Purity of std.conv.to!string

[Nordlöw via Digitalmars-d-learn]

On Sunday, 27 September 2015 at 05:52:26 UTC, Jack Stouffer wrote:
> Please make an issue on https://issues.dlang.org and I'll take 
> a look a this later. Most of the functions in std.conv are 
> templated so it must be some internal function that's not 
> properly annotated, or it's using manual memory management.

Already file here:

https://issues.dlang.org/show_bug.cgi?id=3437
https://issues.dlang.org/show_bug.cgi?id=4850