Library: async: extra error is seen in checked mode by onError callback of runZoned

[DartBot]

This issue was originally filed by Ilya.Vazhe...@gmail.com

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There is a difference in behavior between production and checked modes on the test

co19/src/LibTest/async/Future/catchError_A03_t05

f() {
  new Future.error(1).catchError((x,y,z){});
}

main() {
  asyncStart();
  runZoned(f, onError: (e) {
    asyncEnd();
  });
}

In production mode, one error event happens for callback's function type mismatch (three parameters are not supported).

In checked mode, two error event happen, first for callback's function type mismatch, second for error object '1'.

[floitschG]

Added Area-Library, Library-Async, Triaged labels.

[DartBot]

This comment was originally written by Ilya.Vazhev...@gmail.com

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This issue can be closed, see co19 issue #651.

[floitschG]

Added Invalid label.