Fix ICE on debug builds where lints are delayed on the crate root

compiler/rustc_middle/src/hir/map.rs

@@ -1254,10 +1254,18 @@ pub(crate) fn hir_crate_items(tcx: TyCtxt<'_>, _: ()) -> ModuleItems {
         body_owners,
         opaques,
         nested_bodies,
-        delayed_lint_items,
+        mut delayed_lint_items,
         ..
     } = collector;
 
+    // The crate could have delayed lints too, but would not be picked up by the visitor.
+    // The `delayed_lint_items` list is smart - it only contains items which we know from
+    // earlier passes is guaranteed to contain lints. It's a little harder to determine that
+    // for sure here, so we simply always add the crate to the list. If it has no lints,
+    // we'll discover that later. The cost of this should be low, there's only one crate
+    // after all compared to the many items we have we wouldn't want to iterate over later.
+    delayed_lint_items.push(CRATE_OWNER_ID);
+
     ModuleItems {
         add_root: true,
         submodules: submodules.into_boxed_slice(),

tests/ui/attributes/lint_on_root.rs

@@ -0,0 +1,7 @@
+// NOTE: this used to panic in debug builds (by a sanity assertion)
+// and not emit any lint on release builds. See https://github.com/rust-lang/rust/issues/142891.
+#![inline = ""]
+//~^ ERROR valid forms for the attribute are `#[inline(always|never)]` and `#[inline]`
+//~| WARN this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+
+fn main() {}

tests/ui/attributes/lint_on_root.stderr

@@ -0,0 +1,12 @@
+error: valid forms for the attribute are `#[inline(always|never)]` and `#[inline]`
+  --> $DIR/lint_on_root.rs:3:1
+   |
+LL | #![inline = ""]
+   | ^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #57571 <https://github.com/rust-lang/rust/issues/57571>
+   = note: `#[deny(ill_formed_attribute_input)]` on by default
+
+error: aborting due to 1 previous error
+