Can not extend protected method from a class defined in a function

[gberaudo]

The following case causes a compiler error:

// parent.js 
goog.provide('Parent');
Parent = class {
  /** @protected */
  method() { }
};

// wrapper.js 
goog.provide('Wrapper');
goog.require('Parent');
/**
 * @constructor
 */
Wrapper = function() {
  var Child = class extends Parent {
    /** @override */
    method() {
      super.method();
    }
  };
  new Child();
};
new Wrapper();

# Compilation
java -jar compiler.jar --entry_point=Wrapper --js *.js --jscomp_error "*"

The issue only occurs when the Child class is defined inside the Wrapper constructor.
The build passes when moving the definition to the top level (and adding a goog.provide).

Tested with google-closure-compiler 20171023.0.1.

[ChadKillingsworth]

Try with the --new_type_inf flag.

[gberaudo]

You are right @ChadKillingsworth, it passes when using NTI.

It is unfortunately not an option since with NTI in compatibility mode I immediately get a first round of 5000 errors. :(

[ChadKillingsworth]

I very much doubt that anyone will be willing to address this in OTI.