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no current element and `assertion failed: self.reflow(ReflowGoal::ForScriptQuery, ...` on movieweb.com #18440

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mateon1 opened this issue Sep 10, 2017 · 2 comments
Open

no current element and `assertion failed: self.reflow(ReflowGoal::ForScriptQuery, ...` on movieweb.com #18440

mateon1 opened this issue Sep 10, 2017 · 2 comments
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A-content/parsers I-panic

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@mateon1
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@mateon1 mateon1 commented Sep 10, 2017

Found visiting http://movieweb.com. Neither panic could be reproduced a second time. (I believe they were caused by ads)

There are two panics here, the first - no current element, the second, in another pipeline - assertion failed: self.reflow(ReflowGoal::ForScriptQuery, ReflowQueryType::NodeOverflowQuery(node), ReflowReason::Query)

no current element (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(0), index: PipelineIndex(0) }, at /checkout/src/libcore/option.rs:839)
stack backtrace:
   0:     0x55621b1830dc - backtrace::backtrace::trace::h0f1eee7f17c620ad
   1:     0x55621b183112 - backtrace::capture::Backtrace::new::h1abdde591da67f3d
   2:     0x556219ee2865 - servo::main::{{closure}}::h2775028620a930e9
   3:     0x55621c697b26 - std::panicking::rust_panic_with_hook
                        at /checkout/src/libstd/panicking.rs:612
   4:     0x55621c697944 - std::panicking::begin_panic<alloc::string::String>
                        at /checkout/src/libstd/panicking.rs:572
   5:     0x55621c6978b9 - std::panicking::begin_panic_fmt
                        at /checkout/src/libstd/panicking.rs:522
   6:     0x55621c69784a - std::panicking::rust_begin_panic
                        at /checkout/src/libstd/panicking.rs:498
   7:     0x55621c6d1e30 - core::panicking::panic_fmt
                        at /checkout/src/libcore/panicking.rs:71
   8:     0x55621c6d1e9d - core::option::expect_failed
                        at /checkout/src/libcore/option.rs:839
   9:     0x55621a97a924 - <html5ever::tree_builder::TreeBuilder<Handle, Sink>>::appropriate_place_for_insertion::h5990a0af3f562da4
  10:     0x55621a97d998 - <html5ever::tree_builder::TreeBuilder<Handle, Sink>>::step::h944a4d59a6613702
  11:     0x55621a543646 - <html5ever::tree_builder::TreeBuilder<Handle, Sink> as html5ever::tokenizer::interface::TokenSink>::process_token::hf8b4d2ed4ceb46e9
  12:     0x55621a8de710 - <html5ever::tokenizer::Tokenizer<Sink>>::process_token::h3082f21938c8d098
  13:     0x55621a8f13aa - <html5ever::tokenizer::Tokenizer<Sink>>::step::h561d39b82e8c1c57
  14:     0x55621a8e77bf - <html5ever::tokenizer::Tokenizer<Sink>>::run::haa9ddb9af48b9b62
  15:     0x55621ac17c87 - script::dom::servoparser::html::Tokenizer::feed::h0a3f7f91fb90879a
  16:     0x55621ac1ca6a - script::dom::servoparser::ServoParser::write::hae4182c0f99487d2
  17:     0x55621aaf344b - <script::dom::document::Document as script::dom::bindings::codegen::Bindings::DocumentBinding::DocumentBinding::DocumentMethods>::Write::h2c1f1ae16be7dbda
  18:     0x55621a6737d6 - std::panicking::try::do_call::h6437629ed82e8390
  19:     0x55621c69ebcc - panic_unwind::__rust_maybe_catch_panic
                        at /checkout/src/libpanic_unwind/lib.rs:99
  20:     0x55621ae1b491 - script::dom::bindings::codegen::Bindings::DocumentBinding::DocumentBinding::write::h5748d4e13e14d881
  21:     0x55621b383444 - CallJitMethodOp
                        at /shared/dev/rust/servo/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/3de4ff3/src/jsglue.cpp:516
  22:     0x55621aa6e6e1 - script::dom::bindings::utils::generic_call::h3cf5c8561aec2955
  23:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  24:     0x55621b9cd7f9 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:453
  25:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  26:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  27:     0x55621b8e6904 - _ZNK2js7Wrapper4callEP9JSContextN2JS6HandleIP8JSObjectEERKNS3_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/proxy/Wrapper.cpp:165
  28:     0x55621b8ccdd0 - _ZNK2js23CrossCompartmentWrapper4callEP9JSContextN2JS6HandleIP8JSObjectEERKNS3_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/proxy/CrossCompartmentWrapper.cpp:329
