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Auto merge of #97566 - compiler-errors:rollup-qfxw4j8, r=compiler-errors

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Rollup of 6 pull requests

Successful merges:

 - #89685 (refactor: VecDeques Iter fields to private)
 - #97172 (Optimize the diagnostic generation for `extern unsafe`)
 - #97395 (Miri call ABI check: ensure type size+align stay the same)
 - #97431 (don't do `Sized` and other return type checks on RPIT's real type)
 - #97555 (Source code page: line number click adds `NaN`)
 - #97558 (Fix typos in comment)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2022-05-31 01:17:00 +00:00
commit 47365c0d65
13 changed files with 120 additions and 61 deletions
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13
compiler/rustc_typeck/src/check/check.rs
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@ -105,12 +105,6 @@ pub(super) fn check_fn<'a, 'tcx>(
DUMMY_SP,
param_env,
));
// HACK(oli-obk): we rewrite the declared return type, too, so that we don't end up inferring all
// unconstrained RPIT to have `()` as their hidden type. This would happen because further down we
// compare the ret_coercion with declared_ret_ty, and anything uninferred would be inferred to the
// opaque type itself. That again would cause writeback to assume we have a recursive call site
// and do the sadly stabilized fallback to `()`.
let declared_ret_ty = ret_ty;
fcx.ret_coercion = Some(RefCell::new(CoerceMany::new(ret_ty)));
fcx.ret_type_span = Some(decl.output.span());
@ -254,7 +248,12 @@ pub(super) fn check_fn<'a, 'tcx>(
fcx.next_ty_var(TypeVariableOrigin { kind: TypeVariableOriginKind::DynReturnFn, span });
debug!("actual_return_ty replaced with {:?}", actual_return_ty);
}
fcx.demand_suptype(span, declared_ret_ty, actual_return_ty);
// HACK(oli-obk, compiler-errors): We should be comparing this against
// `declared_ret_ty`, but then anything uninferred would be inferred to
// the opaque type itself. That again would cause writeback to assume
// we have a recursive call site and do the sadly stabilized fallback to `()`.
fcx.demand_suptype(span, ret_ty, actual_return_ty);
// Check that a function marked as `#[panic_handler]` has signature `fn(&PanicInfo) -> !`
if let Some(panic_impl_did) = tcx.lang_items().panic_impl()