js-interop:anonymous annotation with missing external factory constructor

[cjkao]

Describe the issue you're seeing
anonymous annotation without external factory constructor would lead dart2js crash

NoSuchMethodError: method not found: 'orderedForEachParameter'
Receiver: null
Arguments: [Closure: (ParameterElement) => dynamic]
dart:core                                                                 Object.noSuchMethod

Does it happen in Dartium or when compiled to JavaScript?
dart2js

• Dart SDK version: 1.13.0
• pkg/js version: 0.6.0

Failing code:

// or a link to a GitHub repo or gist.github.com
@JS()
@anonymous
class PolarOptions {
  bool scaleShowLabelBackdrop; 
}
void main() {
 new PolarOptions();
}

[sigmundch]

Thanks for reporting - thankfully we already have a fix for this (see #24974). The fix is already available in the Dart dev channel (1.14). There is a pending request to merge the fix into the stable channel too (you can subscribe for updates at #25068).