If Yasuo's 'when I attack' trigger is on the chain and Yasuo is removed before the ability resolves, does the ability still resolve?

Ruling: The ability stays on the chain and attempts to resolve even if Yasuo is removed, but Yasuo's specific ability does nothing because it cannot determine where "here" is or what Yasuo's might value is when he's no longer on the field.

Nuances:

• Abilities that reference the source's location ("here") or stats (like might) will fail to do anything if the source is removed or moved
• Abilities with fixed values like "deal 5 damage to a unit" or "draw a card" would still work even if the source is removed
• The ability would also fail if Yasuo was just moved to a different location, since the target was selected when the ability went on the chain but wouldn't be at the same location as Yasuo when it resolves