From a1b2e086b379dd9bbd278ddfaf96345027ae78a1 Mon Sep 17 00:00:00 2001
From: Nikolay Vitkov <nvitkov@chromium.org>
Date: Tue, 24 Oct 2023 13:52:41 +0200
Subject: [PATCH] [PreloadScripts] Block empty contexts list

---
 index.bs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/index.bs b/index.bs
index 9dd27b7a6..f2b8e02b1 100644
--- a/index.bs
+++ b/index.bs
@@ -7633,6 +7633,10 @@ The [=remote end steps=] given |session| and |command parameters| are:
 
 1. If |contexts| is not null:
 
+   1. If |contexts| is an empty [=/list=]:
+
+      1. Return an [=error=] with [=error code=] [=invalid argument=].
+
    1. For each |context id| of |contexts|:
 
       1. Let |context| be the result of [=trying=] to [=get a browsing context=] with |context id|.