Stack: ###!!! ASSERTION: unexpected type: 'Not Reached', file c:/mozilla-source/stylo/layout/style/nsComputedDOMStyle.cpp, line 1348 #01: nsComputedDOMStyle::GetPropertyCSSValue (c:\mozilla-source\stylo\layout\style\nscomputeddomstyle.cpp:986) #02: nsComputedDOMStyle::GetPropertyValue (c:\mozilla-source\stylo\layout\style\nscomputeddomstyle.cpp:402) #03: mozilla::dom::CSSStyleDeclarationBinding::getPropertyValue (c:\mozilla-source\stylo\obj-firefox-stylo\dom\bindings\cssstyledeclarationbinding.cpp:165) #04: mozilla::dom::GenericBindingMethod (c:\mozilla-source\stylo\dom\bindings\bindingutils.cpp:2959) #05: js::CallJSNative (c:\mozilla-source\stylo\js\src\jscntxtinlines.h:239) #06: js::InternalCallOrConstruct (c:\mozilla-source\stylo\js\src\vm\interpreter.cpp:460) #07: js::Call (c:\mozilla-source\stylo\js\src\vm\interpreter.cpp:524) #08: js::Wrapper::call (c:\mozilla-source\stylo\js\src\proxy\wrapper.cpp:165) #09: js::CrossCompartmentWrapper::call (c:\mozilla-source\stylo\js\src\proxy\crosscompartmentwrapper.cpp:333) #10: js::Proxy::call (c:\mozilla-source\stylo\js\src\proxy\proxy.cpp:421) #11: js::proxy_Call (c:\mozilla-source\stylo\js\src\proxy\proxy.cpp:662) #12: js::CallJSNative (c:\mozilla-source\stylo\js\src\jscntxtinlines.h:239) #13: js::InternalCallOrConstruct (c:\mozilla-source\stylo\js\src\vm\interpreter.cpp:448) #14: js::Call (c:\mozilla-source\stylo\js\src\vm\interpreter.cpp:524) #15: js::jit::InvokeFunction (c:\mozilla-source\stylo\js\src\jit\vmfunctions.cpp:114) #16: ??? (???:???) This is just a side effect from bug 1296477.

layout/style/test/test_value_cloning.html layout/style/test/test_value_computation.html layout/style/test/test_value_storage.html

Manish, is this fixed with your work in bug 1296477?

Yes, it should have been. There are still some assertions like this floating around, but it's a different crash.