  29:     0x55621b8dce3b - _ZN2js5Proxy4callEP9JSContextN2JS6HandleIP8JSObjectEERKNS3_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/proxy/Proxy.cpp:401
  30:     0x55621b8de0bd - _ZN2js10proxy_CallEP9JSContextjPN2JS5ValueE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/proxy/Proxy.cpp:689
  31:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  32:     0x55621b9cd6fd - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:441
  33:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  34:     0x55621b9cdb4a - _ZN2js13CallFromStackEP9JSContextRKN2JS8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:504
  35:     0x55621b9dab76 - Interpret
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:2873
  36:     0x55621b9cd47b - _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:399
  37:     0x55621b9cd8c8 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:471
  38:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  39:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  40:     0x55621b7df2fb - _ZN2js8fun_callEP9JSContextjPN2JS5ValueE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsfun.cpp:1256
  41:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  42:     0x55621b9cd7f9 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:453
  43:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  44:     0x55621b9cdb4a - _ZN2js13CallFromStackEP9JSContextRKN2JS8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:504
  45:     0x55621b9dab76 - Interpret
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:2873
  46:     0x55621b9cd47b - _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:399
  47:     0x55621b9cd8c8 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:471
  48:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  49:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  50:     0x55621b7df7aa - _ZN2js9fun_applyEP9JSContextjPN2JS5ValueE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsfun.cpp:1325
  51:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  52:     0x55621b9cd7f9 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:453
  53:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  54:     0x55621b9cdb4a - _ZN2js13CallFromStackEP9JSContextRKN2JS8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:504
  55:     0x55621b9dab76 - Interpret
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:2873
  56:     0x55621b9cd47b - _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:399
  57:     0x55621b9ce83e - _ZN2js13ExecuteKernelEP9JSContextN2JS6HandleIP8JSScriptEER8JSObjectRKNS2_5ValueENS_16AbstractFramePtrEPS9_
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:679
  58:     0x55621b9ceafe - _ZN2js7ExecuteEP9JSContextN2JS6HandleIP8JSScriptEER8JSObjectPNS2_5ValueE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:712
  59:     0x55621b73e1e5 - Evaluate
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsapi.cpp:4407
  60:     0x55621b73e520 - Evaluate
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsapi.cpp:4443
  61:     0x55621b73eaa0 - _ZN2JS8EvaluateEP9JSContextRKNS_22ReadOnlyCompileOptionsEPKDsmNS_13MutableHandleINS_5ValueEEE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsapi.cpp:4501
  62:     0x55621ab2f28b - script::dom::globalscope::GlobalScope::evaluate_script_on_global_with_result::{{closure}}::h83fc4921bb848a61
  63:     0x55621ab2efad - script::dom::globalscope::GlobalScope::evaluate_script_on_global_with_result::hd6b6c282abf11e67
  64:     0x55621ab9cfec - script::dom::htmlscriptelement::HTMLScriptElement::run_a_classic_script::h52442ddee9733c68
  65:     0x55621ab9c169 - script::dom::htmlscriptelement::HTMLScriptElement::execute::h26e02815c40a4313
  66:     0x55621aade50a - script::dom::document::Document::asap_script_loaded::h2c56184436552f9b
  67:     0x55621ab975f3 - <script::dom::htmlscriptelement::ScriptContext as net_traits::FetchResponseListener>::process_response_eof::h1e774f544905b750
  68:     0x55621acdb0db - <script::network_listener::ListenerRunnable<A, Listener> as script::script_thread::Runnable>::handler::h1ea5d021e9e008c6
  69:     0x55621ace1351 - <script::script_thread::CancellableRunnable<T> as script::script_thread::Runnable>::main_thread_handler::h32c4de0836642461
  70:     0x55621acff91c - script::script_thread::ScriptThread::handle_msg_from_script::h51bceeab9eb522ae
  71:     0x55621acf824e - script::script_thread::ScriptThread::handle_msgs::{{closure}}::hdd3fd9041a1efa8f
