diff --git a/src/Server.zig b/src/Server.zig
index 213b87e..7e6d252 100644
--- a/src/Server.zig
+++ b/src/Server.zig
@@ -819,6 +819,9 @@ fn saveDocumentHandler(server: *Server, notification: types.DidSaveTextDocumentP
 }
 
 fn closeDocumentHandler(server: *Server, notification: types.DidCloseTextDocumentParams) error{}!void {
+    // cached type info may point to a closed handle
+    server.analyser.invalidate();
+
     server.document_store.closeDocument(notification.textDocument.uri);
 }