Previously, if none of the values supplied for the pltitles, tltemplates, clcategories, or imimages parameters to prop=links, prop=templates, prop=categories, or prop=images were valid titles, the parameter would be ignored and all links, templates, categories, or images would be returned.
With the merge of Gerrit change 347879,[1] this situation will result in no links, templates, categories, or images being returned, as none match the invalid titles supplied.