nativescript-background-http Nativescript 7 Error

Only testet on iOS @nativescript/ios": "7.0.0".

Please, provide the following version numbers that your issue occurs with:

CLI: 7.0.4
Cross-platform modules: 7.0.0
Runtime(s): @nativescript/ios": "7.0.0"

When I upload a file, I get the error below. The file gets uploaded correct though.

***** Fatal JavaScript exception - application has been terminated. ***** NativeScript encountered a fatal error: Uncaught Error: -[NSInvocation getArgument:atIndex:]: NULL address argument at readProp(file: node_modules/@nativescript/background-http/index.ios.js:218:0) at get upload(file: node_modules/@nativescript/background-http/index.ios.js:235:0) at onProgress(file: node_modules/@nativescript/background-http/index.ios.js:7:0) at (file: node_modules/@nativescript/background-http/index.ios.js:78:0) (CoreFoundation) *** Terminating app due to uncaught exception 'NativeScript encountered a fatal error: Uncaught Error: -[NSInvocation getArgument:atIndex:]: NULL address argument at readProp(file: node_modules/@nativescript/background-http/index.ios.js:218:0) at get upload(file: node_modules/@nativescript/background-http/index.ios.js:235:0) at onProgress(file: node_modules/@nativescript/background-http/index.ios.js:7:0) at (file: node_modules/@nativescript/background-http/index.ios.js:78:0) ', reason: '(null)' *** First throw call stack: ( 0 CoreFoundation 0x00007fff2043a11e __exceptionPreprocess + 242 1 libobjc.A.dylib 0x00007fff20177f78 objc_exception_throw + 48 2 NativeScript 0x00000001054802b4 _ZN3tns21NativeScriptException15OnUncaughtErrorEN2v85LocalINS1_7MessageEEENS2_INS1_5ValueEEE + 882 3 NativeScript 0x00000001058ad668 _ZN2v88internal14MessageHandler25ReportMessageNoExceptionsEPNS0_7IsolateEPKNS0_15MessageLocationENS0_6HandleINS0_6ObjectEEENS_5LocalINS_5ValueEEE + 344 4 NativeScript 0x00000001058ad4c9 _ZN2v88internal14MessageHandl<…>

Sep 09 '20 10:09 gregersen79

I'm having the same issue, have you found any workaround for now?

Sep 19 '20 19:09 msaravitz

Has anyone figured out a workaround?

Sep 23 '20 02:09 mreall

Has anyone figured out a workaround?

I commented out the offending code in the readProp function and that has been working so far. Though I believe you will lose the upload progress tracking.

Sep 23 '20 02:09 msaravitz

Commenting line 254 of index.ios.ts / line 220 of index.ios.js prevents the crash:

invocation.getReturnValue(ret);

I'm still receiving the progress and complete events with the line removed on iOS 14. I haven't tested elsewhere yet.

Sep 26 '20 14:09 3rror404

Thanks @3rror404, that worked for me. For anyone else fairly new to manually updating plugins and wants to fix this while waiting for the official update, here's what I did. Let me know if there's a better process.

Forked @nativescript/plugins and cloned the repo locally.
In the local repo, ran npm setup to initialize the packages.
Commented out line 254 of packages/background-http/index.ios.ts.
Ran npm start and selected @nativescript.background-http.build to build the package.
From my NS 7 project, ran ns plugin add ../ns-plugins/plugins/dist/packages/background-http to add the modified plugin to my app (of course you'll need to replace the path with the path on your local machine).