Verify that the correct crate was resolved

Co-authored-by: Amanieu d'Antras <amanieu@gmail.com>

Author: tgross35

compiler/rustc_metadata/src/creader.rs

@@ -1040,11 +1040,13 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> {
             return;
         }
 
-        let res = self.maybe_resolve_crate(
+        let Some(cnum) = self.resolve_crate(
             sym::compiler_builtins,
             CrateDepKind::Implicit,
             CrateOrigin::Injected,
-        );
+        ) else {
+            return;
+        };
 
         if res.is_ok() {
             info!("`compiler_builtins` found");