incompatible types error unless I use an inline object literal for a dictionary object

[robianmcd]

TypeScript Version:
1.8.7

Code

interface Test {
    field: {[key: string]: string};
}

var test: Test;
var foo = {qwerty: 'qwerty'};

test = {
    field: foo
};

Expected behavior:
I don't see any errors.

Actual behavior:
I get the following error:

app\app.ts(46,1): error TS2322: Type '{ field: { qwerty: string; }; }' is not assignable to type 'Test'.
Types of property 'field' are incompatible.
Type '{ qwerty: string; }' is not assignable to type '{ [key: string]: string; }'.
Index signature is missing in type '{ qwerty: string; }'.

If I modify my code to this then I don't get an error

interface Test {
    field: {[key: string]: string};
}

var test: Test;

test = {
    field: {qwerty: 'qwerty'}
};

[DanielRosenwasser]

Thanks but this looks like a duplicate of #6041. Should be fixed in our nightlies. Give it a try with npm install -g typescript@next!

[robianmcd]

Thanks I'll give that a shot