| Index: experimental/webtry/res/js/webtry.js
 | 
| diff --git a/experimental/webtry/res/js/webtry.js b/experimental/webtry/res/js/webtry.js
 | 
| index 8bce06bfd78261681723f9ea1a90f0cd6c53e0c0..18190e92cb59e6de8bfeabb95b08c0cc0856b25b 100644
 | 
| --- a/experimental/webtry/res/js/webtry.js
 | 
| +++ b/experimental/webtry/res/js/webtry.js
 | 
| @@ -269,7 +269,7 @@
 | 
|          // image to display.
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|          endWait();
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|          body = JSON.parse(e.target.response);
 | 
| -        if (body.compileErrors.length) {
 | 
| +        if (null != body.compileErrors && body.compileErrors.length) {
 | 
|            html = "";
 | 
|            for (i = 0 ; i < body.compileErrors.length ; i++) {
 | 
|              compileError = body.compileErrors[i];
 | 
| 
 |