.sort vs sort(): std.algorithm not up to the task?

[Andrew Edwards via Digitalmars-d-learn]

On Thursday, 8 June 2017 at 02:21:03 UTC, Stanislav Blinov wrote:
>
> aa.keys.sort() should just work as is: aa.keys returns a 
> string[], and that's a random access range that can be sorted. 
> What exactly is the error?

It does not ... I provided the code and related error message. 
See the line right above "import std.algorith: sort;".