Compiler errors for module augmentation with export=

[yortus]

TypeScript Version:

nightly (1.9.0-dev.20160217)

Problem Description:

I've copied the following code verbatim from a baseline test file for #6742. My understanding is that this code should compile without errors, but I get two errors, which I've indicated with comments. The output .js files are exactly as expected.

Code

//// [file1.ts]
function foo() {}
namespace foo {
    export var v = 1;
}
export = foo;


//// [file2.ts]
import x = require("./file1"); 
x.b = 1;                // OK

declare module "./file1" {
    interface A { a }   // ERROR: Module augmentation cannot introduce new names in the top level scope
    let b: number;      // ERROR: Module augmentation cannot introduce new names in the top level scope
}


//// [file3.ts]
import * as x from "./file1";
import "./file2";
let a: x.A;     // OK, a's type is interface A
let b = x.b;    // OK, b's type is number


//// [tsconfig.json]
{
    "compilerOptions": {
        "target": "es6",
        "module": "amd"
    }
}

Expected behavior:

No compiler errors.

Actual behavior:

Two compiler errors, as indicated in the code comments.

Additional info:

I also copied and compiled the express.d.ts baseline test, and that does compile for me with no errors.

[yortus]

ping @vladima

[yortus]

Closing.

My misunderstanding - I see now the two compiler errors I'm getting are expected, as per https://github.com/Microsoft/TypeScript/blob/master/tests/baselines/reference/augmentExportEquals3.errors.txt