Better method mismatch error messages #10509
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flip1995
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Apr 6, 2023
…r=Jarcho
Make redundant_async_block a more complete late pass
This lets us detect more complex situations: `async { x.await }` is simplified into `x` if:
- `x` is an expression without side-effect
- or `x` is an `async` block itself
In both cases, no part of the `async` expression can be part of a macro expansion.
Fixes rust-lang#10509.
Fixes rust-lang#10525.
changelog: [`redundant_async_block`] Do not lint expressions with side effects.
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Rebase + fix of #10118