the offset used for the completion cursor should always be relative to the original file and not to the marco file

crates/hir/src/source_analyzer.rs

@@ -67,7 +67,10 @@ impl SourceAnalyzer {
         let scopes = db.expr_scopes(def);
         let scope = match offset {
             None => scope_for(&scopes, &source_map, node),
-            Some(offset) => scope_for_offset(db, &scopes, &source_map, node.with_value(offset)),
+            Some(offset) => {
+                let file_id = node.file_id.original_file(db.upcast());
+                scope_for_offset(db, &scopes, &source_map, InFile::new(file_id.into(), offset))
+            }
         };
         let resolver = resolver_for_scope(db.upcast(), def, scope);
         SourceAnalyzer {
@@ -88,7 +91,10 @@ impl SourceAnalyzer {
         let scopes = db.expr_scopes(def);
         let scope = match offset {
             None => scope_for(&scopes, &source_map, node),
-            Some(offset) => scope_for_offset(db, &scopes, &source_map, node.with_value(offset)),
+            Some(offset) => {
+                let file_id = node.file_id.original_file(db.upcast());
+                scope_for_offset(db, &scopes, &source_map, InFile::new(file_id.into(), offset))
+            }
         };
         let resolver = resolver_for_scope(db.upcast(), def, scope);
         SourceAnalyzer { resolver, def: Some((def, body, source_map)), infer: None, file_id }

crates/ide-completion/src/tests/expression.rs

@@ -513,6 +513,7 @@ fn quux(x: i32) {
 ",
         expect![[r#"
             fn quux(…)   fn(i32)
+            lc x         i32
             ma m!(…)     macro_rules! m
             bt u32
             kw crate::

crates/ide-completion/src/tests/type_pos.rs

@@ -90,11 +90,16 @@ fn x<'lt, T, const C: usize>() -> $0
 }
 
 #[test]
-fn fn_return_type2() {
+fn fn_return_type_no_local_items() {
     check(
         r#"
 fn foo() -> B$0 {
     struct Bar;
+    enum Baz {}
+    union Bax {
+        i: i32,
+        f: f32
+    }
 }
 "#,
         expect![[r#"