Sanity check computed value for feeable queries.

1 files changed, 9 insertions, 0 deletions

diff --git a/compiler/rustc_macros/src/query.rs b/compiler/rustc_macros/src/query.rs
index 30c42757dbe..4047969724a 100644
--- a/compiler/rustc_macros/src/query.rs
+++ b/compiler/rustc_macros/src/query.rs
@@ -359,6 +359,15 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
         });
 
         if modifiers.feedable.is_some() {
+            assert!(modifiers.anon.is_none(), "Query {name} cannot be both `feedable` and `anon`.");
+            assert!(
+                modifiers.eval_always.is_none(),
+                "Query {name} cannot be both `feedable` and `eval_always`."
+            );
+            assert!(
+                modifiers.no_hash.is_none(),
+                "Query {name} cannot be both `feedable` and `no_hash`."
+            );
             feedable_queries.extend(quote! {
                 #(#doc_comments)*
                 [#attribute_stream] fn #name(#arg) #result,