1 files changed, 33 insertions, 0 deletions
diff --git a/layout/reftests/svg/smil/syncbase/cycle-invalid-4.svg b/layout/reftests/svg/smil/syncbase/cycle-invalid-4.svg
new file mode 100644
index 000000000..ddf489308
--- /dev/null
+++ b/layout/reftests/svg/smil/syncbase/cycle-invalid-4.svg
@@ -0,0 +1,33 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="
+        document.documentElement.pauseAnimations();
+        document.documentElement.setCurrentTime(0);
+        document.getElementById('a').removeAttribute('dur');
+        setTimeAndSnapshot(2, false)">
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <!--
+    A cycle that is valid at first but then becomes invalid.
+
+    So at first we have:
+    a: 0s-1.5s
+    new -> b: 1.5s-2.5s
+    new -> a: add 1.5s begin instance time
+
+    Remove 'dur' attr:
+    a: 0s-unresolved
+    change -> b: unresolved... delete interval
+    delete -> a: already visited <break>
+
+    a: 0s-unresolved
+    b: unresolved-unresolved
+   -->
+  <rect width="100" height="100" fill="green">
+    <animate attributeName="y" attributeType="XML" from="0" to="0" id="a"
+      begin="b.begin; 0s" dur="1.5s"/>
+    <animate attributeName="fill" attributeType="CSS" id="b"
+      values="red; red"
+      begin="a.end" dur="1s"/>
+  </rect>
+</svg>