  72:     0x55621acf48cf - script::script_thread::ScriptThread::handle_msgs::h4aadf07f4dff3bf3
  73:     0x55621acefceb - script::script_thread::ScriptThread::start::h543e6bc16496788a
  74:     0x55621a59f8f0 - std::sys_common::backtrace::__rust_begin_short_backtrace::hcbce24426485d7f2
  75:     0x55621a6cc605 - std::panicking::try::do_call::h8ef268d0617cbd63
  76:     0x55621c69ebcc - panic_unwind::__rust_maybe_catch_panic
                        at /checkout/src/libpanic_unwind/lib.rs:99
  77:     0x55621a8d60b2 - <F as alloc::boxed::FnBox<A>>::call_box::h4e198348b3252fbb
  78:     0x55621c6967ab - alloc::boxed::{{impl}}::call_once<(),()>
                        at /checkout/src/liballoc/boxed.rs:692
                         - std::sys_common::thread::start_thread
                        at /checkout/src/libstd/sys_common/thread.rs:21
                         - std::sys::imp::thread::{{impl}}::new::thread_start
                        at /checkout/src/libstd/sys/unix/thread.rs:84
  79:     0x7f0c10a23493 - start_thread
  80:     0x7f0c10550abe - __clone
  81:                0x0 - <unknown>
assertion failed: self.reflow(ReflowGoal::ForScriptQuery,
            ReflowQueryType::NodeOverflowQuery(node), ReflowReason::Query) (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(2) }, at /shared/dev/rust/servo/components/script/dom/window.rs:1441)
stack backtrace:
   0:     0x55621b1830dc - backtrace::backtrace::trace::h0f1eee7f17c620ad
   1:     0x55621b183112 - backtrace::capture::Backtrace::new::h1abdde591da67f3d
   2:     0x556219ee2865 - servo::main::{{closure}}::h2775028620a930e9
   3:     0x55621c697b26 - std::panicking::rust_panic_with_hook
                        at /checkout/src/libstd/panicking.rs:612
   4:     0x55621a5a307a - std::panicking::begin_panic::h99ca1191232fecb5
   5:     0x55621ab039eb - script::dom::element::Element::potentially_scrollable::h8fdf39cfb58b841a
   6:     0x55621ab11283 - <script::dom::element::Element as script::dom::bindings::codegen::Bindings::ElementBinding::ElementBinding::ElementMethods>::ScrollLeft::h733c9a7d486ad29f
   7:     0x55621a76b3a5 - std::panicking::try::do_call::hda2d963be6ad4031
   8:     0x55621c69ebcc - panic_unwind::__rust_maybe_catch_panic
                        at /checkout/src/libpanic_unwind/lib.rs:99
   9:     0x55621ae3fa31 - script::dom::bindings::codegen::Bindings::ElementBinding::ElementBinding::get_scrollLeft::h23968b469a485d5b
  10:     0x55621b38336c - CallJitGetterOp
                        at /shared/dev/rust/servo/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/3de4ff3/src/jsglue.cpp:498
  11:     0x55621aa6e6e1 - script::dom::bindings::utils::generic_call::h3cf5c8561aec2955
  12:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  13:     0x55621b9cd7f9 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:453
  14:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  15:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  16:     0x55621b9ce3fd - _ZN2js10CallGetterEP9JSContextN2JS6HandleINS2_5ValueEEES5_NS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:631
  17:     0x55621b9f13d8 - CallGetter
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/NativeObject.cpp:1737
  18:     0x55621b9f69bb - GetExistingProperty<(js::AllowGC)1>
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/NativeObject.cpp:1785
  19:     0x55621b9f6eed - NativeGetPropertyInline<(js::AllowGC)1>
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/NativeObject.cpp:2012
  20:     0x55621b9f1d11 - _ZN2js17NativeGetPropertyEP9JSContextN2JS6HandleIPNS_12NativeObjectEEENS3_INS2_5ValueEEENS3_I4jsidEENS2_13MutableHandleIS7_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/NativeObject.cpp:2046
  21:     0x55621b3d8d7c - _ZN2js11GetPropertyEP9JSContextN2JS6HandleIP8JSObjectEENS3_INS2_5ValueEEENS3_I4jsidEENS2_13MutableHandleIS7_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/NativeObject.h:1481
  22:     0x55621b52e8b6 - _ZN2js11GetPropertyEP9JSContextN2JS6HandleIP8JSObjectEENS3_INS2_5ValueEEEPNS_12PropertyNameENS2_13MutableHandleIS7_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsobj.h:831
  23:     0x55621b9e444f - _ZN2js11GetPropertyEP9JSContextN2JS6HandleINS2_5ValueEEENS3_IPNS_12PropertyNameEEENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:4161
  24:     0x55621b9cc00f - GetPropertyOperation
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:189
