[dart2js] Incorrect code generated in body of a function used as a .call getter

[nshahan]

There is some randomness thrown into this example to avoid inlining.

import 'dart:math';

class C {
  int Function(String) get call => (s) => s.length;
}

main() {
  var s = '${Random().nextBool() ? 'hello' : 'goodbye'} world';
  print(s.length); // prints as expected
  var c = C();
  print(c.call(s)); // boom!
}

In the main method s.length gets compiled to s.length in JavaScript.

In the body of the .call function s.length gets compiled to s.get$length in JavaScript which is not defined and will cause an error to be thrown.

Uncaught TypeError: s.get$length is not a function
    at C_call_closure.call$1 (out.js:2628:16)
    at C.call$1 (out.js:2623:31)
    at main (out.js:2322:25)
    at out.js:2728:7
    at out.js:2709:7
    at dartProgram (out.js:2722:5)
    at out.js:2731:3