The Diablo 4 PTR for Season 9 is underway and it didn’t take too long for players to break things and discover bugs! Just 20 minutes into testing, a player has managed to hit infinite damage, triggering a bug that causes numbers to go negative!

As you can see in the screenshot, the player managed to hit a damage number so high it overflowed into the negatives: -9,223,372,036,854,775,808, the exact lower limit of a 64-bit signed integer.
You can also watch a video with combat and the infinite damage chaos below.
Infinity Bleed Damage Barbarian Diablo 4 PTR May 27 2025