From c6b5122d0f1d4df842a31c32084dd85366f520fc Mon Sep 17 00:00:00 2001
From: Wenchen Li <9028430+neo@users.noreply.github.com>
Date: Mon, 28 Nov 2022 17:31:57 -0500
Subject: [PATCH] Invalidate a Node trying to connect itself with the same
 handle

It also be written as `!(elementBelowNodeId === nodeId && elementBelowHandleId === handleId)`
---
 packages/core/src/components/Handle/handler.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/core/src/components/Handle/handler.ts b/packages/core/src/components/Handle/handler.ts
index ff726d30..0052120f 100644
--- a/packages/core/src/components/Handle/handler.ts
+++ b/packages/core/src/components/Handle/handler.ts
@@ -60,7 +60,7 @@ export function checkElementBelowIsValid(
     const isValid =
       connectionMode === ConnectionMode.Strict
         ? (isTarget && elementBelowIsSource) || (!isTarget && elementBelowIsTarget)
-        : true;
+        : elementBelowNodeId !== nodeId || elementBelowHandleId !== handleId;
 
     if (isValid) {
       result.isValid = isValidConnection(connection);