Incorrect error message with String Literal Types

[yves-dolce]

TypeScript Version:

1.8.5

Code

declare type ConstrainedString = "La première" | "La primera" | "The first";

function f(s : ConstrainedString) {
    console.log(s);
}

f("La primera");
f("La première");
f("The first");


f("De eerste"); // Error message is here, as expected.

Expected behavior:

The second sentence of the error message I see under Visual Studio Code doesn't seem to make sense, does it?
Argument of type '"De eerste"' is not assignable to parameter or type '"La première" | "La primera" | "The first"'. Type '"De eerste"' is not assignable to type "The first"'

I wonder if I should not rather open this under VS Code.

Actual behavior:
Removing that second sentence?

[DanielRosenwasser]

Duplicate of #6541. Thanks for filing!

[DanielRosenwasser]

Actually, thinking about it more, I think we can potentially make some improvements independent of #6541. When the source is of a primitive or literal type, I don't necessarily see the point in diving into these elaborations. I'll look into it.

[DanielRosenwasser]

Fixed - thanks for suggesting that @yves-dolce! The fix will be in our nightly builds "tomorrow" | "mañana" | "demain". 😄

[yves-dolce]

Just saw this, while watching Build 2017... :-)
Thanks for the follow up.