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6e8646df8b
Fix: infer type of async block with tail return expr Fixes #17106 The `infer_async_block` method calls the `infer_block` method internally, which returns the never type without coercion when `tail_expr` is `None` and `ctx.diverges` is `Diverges::Always`.This is the reason for the bug in this issue. https://github.com/rust-lang/rust-analyzer/blob/cfce2bb46da62950a8b70ddb0b2a12332da1b1e1/crates/hir-ty/src/infer/expr.rs#L1411-L1413 This PR solves the bug by adding a process to coerce after calling `infer_block` method. This code passes all the tests, including tests I added for this isuue, however, I am not sure if this solution is right. I think that this solution is an ad hoc solution. So, I would appreciate to have your review. I apologize if I'm off the mark, but `infer_async_block` method should be rewritten to share code with the process of infering type of `expr::Closure` instead of the `infer_block` method. That way it will be closer to the infer process of rustc.
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