No parsing error for invalid constructor initializer

[scheglov]

See pkg/front_end/testcases/regress/issue_31198.dart.

abstract class A {}

class B extends A {
  B(): super().foo() {}
}

bad() {
  new B();
}

main() {}

I think super().foo() is not something valid, is it?

[bwilkerson]

No, it isn't valid. super() can be used to invoke the unnamed constructor from the superclass, but it can't be followed by anything else. super.foo() can be used to invoke a named constructor, but then the parentheses after super are invalid.