fix: Don't create hir::Locals from const path patterns

Author: Veykril

crates/hir/src/semantics/source_to_def.rs

@@ -213,10 +213,15 @@ impl SourceToDefCtx<'_, '_> {
         src: InFile<ast::IdentPat>,
     ) -> Option<(DefWithBodyId, PatId)> {
         let container = self.find_pat_or_label_container(src.syntax())?;
-        let (_body, source_map) = self.db.body_with_source_map(container);
+        let (body, source_map) = self.db.body_with_source_map(container);
         let src = src.map(ast::Pat::from);
         let pat_id = source_map.node_pat(src.as_ref())?;
-        Some((container, pat_id))
+        // the pattern could resolve to a constant, verify that that is not the case
+        if let crate::Pat::Bind { .. } = body[pat_id] {
+            Some((container, pat_id))
+        } else {
+            None
+        }
     }
     pub(super) fn self_param_to_def(
         &mut self,

crates/ide_assists/src/handlers/inline_local_variable.rs

@@ -935,6 +935,20 @@ fn f() {
         0
     };
 }
+"#,
+        );
+    }
+
+    #[test]
+    fn test_inline_let_unit_struct() {
+        check_assist_not_applicable(
+            inline_local_variable,
+            r#"
+struct S;
+fn f() {
+    let S$0 = S;
+    S;
+}
 "#,
         );
     }