waitForCardPresent throws error

[nhim175]

I found some issue with waitForCardPresent on Mac so I open this ticket.

Issue

waitForCardPresent method throws an error: type 'Null' is not a subtype of type 'int'

Steps to reproduce

1. Connect to a card reader

2. Execute the below code (bind to a click handler or something). Most of the code is copied from the example, except for the use of waitForCardPresent

   readCard() async {
   int ctx = await Pcsc.establishContext(PcscSCope.user);
   print('Context: $ctx');
   List<String> readers = await Pcsc.listReaders(ctx);
   
   if (readers.isEmpty) {
     print('Could not detect any reader');
   } else {
     String reader = readers[0];
     print('Using reader: $reader');
     await Pcsc.waitForCardPresent(ctx, reader); // <-------- This line throw error
     CardStruct card = await Pcsc.cardConnect(
         ctx, reader, PcscShare.shared, PcscProtocol.any);
     var response = await Pcsc.transmit(card, [0xFF, 0xCA, 0x00, 0x00, 0x00]);
     print('Response: ${hexDump(response)}');
   
     await Pcsc.cardDisconnect(card.hCard, PcscDisposition.resetCard);
   }
   await Pcsc.releaseContext(ctx);
   }

What's the expected result?

• No errors should be thrown

What's the actual result?

• Error is thrown when the function runs

Additional details / screenshot

• OS: Mac Ventura
• Device: SONY FeliCa RC-S300/P

Error message:

flutter: Context: 2
flutter: Using reader: SONY FeliCa RC-S300/P
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: type 'Null' is not a subtype of type 'int'
#0      PCSCBinding.waitForCardPresent (package:flutter_pcsc_macos/src/pcsc_bindings.dart:149:9)
<asynchronous suspension>
#1      BootScreen.readCard (package:uniform_client_app_flutter/screens/boot.dart:37:7)
<asynchronous suspension>

[milkyway044]

the same: ACS ACR1281 1S Dual Reader macOS 12.6.2 flutter 3.7.5

[milkyway044]

missing one line on two platforms: macos and windows after adding everything works as expected!