webkit-gtk-2.4.9, cairo-1.14.2. Tried to visit http://agar.io/ with uzbl-2012.05.14-1154-g35db169 uzbl-core: /var/tmp/paludis/x11-libs-cairo-1.14.2/work/cairo-1.14.2/src/cairo-scaled-font.c:459: _cairo_scaled_glyph_page_destroy: Assertion `!scaled_font->cache_frozen' failed. #0 0x00006ece810d1dfb in raise () from /lib/libc.so.6 #1 0x00006ece810d33b1 in abort () from /lib/libc.so.6 #2 0x00006ece810ca3c8 in __assert_fail_base () from /lib/libc.so.6 #3 0x00006ece810ca486 in __assert_fail () from /lib/libc.so.6 #4 0x00006ece82669ef2 in _cairo_scaled_glyph_page_destroy () from /usr/lib/libcairo.so.2 #5 0x00006ece8266a151 in _cairo_scaled_font_free_last_glyph () from /usr/lib/libcairo.so.2 #6 0x00006ece8266c998 in _cairo_scaled_glyph_lookup () from /usr/lib/libcairo.so.2 #7 0x00006ece8266ddbd in _cairo_scaled_font_glyph_path () from /usr/lib/libcairo.so.2 #8 0x00006ece8262b47b in _cairo_gstate_glyph_path () from /usr/lib/libcairo.so.2 #9 0x00006ece82617d48 in cairo_glyph_path () from /usr/lib/libcairo.so.2 #10 0x00006ece843609ba in WebCore::Font::drawGlyphs(WebCore::GraphicsContext*, WebCore::SimpleFontData const*, WebCore::GlyphBuffer const&, int, int, WebCore::FloatPoint const&) const () from /usr/lib/libwebkitgtk-3.0.so.0 #11 0x00006ece843c3b77 in WebCore::Font::drawGlyphBuffer(WebCore::GraphicsContext*, WebCore::TextRun const&, WebCore::GlyphBuffer const&, WebCore::FloatPoint&) const () from /usr/lib/libwebkitgtk-3.0.so.0 #12 0x00006ece843c5bc5 in WebCore::Font::drawSimpleText(WebCore::GraphicsContext*, WebCore::TextRun const&, WebCore::FloatPoint const&, int, int) const () from /usr/lib/libwebkitgtk-3.0.so.0 #13 0x00006ece843d2c35 in WebCore::GraphicsContext::drawBidiText(WebCore::Font const&, WebCore::TextRun const&, WebCore::FloatPoint const&, WebCore::Font::CustomFontNotReadyAction) () from /usr/lib/libwebkitgtk-3.0.so.0 #14 0x00006ece84837706 in WebCore::CanvasRenderingContext2D::drawTextInternal(WTF::String const&, float, float, bool, float, bool) () from /usr/lib/libwebkitgtk-3.0.so.0 #15 0x00006ece84f7bacb in WebCore::jsCanvasRenderingContext2DPrototypeFunctionStrokeText(JSC::ExecState*) () from /usr/lib/libwebkitgtk-3.0.so.0 #16 0x00006ece33b7c9c5 in ?? () #17 0x00006ece0effde80 in ?? () #18 0x00006ece8394fee1 in llint_op_call () from /usr/lib/libjavascriptcoregtk-3.0.so.0 #19 0x0000000000000000 in ?? ()