[swift-users] Is there any harm that an @escaping handler never called?

[Slava Pestov]

No, there is no requirement to invoke a closure at least once, escaping or not.

Slava

> On Jul 11, 2017, at 3:55 PM, Zhao Xin via swift-users <swift-users at swift.org> wrote:
> 
> For example, I have an async query, I pass it an `@escaping resultHandler`. If there is any results, the handler will run. However, if the result is empty, the `@escaping resultHandler` will never run.
> 
> Is there any memory leak or something will happen if the `@escaping resultHandler` never runs?
> 
> Zhao Xin
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> swift-users at swift.org
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