The @@@BUG@@@ the size of China - std.conv.d - Target parse(Target, Source)(ref Source s, uint radix)

[John Carter via Digitalmars-d-learn]

So whilst attempt to convert from a hex string (without the 0x) 
to int I bumped into the @@@BUG@@@ the size of China....

https://github.com/D-Programming-Language/phobos/blob/master/std/conv.d#L2270
Is there a bugzilla issue number tracking this?

Searching for conv and parse  in the issue tracker didn't turn it 
up....

Is this a phobos bug or a compiler bug?

I followed the example in the unit test to get a workaround.... 
but I don't understand why the workaround works!