Wikimedia Bugzilla is closed!

After I vandalised the test page with[1], trying to edit this page resulted in "renderers[annotation.type] is undefined"

var openAnnotations = function( annotations ) {
    var out = '',
        annotation;
    for ( var hash in annotations ) {
        annotation = annotations[hash];
        out += typeof renderers[annotation.type].open === 'function' ? <-- here
            renderers[annotation.type].open( annotation.data ) :
            renderers[annotation.type].open;
        hashStack.push( hash );
        annotationStack[hash] = annotation;
    }


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[1] https://www.mediawiki.org/w/index.php?title=VisualEditor:Test&diff=552553&oldid=552537