From de9151942312052671b00898b59421ed4dd44c62 Mon Sep 17 00:00:00 2001
From: Yves Lafon <ylafon@w3.org>
Date: Tue, 23 Apr 2024 18:26:02 +0200
Subject: [PATCH] add a default media if the list is empty and a mediafeature
 is about to be added

---
 org/w3c/css/atrules/css3/AtRuleMedia.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/org/w3c/css/atrules/css3/AtRuleMedia.java b/org/w3c/css/atrules/css3/AtRuleMedia.java
index b2ea0d816..654eafd3b 100644
--- a/org/w3c/css/atrules/css3/AtRuleMedia.java
+++ b/org/w3c/css/atrules/css3/AtRuleMedia.java
@@ -80,7 +80,13 @@ public org.w3c.css.atrules.css.AtRuleMedia addMedia(String restrictor, String me
      */
     public void addMediaFeature(MediaFeature feature, ApplContext ac)
             throws InvalidParamException {
-        Media latest = allMedia.get(allMedia.size() - 1);
+        Media latest;
+        if (allMedia.isEmpty()) {
+            latest = new Media();
+            allMedia.add(latest);
+        } else {
+            latest = allMedia.get(allMedia.size() - 1);
+        }
         latest.addFeature(feature);
     }