This error: ERROR: Shaper couldn't shape text run. ../../Source/WebCore/platform/graphics/cairo/FontCairoHarfbuzzNG.cpp(93) : float WebCore::FontCascade::floatWidthForComplexText(const WebCore::TextRun &, HashSet<const WebCore::Font *> *, WebCore::GlyphOverflow *) const Prints very many times in my terminal when loading https://pulse.cio.gov/https/agencies/
I see // FIXME: This should mimic Mac port. was added to this function in r168528.
It also prints many times when running running TestWebViewEditor, which loads a very simple HTML page.
Probably fixed by bug #167956.
Probably fixed.