#0  0x00007fffe7abc2ef in hb_font_t::parent_scale_position (y=0x7fff6fff997c, x=0x7fff6fff9978, this=0x7fff680b75b0) at ../../src/hb-font-private.hh:140
#1  hb_font_get_glyph_h_origin_nil (font=0x7fff680b75b0, font_data=<optimized out>, glyph=<optimized out>, x=0x7fff6fff9978, y=0x7fff6fff997c, user_data=<optimized out>) at ../../src/hb-font.cc:97
#2  0x00007fffe7add28b in hb_font_t::get_glyph_h_origin (y=0x7fff6fff997c, x=0x7fff6fff9978, glyph=0, this=0x7fff680b75b0) at ../../src/hb-font-private.hh:182
#3  hb_font_t::get_glyph_origin_for_direction (y=0x7fff6fff997c, x=0x7fff6fff9978, direction=<optimized out>, glyph=0, this=0x7fff680b75b0) at ../../src/hb-font-private.hh:281
#4  hb_font_t::subtract_glyph_origin_for_direction (y=<optimized out>, x=<optimized out>, direction=<optimized out>, glyph=0, this=0x7fff680b75b0) at ../../src/hb-font-private.hh:319
#5  hb_ot_position_default (c=<synthetic pointer>, c=<synthetic pointer>) at ../../src/hb-ot-shape.cc:656
#6  hb_ot_position (c=<synthetic pointer>) at ../../src/hb-ot-shape.cc:749
#7  hb_ot_shape_internal (c=<synthetic pointer>) at ../../src/hb-ot-shape.cc:793
#8  _hb_ot_shape (shape_plan=shape_plan@entry=0x7fff68096a10, font=font@entry=0x7fff680b75b0, buffer=buffer@entry=0x7fff680d4910, features=features@entry=0x0, num_features=num_features@entry=0) at ../../src/hb-ot-shape.cc:813
#9  0x00007fffe7ac058a in hb_shape_plan_execute (shape_plan=shape_plan@entry=0x7fff68096a10, font=font@entry=0x7fff680b75b0, buffer=buffer@entry=0x7fff680d4910, features=features@entry=0x0, num_features=num_features@entry=0) at ../../src/hb-shaper-list.hh:43
#10 0x00007fffe7abfab1 in hb_shape_full (font=0x7fff680b75b0, buffer=0x7fff680d4910, features=0x0, num_features=0, shaper_list=<optimized out>) at ../../src/hb-shape.cc:380
#11 0x00007ffff0aad986 in blink::HarfBuzzShaper::shapeResult() () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#12 0x00007ffff0aab319 in blink::CachingWordShapeIterator::shapeWordWithoutSpacing(blink::TextRun const&, blink::Font const*) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#13 0x00007ffff0aab400 in blink::CachingWordShapeIterator::shapeWord(blink::TextRun const&, blink::Font const*) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#14 0x00007ffff0aab4c3 in blink::CachingWordShapeIterator::shapeToEndIndex(WTF::RefPtr<blink::ShapeResult const>*, unsigned int) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#15 0x00007ffff0aab897 in blink::CachingWordShapeIterator::next(WTF::RefPtr<blink::ShapeResult const>*) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#16 0x00007ffff0aa993f in blink::CachingWordShaper::width(blink::Font const*, blink::TextRun const&, WTF::HashSet<blink::SimpleFontData const*, WTF::PtrHash<blink::SimpleFontData const>, WTF::HashTraits<blink::SimpleFontData const*>, WTF::PartitionAllocator>*, blink::FloatRect*) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#17 0x00007ffff0aa45d1 in blink::Font::floatWidthForComplexText(blink::TextRun const&, WTF::HashSet<blink::SimpleFontData const*, WTF::PtrHash<blink::SimpleFontData const>, WTF::HashTraits<blink::SimpleFontData const*>, WTF::PartitionAllocator>*, blink::FloatRect*) const ()
   from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#18 0x00007ffff0aa4660 in blink::Font::width(blink::TextRun const&, WTF::HashSet<blink::SimpleFontData const*, WTF::PtrHash<blink::SimpleFontData const>, WTF::HashTraits<blink::SimpleFontData const*>, WTF::PartitionAllocator>*, blink::FloatRect*) const ()
   from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#19 0x00007ffff1258328 in blink::CanvasRenderingContext2D::drawTextInternal(WTF::String const&, double, double, blink::CanvasRenderingContext2DState::PaintType, double*) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#20 0x00007ffff13b969a in blink::CanvasRenderingContext2DV8Internal::fillTextMethodCallback(v8::FunctionCallbackInfo<v8::Value> const&) () from /programming/install/5.8-debug/lib/libQt5WebEngineCore.so.5
#21 0x00007fffee75c6cd in v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&)) () at /programming/qt/5.8/qtwebengine/src/3rdparty/chromium/skia/config/sk_ref_cnt_ext_debug.h:26
#22 0x00007fffee1b66e7 in v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::(anonymous namespace)::BuiltinArguments) [clone .constprop.390] () at /programming/qt/5.8/qtwebengine/src/3rdparty/chromium/skia/config/sk_ref_cnt_ext_debug.h:26
#23 0x00007fffee1b7e23 in v8::internal::Builtin_Impl_HandleApiCall(v8::internal::(anonymous namespace)::BuiltinArguments, v8::internal::Isolate*) [clone .constprop.387] () at /programming/qt/5.8/qtwebengine/src/3rdparty/chromium/skia/config/sk_ref_cnt_ext_debug.h:26
#24 0x00007fffee1b82fa in v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) () at /programming/qt/5.8/qtwebengine/src/3rdparty/chromium/skia/config/sk_ref_cnt_ext_debug.h:26
#25 0x00000950eac06147 in ?? ()
#26 0x0000d83d00000000 in ?? ()
#27 0x00000950eac06081 in ?? ()
#28 0x00007fff6fffa820 in ?? ()
#29 0x0000000300000000 in ?? ()
#30 0x00007fff6fffa8d0 in ?? ()
#31 0x00000950eac6a3dd in ?? ()
#32 0x00000d9d8d004399 in ?? ()
#33 0x00000c0a900713a9 in ?? ()
#34 0x0000000000000000 in ?? ()