If Crackshot Corsair has Gust played on her before her attack trigger resolves, does the trigger still hit the targeted unit?

Ruling: No, the attack trigger does not resolve. When Gust returns Crackshot Corsair to hand before her attack trigger resolves, the effect fails because it requires the target to be "here" and there is no "here" anymore once Corsair is returned to hand.

Nuances:

• Effects that depend on a location (like Crackshot Corsair's attack trigger) can fail to resolve if the source is removed
• Effects that don't depend on location (like Miss Fortune's movement trigger that readies "anything" not "anything here") will still resolve even if the source disappears
• This distinction is intentional design - some abilities are made to be more reliable than others