That looks like it definitely needs replacing.
Not a fatigue crack by the looks of it. I’d say that it looks like impact damage from a “foreign object” crashing into it or, perhaps, a chain? If so, this is not warranty from a fatigue crack and “normal wear and tear” but more something that one would expect to be covered under a cut price crash replacement policy.
The bonus is that, unlike warranty, where a bike company might, reasonably, expect to have the part back to inspect to determine whether it’s fatigue or abuse, a crash replacement policy is normally no-quibble i.e. they don’t distinguish between a foreign object impacting the frame through no fault of the rider, or you hitting it with a hammer or through just abusing it some how (like with a hammer!).
Hope you get a replacement in time for TwentyFour12
Rob
bigrobracing.co.uk