diff --git a/packages/svelte/src/compiler/phases/scope.js b/packages/svelte/src/compiler/phases/scope.js
index c952e06e28..c0c9e9c9da 100644
--- a/packages/svelte/src/compiler/phases/scope.js
+++ b/packages/svelte/src/compiler/phases/scope.js
@@ -172,6 +172,8 @@ class Evaluation {
 						}
 						break;
 					}
+
+					// TODO each index is always defined
 				}
 
 				// TODO glean what we can from reassignments