The following layout test is failing on [GTK] svg/custom/masking-clipping-hidpi.svg since it was added in r154856 <http://trac.webkit.org/changeset/154856> See: http://build.webkit.org/results/GTK%20Linux%2064-bit%20Debug%20WK1/r155180%20%283996%29/results.html
Test is gone now.