From 463ed5805b091032cfccff8138c55bc21c0e8828 Mon Sep 17 00:00:00 2001
From: Matthieu Dubet <109102217+mdubet@users.noreply.github.com>
Date: Mon, 27 Jan 2025 14:21:46 -0800
Subject: [PATCH] WebKit export of
 https://bugs.webkit.org/show_bug.cgi?id=285114 (#50310)

---
 css/css-nesting/nested-error-recovery.html | 57 ++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 css/css-nesting/nested-error-recovery.html
diff --git a/css/css-nesting/nested-error-recovery.html b/css/css-nesting/nested-error-recovery.html
new file mode 100644
index 00000000000000..2e04582dc2232f
--- /dev/null
+++ b/css/css-nesting/nested-error-recovery.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<title>CSS Nesting: Error recovery</title>
+<link rel="help" href="https://drafts.csswg.org/css-nesting-1">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  html {
+    z-index: 0;
+
+    error3234 {**** ::}
+
+    #test1 {
+      @media screen {
+        z-index: 1;
+      }
+    }
+
+    { whatever }
+
+    :doesntexist {z-index: 9;}
+
+    #test2 {
+      z-index: 2;
+    }
+
+    #test3 {
+      z-index: 3;
+      @media screen {
+        error3234;
+        { foo }
+        z-index:4;
+      }
+      { foo }
+      z-index: 5;
+    }
+
+  }
+</style>
+
+<div id=test1></div>
+<div id=test2></div>
+<div id=test3></div>
+
+<script>
+  test(() => {
+    assert_equals(getComputedStyle(document.documentElement).zIndex, '0');
+  });
+  test(() => {
+    assert_equals(getComputedStyle(document.getElementById("test1")).zIndex, '1');
+  });
+  test(() => {
+    assert_equals(getComputedStyle(document.getElementById("test2")).zIndex, '2');
+  });
+  test(() => {
+    assert_equals(getComputedStyle(document.getElementById("test3")).zIndex, '5');
+  });
+</script>
