This records the actual point at which type inference fails and uses that to give a better error message. So where before we would say:
severe: line 76, column 38 of package:angular2/src/forms/directives.dart: [StaticTypeError] Type check failed: [c.validator, this.validator] (List<dynamic>) is not of type List<Function>
c.validator = validators.compose([c.validator, this.validator]);
we will now in addition say:
because c.validator cannot be typed as Function
BUG=
R=vsm@google.com
Review URL: https://codereview.chromium.org/1056183002
Leaf Petersen
25e87d9748