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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <title>Test for bug 1134849</title>
+    <style>
+    div { display: inline-block; vertical-align: top;
+          inline-size: 12em; block-size: 15em;
+          border: solid silver; margin: 10px; }
+    p { margin: 5px; }
+    .h { writing-mode: horizontal-tb; }
+    .v-lr { writing-mode: vertical-lr; }
+    .v-rl { writing-mode: vertical-rl; }
+    span, b { display: inline; } /* but because they're orthogonal, this will compute to inline-block */
+    </style>
+  </head>
+  <body>
+   <div class="h">
+    <p>The <span class="v-lr" id="test">quick <b>brown</b> fox</span> jumps over<br>the <b class="v-rl">lazy</b> dog.</p>
+   </div>
+   <div class="v-lr">
+    <p>The <span class="h">quick <b>brown</b> fox</span> jumps over<br>the <b class="h">lazy</b> dog.</p>
+   </div>
+   <div class="v-rl">
+    <p>The <span class="h">quick <b>brown</b> fox</span> jumps over<br>the <b class="h">lazy</b> dog.</p>
+   </div>
+   <br>
+   <script>
+     /* this should append "inline-block" to the document, not "inline" */
+     document.write(window.getComputedStyle(document.querySelector("#test")).display);
+   </script>
+  </body>
+</html>