Problem with UIImageWriteToSavedPhotosAlbum

Hey there I encountered a problem when calling UIImageWriteToSavedPhotosAlbum with a completionTarget. This error does not appear if I use "@nativescript/ios": "6.5.4", instead of "@nativescript/ios": "7.2.0".

I also tried to use the Typescript Subclassing Syntax without any success.

Error:

====== Assertion failed ======
Native stack trace:
1          0x10f628630 tns::Assert(bool, v8::Isolate*) + 119
2          0x10f620d3d tns::ClassBuilder::GetTypeEncodingType(v8::Isolate*, v8::Local<v8::Value>) + 121
3          0x10f61eda7 tns::ClassBuilder::ExposeDynamicMethods(v8::Local<v8::Context>, objc_class*, v8::Local<v8::Value>, v8::Local<v8::Value>, v8::Local<v8::Object>) + 1069
4          0x10f61e93f tns::ClassBuilder::ExposeDynamicMembers(v8::Local<v8::Context>, objc_class*, v8::Local<v8::Object>, v8::Local<v8::Object>) + 219
5          0x10f61def5 tns::ClassBuilder::ExtendCallback(v8::FunctionCallbackInfo<v8::Value> const&) + 459
6          0x10f75fd2c v8::internal::FunctionCallbackArguments::Call(v8::internal::CallHandlerInfo) + 620
7          0x10f75f1dc v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments) + 556
8          0x10f75e863 v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*) + 259
9          0x10fff7819 Builtins_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_BuiltinExit + 57
10         0x10ff90842 Builtins_InterpreterEntryTrampoline + 194
JavaScript stack trace:
at saveToAlbum (file: .../image-util.ios.ts:10:46)

Code Snippet:
This implementation is based on this post.

const CompletionTarget = (<any> NSObject).extend({
        'thisImage:hasBeenSavedInPhotoAlbumWithError:usingContextInfo:': function (image, error, context) {
            if (error) {
                console.log("on error", error);
            }
        }
    }, {
        exposedMethods: {
            'thisImage:hasBeenSavedInPhotoAlbumWithError:usingContextInfo:': {
                returns: interop.types.void,
                params: [UIImage, NSError, interop.Pointer]
            }
        }
    });
    const completionTarget = CompletionTarget.alloc().init();
    UIImageWriteToSavedPhotosAlbum(imageSource.ios, completionTarget,'thisImage:hasBeenSavedInPhotoAlbumWithError:usingContextInfo:',null);

Calling UIImageWriteToSavedPhotosAlbum without a completionTarget works fine.
UIImageWriteToSavedPhotosAlbum(imageSource.ios, null, null, null);

Setup:

"dependencies": {
    "@angular/animations": "~11.2.7",
    "@angular/common": "~11.2.7",
    "@angular/compiler": "~11.2.7",
    "@angular/core": "~11.2.7",
    "@angular/forms": "~11.2.7",
    "@angular/platform-browser": "~11.2.7",
    "@angular/platform-browser-dynamic": "~11.2.7",
    "@angular/router": "~11.2.7",
    "@nativescript/angular": "~10.0.0",
    "@nativescript/core": "7.3.0",
    "@nativescript/unit-test-runner": "^1.0.2",
    "core-js": "3.9.0",
    "reflect-metadata": "~0.1.12",
    "rxjs": "^6.5.5",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^0.1102.6",
    "@angular/cli": "~11.2.6",
    "@angular/compiler-cli": "~11.2.7",
    "@nativescript/android": "7.0.1",
    "@nativescript/ios": "7.2.0",
    "@nativescript/types": "7.3.0",
    "@nativescript/webpack": "~3.0.0",
    "@ngtools/webpack": "~10.0.0",
    "@types/jasmine": "~3.6.0",
    "codelyzer": "^6.0.0",
    "karma": "6.3.1",
    "karma-jasmine": "~4.0.0",
    "karma-nativescript-launcher": "0.4.0",
    "karma-webpack": "3.0.5",
    "node-sass": "^4.7.1",
    "tslint": "~6.1.3",
    "typescript": "4.1.5"
  }

まず、@nativescript/ios 7.2.0 で image-util.ios.ts の saveToAlbum にある assertion を再現し、その後、同じ UIImageWriteToSavedPhotosAlbum の completionTarget コードをバージョン 6.5.4 と比較します。新しいバージョンで ClassBuilder assertion なしに completion callback が動作すれば、issue は解決です。