Improve error span for async type inference error
Fixes #62382 Previously, we would point at the spawn of the 'await' expression, instead of the actual expression with an unknown type.
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@ -75,7 +75,7 @@ impl<'a, 'tcx> InteriorVisitor<'a, 'tcx> {
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// If unresolved type isn't a ty_var then unresolved_type_span is None
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self.fcx.need_type_info_err_in_generator(
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self.kind,
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unresolved_type_span.unwrap_or(yield_data.span),
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unresolved_type_span.unwrap_or(source_span),
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unresolved_type,
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)
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.span_note(yield_data.span, &*note)
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@ -0,0 +1,17 @@
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// edition:2018
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#![feature(async_await)]
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// Regression test for issue #62382
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use std::future::Future;
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fn get_future() -> impl Future<Output = ()> {
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panic!()
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}
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async fn foo() {
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let a; //~ ERROR type inside `async` object must be known in this context
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get_future().await;
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}
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fn main() {}
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@ -0,0 +1,15 @@
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error[E0698]: type inside `async` object must be known in this context
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--> $DIR/async-error-span.rs:13:9
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LL | let a;
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| ^ cannot infer type
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note: the type is part of the `async` object because of this `await`
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--> $DIR/async-error-span.rs:14:5
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LL | get_future().await;
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| ^^^^^^^^^^^^^^^^^^
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0698`.
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