  25:     0x55621b9d89b8 - Interpret
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:2590
  26:     0x55621b9cd47b - _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:399
  27:     0x55621b9cd8c8 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:471
  28:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  29:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  30:     0x55621b7df7aa - _ZN2js9fun_applyEP9JSContextjPN2JS5ValueE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsfun.cpp:1325
  31:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  32:     0x55621b9cd7f9 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:453
  33:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  34:     0x55621b9cdb4a - _ZN2js13CallFromStackEP9JSContextRKN2JS8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:504
  35:     0x55621b9dab76 - Interpret
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:2873
  36:     0x55621b9cd47b - _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:399
  37:     0x55621b9cd8c8 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:471
  38:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  39:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  40:     0x55621b7df7aa - _ZN2js9fun_applyEP9JSContextjPN2JS5ValueE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsfun.cpp:1325
  41:     0x55621b9ff3a1 - _ZN2js12CallJSNativeEP9JSContextPFbS1_jPN2JS5ValueEERKNS2_8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jscntxtinlines.h:232
  42:     0x55621b9cd7f9 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:453
  43:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  44:     0x55621b9cdb4a - _ZN2js13CallFromStackEP9JSContextRKN2JS8CallArgsE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:504
  45:     0x55621b9dab76 - Interpret
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:2873
  46:     0x55621b9cd47b - _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:399
  47:     0x55621b9cd8c8 - _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:471
  48:     0x55621b9cdb20 - InternalCall
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:498
  49:     0x55621b9cdbb2 - _ZN2js4CallEP9JSContextN2JS6HandleINS2_5ValueEEES5_RKNS_13AnyInvokeArgsENS2_13MutableHandleIS4_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/vm/Interpreter.cpp:517
  50:     0x55621b737228 - _Z20JS_CallFunctionValueP9JSContextN2JS6HandleIP8JSObjectEENS2_INS1_5ValueEEERKNS1_16HandleValueArrayENS1_13MutableHandleIS6_EE
                        at /shared/dev/rust/servo/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/834ce35/mozjs/js/src/jsapi.cpp:2781
  51:     0x55621ae6662f - script::dom::bindings::codegen::Bindings::FunctionBinding::Function::Call::h9dccb24d0f9011c1
  52:     0x55621ab3086a - script::dom::globalscope::GlobalScope::fire_timer::h3742574d10a6110b
  53:     0x55621acf8409 - script::script_thread::ScriptThread::handle_msgs::{{closure}}::hdd3fd9041a1efa8f
  54:     0x55621acf48cf - script::script_thread::ScriptThread::handle_msgs::h4aadf07f4dff3bf3
  55:     0x55621acefceb - script::script_thread::ScriptThread::start::h543e6bc16496788a
  56:     0x55621a59f8f0 - std::sys_common::backtrace::__rust_begin_short_backtrace::hcbce24426485d7f2
  57:     0x55621a6cc605 - std::panicking::try::do_call::h8ef268d0617cbd63
  58:     0x55621c69ebcc - panic_unwind::__rust_maybe_catch_panic
                        at /checkout/src/libpanic_unwind/lib.rs:99
  59:     0x55621a8d60b2 - <F as alloc::boxed::FnBox<A>>::call_box::h4e198348b3252fbb
  60:     0x55621c6967ab - alloc::boxed::{{impl}}::call_once<(),()>
                        at /checkout/src/liballoc/boxed.rs:692
                         - std::sys_common::thread::start_thread
                        at /checkout/src/libstd/sys_common/thread.rs:21
                         - std::sys::imp::thread::{{impl}}::new::thread_start
                        at /checkout/src/libstd/sys/unix/thread.rs:84
  61:     0x7f0c10a23493 - start_thread
  62:     0x7f0c10550abe - __clone
  63:                0x0 - <unknown>
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@jdm jdm commented Sep 10, 2017

@cynicaldevil Interesting parser assertion failure in case you want to check it out.
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@cynicaldevil cynicaldevil commented Sep 10, 2017

Cool, I'll look into it.
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