Prevent potential bug resulting from changing crate_hash query name

2021-01-11 13:31:43 -08:00
parent 0962e5eba9
commit 8e7cbc28a6
2 changed files with 4 additions and 1 deletions
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -1220,6 +1220,8 @@ rustc_queries! {
            eval_always
            desc { "looking up the disambiguator a crate" }
        }
+        // The macro which defines `rustc_metadata::provide_extern` depends on this query's name.
+        // Changing the name should cause a compiler error, but in case that changes, be aware.
        query crate_hash(_: CrateNum) -> Svh {
            eval_always
            desc { "looking up the hash a crate" }