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Rollup merge of #117858 - compiler-errors:span, r=lcnr

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Compute layout with spans for better cycle errors in coroutines

Split out from #117703, this PR at least gives us a nicer span to point at when we hit a cycle error in coroutine layout cycles.
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Takayuki Maeda 2023-11-14 00:54:16 +09:00 • committed by GitHub
commit cf21b6ef28
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5 changed files with 30 additions and 19 deletions
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7
compiler/rustc_ast_lowering/src/expr.rs
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@ -792,8 +792,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
// debuggers and debugger extensions expect it to be called `__awaitee`. They use
// this name to identify what is being awaited by a suspended async functions.
let awaitee_ident = Ident::with_dummy_span(sym::__awaitee);
let (awaitee_pat, awaitee_pat_hid) =
self.pat_ident_binding_mode(span, awaitee_ident, hir::BindingAnnotation::MUT);
let (awaitee_pat, awaitee_pat_hid) = self.pat_ident_binding_mode(
gen_future_span,
awaitee_ident,
hir::BindingAnnotation::MUT,
);
let task_context_ident = Ident::with_dummy_span(sym::_task_context);