Dart : Isolate not working when using html import

问题

I found this very strange and unfortunate behavior in Dart. When I import 'dart:html' in my main file, my Isolate stops working.

With my file "isolate.dart" :

main(){
  print('BAM');
}

This prints "BAM":

import 'dart:core';
import 'dart:isolate';

void main() {
  Isolate.spawnUri(Uri.parse('isolate.dart'), [], null);
}

but this prints nothing :

import 'dart:core';
import 'dart:isolate';
import 'dart:html';

void main() {
  Isolate.spawnUri(Uri.parse('isolate.dart'), [], null);
}

How can I get Isolate to work while using the html import?

UPDATE : I've found this code https://github.com/TomCaserta/ExampleIsolate and tried to work it to find the problem. It seems like the print() call from the Isolate is causing problems.

回答1:

This are known bugs/limitations. It is being worked on.

Currently it is not possible to access functionality of the 'dart:html' package in an isolate and 'print()' crashes the isolate probably because there is no package with a 'print' functionality available where the command can be redirected to.

The Dart issue tracker seems not to be available currently.
I try again later to add some references.

Some open issues that I think are related:

Print statement inside isolate crashes isolate.
Isolate.spawn not allowed in Dartium DOM isolate
Support spawn of dom isolates in Dartium
Unable to break on breakpoint in library loaded by spawnUri
isolate in dartium not creating httprequest, works when compiled to javascript

来源：https://stackoverflow.com/questions/23419979/dart-isolate-not-working-when-using-html-import

标签

dart

dart-isolates