Check impl trait substs when checking for recursive types #64038
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* Make it clear that type erasure is required, not just pointer indirection. * Don't make the message specific to direct recursion.
This prevents mutual `async fn` recursion
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r? @varkor (rust_highfive has picked a reviewer for you, use r? to override) |
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| --> $DIR/mutually-recursive-async-impl-trait-type.rs:5:18 | ||
| | | ||
| LL | async fn rec_1() { | ||
| | ^ recursive `async fn` |
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It'd be nice if we could point out where the recursion is coming from, but that can be left for a follow up diagnostics improvement.
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@bors r+ |
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📌 Commit 877faf3 has been approved by |
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…t-recursion, r=varkor Check impl trait substs when checking for recursive types closes rust-lang#64004
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…t-recursion, r=varkor Check impl trait substs when checking for recursive types closes rust-lang#64004
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Rollup of 15 pull requests Successful merges: - #62860 (Stabilize checked_duration_since for 1.38.0) - #63549 (Rev::rposition counts from the wrong end) - #63985 (Stabilize pin_into_inner in 1.39.0) - #64005 (Add a `Place::is_indirect` method to determine whether a `Place` contains a `Deref` projection) - #64031 (Harden `param_attrs` test wrt. usage of a proc macro `#[attr]`) - #64038 (Check impl trait substs when checking for recursive types) - #64043 (Add some more tests for underscore imports) - #64092 (Update xLTO compatibility table in rustc book.) - #64110 (Refer to "`self` type" instead of "receiver type") - #64120 (Move path parsing earlier) - #64123 (Added warning around code with reference to uninit bytes) - #64128 (unused_parens: account for or-patterns and `&(mut x)`) - #64141 (Minimize uses of `LocalInternedString`) - #64142 (Fix doc links in `std::cmp` module) - #64148 (fix a few typos in comments) Failed merges: r? @ghost
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closes #64004