size_t index=-1;

[Basile B. via Digitalmars-d-learn]

On Saturday, 19 March 2016 at 09:33:25 UTC, tsbockman wrote:
> [...] The reason that *attempting* such a comparison produces 
> such weird results, is because the signed value is being 
> implicitly cast to an unsigned type.

Yes and that's the opposite that should happend: when signed and 
unsigned are mixed in a comparison, the unsigned value should be 
implictly cast to a wider signed value. And then it works!

- https://issues.dlang.org/show_bug.cgi?id=15805
- 
https://github.com/BBasile/iz/blob/v0.5.8/import/iz/sugar.d#L1017