How the tables have turned ... Here's the list of the reference tests that are failing after the subpixel layout was enabled on the GTK port: css3/flexbox/auto-margins.html fast/css/sticky/sticky-writing-mode-vertical-lr.html fast/exclusions/shape-inside/shape-inside-percentage.html fast/regions/region-content-flown-into-region.html fast/regions/webkit-flow-inlines-inside-regions-bounds-vertical.html fast/regions/webkit-flow-inlines-inside-regions-bounds.html Of course, the failures should be investigated.
(In reply to comment #0) > fast/regions/region-content-flown-into-region.html The tests flagged in bug #122511 have a very similar issue to the previous one.
css3/flexbox/auto-margins.html is passing since r178063 which updates the test expectations. I will remove this bug from TestExpectations file.
According to https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/11947/steps/layout-test/logs/stdio fast/text/complex-initial-advance.html seems to pass. Will update expectations.
It is fixed because the expectations was updated in r250884 (2019-Oct) The https://webkit.org/b/206079 removes the expectation in GTK+ from platform/gtk/TestExpectations for related to this defect.