispatch_lane_barrier_sync_invoke_and_complete + 56
6 FirebaseCrashlytics 0xe260 FIRCLSExceptionRecord + 204
7 FirebaseCrashlytics 0xe4f8 FIRCLSExceptionRecordNSException + 452
8 FirebaseCrashlytics 0xdeb8 FIRCLSTerminateHandler() + 396
9 libc++abi.dylib 0x158b4 std::__terminate(void (*)()) + 16
10 libc++abi.dylib 0x18e1c __cxa_get_exception_ptr + 86
11 libc++abi.dylib 0x18dc4 __cxxabiv1::failed_throw(__cxxabiv1::__cxa_exception*) + 90
12 libobjc.A.dylib 0x31be4 objc_exception_throw + 448
13 CoreFoundation 0x18467c +[NSObject(NSObject) _copyDescription] + 362
14 CoreFoundation 0x31b84 ___forwarding___ + 1492
15 CoreFoundation 0x314f0 _CF_forwarding_prep_0 + 96
16 CoreNFC 0x2ac40 -[NFCHardwareManager areFeaturesSupported:outError:] + 364
17 CoreNFC 0x2b184 -[NFCHardwareManager areFeaturesSupported:expiry:completion:] + 96
18 CoreNFC 0x2f9d8 block_destroy_helper.5 + 8028
19 Dyflexis 0x5c08 closure #1 in DfsNfcHcePlugin.deviceSupportsNFC(_:) + 86 (DfsNfcHcePlugin.swift:86)
20 libswift_Concurrency.dylib 0x5c134 swift::runJobInEstablishedExecutorContext(swift::Job*) + 292
21 libswift_Concurrency.dylib 0x5d5c8 swift_job_runImpl(swift::Job*, swift::SerialExecutorRef) + 156
22 libdispatch.dylib 0x13db0 _dispatch_root_queue_drain + 364
23 libdispatch.dylib 0x1454c _dispatch_worker_thread2 + 156
24 libsystem_pthread.dylib 0x4624 _pthread_wqthread + 232
25 libsystem_pthread.dylib 0x19f8 start_wqthread + 8
...
