Required attributes of type Aura.Component[] applied using aura:set are marked as missing

[James Melville]

Create a lightning component "myComponent" with an attribute called "attr" of type "Aura.Component[]". Mark this attribute as required. Create a lightning component which references component "myComponent". Pass some components into the attribute using <aura:set attribute="X">. See that the attribute is not recognised, and component reference is marked with error "Element c:myComponent doesn't have required attribute attr"

[Scott Wells]

Issue tracker grooming. If this is still an issue, please feel free to reopen, ideally with a concrete reproduction scenario.