Delay marking inline module scripts as ready

Fixes #9864.

Author: domenic

source

@@ -62669,7 +62669,18 @@ o............A....e
           following steps given <var>result</var>:</p>
 
           <ol>
-           <li><p><span>Mark as ready</span> <var>el</var> given <var>result</var>.</p></li>
+           <li>
+            <p><span>Queue an element task</span> on the <span>networking task source</span>
+            given <var>el</var> to perform the following steps:</p>
+
+            <ol>
+             <li><p><span>Mark as ready</span> <var>el</var> given <var>result</var>.</p></li>
+            </ol>
+
+            <p class="note">Queueing a task here means that, even if the inline module script has
+            no dependencies or synchronously results in a parse error, we won't proceed to
+            <span>execute the script element</span> synchronously.</p>
+           </li>
           </ol>
          </li>
         </ol>