Auto merge of #104219 - bryangarza:async-track-caller-dup, r=eholk

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Support `#[track_caller]` on async fns

Adds `#[track_caller]` to the generator that is created when we desugar the async fn.

Fixes #78840

Open questions:
- What is the performance impact of adding `#[track_caller]` to every `GenFuture`'s `poll(...)` function, even if it's unused (i.e., the parent span does not set `#[track_caller]`)? We might need to set it only conditionally, if the indirection causes overhead we don't want.

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bors 2022-11-17 13:47:03 +00:00

parent f0cd4f7e71 4d59954c89

commit af02eee33a

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