→ ./mach run https://codepen.io/davidkpiano/pen/aNKxeo
assertion failed: `(left == right)`
  left: `2`,
 right: `1`: This runtime still has live children. (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(2), index: PipelineIndex(3) }, at /Users/cybai/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/92136c0/src/rust.rs:371)
stack backtrace:
   0: backtrace::backtrace::trace_unsynchronized::h40e4195d9ed0871f (0x10ab0769d)
   1: backtrace::backtrace::trace::h91e46b16eaa624ee (0x10ab07623)
   2: backtrace::capture::Backtrace::create::hbfce518757b8ffcb (0x10aaf6297)
   3: backtrace::capture::Backtrace::new::hb9268a49cde77588 (0x10aaf61d6)
   4: servo::main::{{closure}}::h02bf8385eaabe81f (0x102f77aa2)
   5: std::panicking::rust_panic_with_hook::h099fe3773ce1a793 (0x10b2a45f2)
   6: std::panicking::continue_panic_fmt::h8a4b76634870b383 (0x10b2a405d)
   7: std::panicking::begin_panic_fmt::hd8effa78bdafa918 (0x10b2a3fbe)
   8: <mozjs::rust::Runtime as core::ops::drop::Drop>::drop::ha77e6fc5bb2ad588 (0x106cd4b7a)
   9: core::ptr::real_drop_in_place::h131afef99a7c5ff4 (0x104ceae05)
  10: core::ptr::real_drop_in_place::h9af35cbe64f80de5 (0x104d55097)
  11: core::ptr::real_drop_in_place::hbf5bfabd356df2d2 (0x104d71fbe)
  12: <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::hf3b449128d421963 (0x1058b2c8e)
  13: core::ptr::real_drop_in_place::h5afdeb3415187ccc (0x104d236d5)
  14: core::ptr::real_drop_in_place::h46c90f9a53db27e5 (0x104d141de)
  15: <script::script_thread::ScriptThread as script_traits::ScriptThreadFactory>::create::{{closure}}::hdfdac7e64255f05b (0x106347b1d)
  16: std::sys_common::backtrace::__rust_begin_short_backtrace::h042b2ce54b0f5bed (0x103ed0253)
  17: std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h80b0f5a81ea723de (0x1069bbfe3)
  18: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h7d69a1ef1908ebf7 (0x104ad4e43)
  19: std::panicking::try::do_call::h64eb6f0b577f6c7a (0x104a2c505)
  20: __rust_maybe_catch_panic (0x10b2ac9af)
  21: std::panicking::try::h2b5c1fedeff81527 (0x10483d6d5)
  22: std::panic::catch_unwind::h86f80d6d3cdb7d12 (0x104b2af53)
  23: std::thread::Builder::spawn_unchecked::{{closure}}::h4248ae127b2483cb (0x1069bab2c)
  24: core::ops::function::FnOnce::call_once{{vtable.shim}}::h7ec2ee8ea567f224 (0x104c7d875)
  25: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hb03304ace7f89c63 (0x10b293b4e)
  26: std::sys::unix::thread::Thread::new::thread_start::hd2d570f25bb299f3 (0x10b2abebe)
  27: _pthread_body (0x7fff734b92eb)
  28: _pthread_start (0x7fff734bc249)
[2019-09-10T04:53:34Z ERROR servo] assertion failed: `(left == right)`
  left: `2`,
 right: `1`: This runtime still has live children.
^CServo exited with return value -2