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lifetime bound when returning impl Trait is not considered #98719

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estaban opened this issue Jun 30, 2022 · 3 comments
Closed

lifetime bound when returning impl Trait is not considered #98719

estaban opened this issue Jun 30, 2022 · 3 comments
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A-impl-trait Area: impl Trait. Universally / existentially quantified anonymous types with static dispatch. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@estaban
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estaban commented Jun 30, 2022 •
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Lifetimes bounds added to returned impl Trait does not seem to be considered by the compiler.

Example: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=02f184ddb3ce9d04c049c93c9d8b25b5

I would expect the above example to compile: wrap is defined to return a 'static Future, so why is the compiler saying that it should have the same lifetime as &self ?

The issue does not manifest when returning a concrete type like MapErr or BoxFuture<'static, Reply>,

@LucioFranco
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@rustbot label C-bug T-compiler

@rustbot rustbot added C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jun 30, 2022
@aliemjay
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aliemjay commented Jul 2, 2022

Duplicate of #42940.

@rustbot label A-impl-trait

@rustbot rustbot added the A-impl-trait Area: impl Trait. Universally / existentially quantified anonymous types with static dispatch. label Jul 2, 2022
@tamird
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tamird commented Sep 16, 2023

@aliemjay should this be closed as duplicate?

@aliemjay aliemjay closed this as not planned Won't fix, can't repro, duplicate, stale Sep 16, 2023
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A-impl-trait Area: impl Trait. Universally / existentially quantified anonymous types with static dispatch. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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