Error "'this' implicitly has type 'any'" when used .bind()

› tsc --version
Version 2.7.0-dev.20171020

Code

tsconfig.json:

{
    "compilerOptions": {
        "allowJs": true,
        "checkJs": true,
        "noEmit": true,
        "strict": true
    },
    "files": [
        "index.d.ts",
        "index.js"
    ]
}

index.js:

/** @type {MyObj} */
const o = {
    foo: function() {
        (function() {
            console.log(this); // <- Unexpected error here.
        }.bind(this))();
    }
};

index.d.ts:

interface MyObj {
    foo(this: { a: number }): void;
}

How it looks in the editor:

Context of foo() is defined:

But context passed to the nested function is lost:

Expected behavior:

There should not be error, because this explicitly specified by .bind().

Actual behavior:

› tsc
index.js(5,25): error TS2683: 'this' implicitly has type 'any' because it does not have a type annotation.

Start by reproducing the diagnostic with the provided tsconfig.json, index.js, and index.d.ts using the reported tsc setup. Trace how JavaScript checking resolves this for the nested function and .bind(this); done means the example no longer reports TS2683 while related behavior remains covered by tests.