Can someone please explain why the following assertion fails?

[Gary Willoughby via Digitalmars-d-learn]

On Monday, 31 October 2016 at 22:10:30 UTC, Ali Çehreli wrote:
> On 10/31/2016 12:08 PM, Gary Willoughby wrote:
>> Can someone please explain why the following assertion fails?
>>
>> import std.stdio;
>> import std.conv;
>>
>> void main(string[] args)
>> {
>>     auto x = 1;
>>
>>     assert(hashOf(x.to!(string)) == hashOf(x.to!(string)));
>> }
>>
>> Thanks.
>
> I think you need TypeInfo.getHash.
>
>   https://dlang.org/phobos/object.html#.TypeInfo.getHash
>
> import std.conv;
>
> auto myHashOf(T)(auto ref T value) {
>     return typeid(T).getHash(&value);
> }
>
> void main() {
>     auto x = 1;
>     auto s = "1";
>     assert(myHashOf(x.to!string) == myHashOf(x.to!string));
>     assert(myHashOf(s) == myHashOf(s));
>     assert(myHashOf(s) == myHashOf(x.to!string));
> }
>
> Ali

Thanks but `TypeInfo.getHash` is not @nogc. Looks like I'll have 
to roll my own.