fix(hygiene): Resolve relative paths through inline const parents

Treat inline const blocks as transparent scopes when finding relative paths to adjacent local definitions.

Author: zalanlevai

mutest-emit/src/analysis/res.rs

@@ -514,7 +514,7 @@ pub fn locally_visible_def_path<'tcx>(tcx: TyCtxt<'tcx>, def_id: hir::DefId, mut
                 | hir::DefKind::Trait | hir::DefKind::Impl { .. } | hir::DefKind::TraitAlias
                 | hir::DefKind::Fn | hir::DefKind::Const | hir::DefKind::Static { .. } | hir::DefKind::Ctor(..)
                 | hir::DefKind::AssocTy | hir::DefKind::AssocFn | hir::DefKind::AssocConst
-                | hir::DefKind::AnonConst
+                | hir::DefKind::AnonConst | hir::DefKind::InlineConst
             );
             while is_transparent(tcx.def_kind(scope)) && let Some(parent_scope) = tcx.opt_parent(scope) {
                 scope = parent_scope;

tests/ui/hygiene/builtins.rs

@@ -3,6 +3,10 @@
 
 #[cfg(test)]
 mod tests {
+    thread_local! {
+        static TLS: () = Default::default();
+    }
+
     #[test]
     fn test_builtins() {
         println!("{:?}, {:?}, {:?}", 3, 2, Some(1));

tests/ui/hygiene/paths/relative_path_to_super_through_transparent_scopes.rs

@@ -0,0 +1,14 @@
+//@ build
+//@ stderr: empty
+
+#![feature(decl_macro)]
+
+macro m() {
+    // TEST: Relative path to item in parent scope through transparent inline const block.
+    const _: () = {
+        const fn f() {}
+        const { f() };
+    };
+}
+
+m!();