Compute proper module parent during resolution

Fixes #75982

The direct parent of a module may not be a module
(e.g. `const _: () =  { #[path = "foo.rs"] mod foo; };`).

To find the parent of a module for purposes of resolution, we need to
walk up the tree until we hit a module or a crate root.

1 files changed, 5 insertions, 0 deletions

diff --git a/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs b/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
index 05b8dad3097..68faf9c7a62 100644
--- a/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
+++ b/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
@@ -8,6 +8,7 @@ use rustc_ast as ast;
 use rustc_ast::expand::allocator::AllocatorKind;
 use rustc_data_structures::svh::Svh;
 use rustc_hir as hir;
+use rustc_hir::def::DefKind;
 use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, CRATE_DEF_INDEX, LOCAL_CRATE};
 use rustc_hir::definitions::{DefKey, DefPath, DefPathHash};
 use rustc_middle::hir::exports::Export;
@@ -487,6 +488,10 @@ impl CrateStore for CStore {
         self.get_crate_data(def.krate).def_key(def.index)
     }
 
+    fn def_kind(&self, def: DefId) -> DefKind {
+        self.get_crate_data(def.krate).def_kind(def.index)
+    }
+
     fn def_path(&self, def: DefId) -> DefPath {
         self.get_crate_data(def.krate).def_path(def.index)
     }