Random startup crash

gistfile1.txt

(gdb) bt
#0  0x000000000049ac0b in sync::atomics::atomic_store::h05a0c6a14b8e9ba0a8::v0.0 ()
#1  0x000000000049ab7e in sync::atomics::AtomicPtr::store::h4b80349701d2f01eiOa7::v0.0 ()
#2  0x000000000049a61f in sync::mpsc_queue::State::push::h2c8a10f05faa18bd2uaW::v0.0 ()
#3  0x000000000049a3b4 in sync::mpsc_queue::Producer::push::hc6e3a1a3114eaecdveaV::v0.0 ()
#4  0x000000000049a04e in comm::SharedChan::try_send::h13a809ebcc71cdf9oCaR::v0.0 ()
#5  0x0000000000499d55 in comm::SharedChan::send::hfd7dfe121ee18600oCaQ::v0.0 ()
    at /home/larsberg/servo-jack/src/components/main/compositing/compositor_task.rs:44
#6  0x0000000000499b88 in servo::compositing::ScriptListener$CompositorChan::set_ready_state (self=0x7fa780204050, 
    ready_state=FinishedLoading) at /home/larsberg/servo-jack/src/components/main/compositing/compositor_task.rs:44
#7  0x00007fa79112bc40 in script::script_task::ScriptTask::handle_reflow_complete_msg (self=0x7fa78028acf0, 
    pipeline_id=..., reflow_id=1) at /home/larsberg/servo-jack/src/components/script/script_task.rs:608
#8  0x00007fa79111f651 in script::script_task::ScriptTask::handle_msgs (self=0x7fa78028acf0)
    at /home/larsberg/servo-jack/src/components/script/script_task.rs:543
#9  0x00007fa79111e747 in script::script_task::ScriptTask::start (self=0x7fa78028acf0)
    at /home/larsberg/servo-jack/src/components/script/script_task.rs:462
#10 0x0000000000545edf in script_task::ScriptTask::create::anon::expr_fn::Lkanao ()
    at /home/larsberg/servo-jack/src/components/main/pipeline.rs:119
#11 0x00007fa795cb81b8 in task::__extensions__::build_start_wrapper::anon::anon::expr_fn::a1 ()
   from /home/larsberg/servo-jack/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/lib/rustc/x86_64-unknown-linux-gnu/lib/libgreen-83b1c0e5-0.9.so
#12 0x00007fa795ffe3f8 in rt::task::__extensions__::run::anon::expr_fn::av ()
   from /home/larsberg/servo-jack/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-3e5aeb83-0.9.so
#13 0x00007fa79600594c in rust_try ()
   from /home/larsberg/servo-jack/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-3e5aeb83-0.9.so
#14 0x00007fa795ffe19d in rt::task::Task::run::hf7663b6e52130dcb3aar::v0.9 ()
   from /home/larsberg/servo-jack/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-3e5aeb83-0.9.so
#15 0x00007fa795cb7bdc in task::__extensions__::build_start_wrapper::anon::expr_fn::aK ()
   from /home/larsberg/servo-jack/build/x86_64-unknown-linux-gnu/src/compiler/rust/x86_64-unknown-linux-gnu/stage2/lib/rustc/x86_64-unknown-linux-gnu/lib/libgreen-83b1c0e5-0.9.so
#16 0x0000000000000000 in ?? ()