This has been happening since we split the bots on r168471 <http://trac.webkit.org/changeset/168471>
And nobody noticed that until now because of bug 133209
The problem is that the file WebKitBuild/Release/gtkdoc-webkitdom.cfg is not being archived on the step archive-built-product of the build-only bots, therefore later the test-only bots can't find it when they decompress the zip with the built product.
I will try to come with a patch.
Created attachment 232098 [details]
Comment on attachment 232098 [details]
Clearing flags on attachment: 232098
Committed r169361: <http://trac.webkit.org/changeset/169361>
All reviewed patches have been landed. Closing bug.