index out of bounds: the len is 0 but the index is 0 (www.bbc.co.uk)

[alexgibson]

index out of bounds: the len is 0 but the index is 0

URL:

http://www.bbc.co.uk/news/live/uk-politics-36570120

Backtrace:

frame #0  - 0x00000001063766ce - backtrace::backtrace::trace::hccde8df28b4db2a2
frame #1  - 0x0000000106376651 - backtrace::capture::Backtrace::new::h42f95930bb8c5ee8
frame #2  - 0x0000000104be3ca4 - _<F as alloc..boxed..FnBox<A>>::call_box::haeff945be1a63d60
frame #3  - 0x00000001062ea947 - util::panicking::initiate_panic_hook::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h2c0e77c593c00c08
frame #4  - 0x000000010655e844 - std::panicking::rust_panic_with_hook::h983af77c1a2e581b
frame #5  - 0x0000000106577786 - std::panicking::begin_panic::he426e15a3766089a
frame #6  - 0x000000010655fe88 - std::panicking::begin_panic_fmt::hdddb415186c241e7
frame #7  - 0x00000001065773df - rust_begin_unwind
frame #8  - 0x000000010659e260 - core::panicking::panic_fmt::hf4e16cb7f0d41a25
frame #9  - 0x000000010659e3e0 - core::panicking::panic_bounds_check::h14f942e6ac026712
frame #10 - 0x0000000105919d5f - style::keyframes::KeyframesAnimation::from_keyframes::he442a72709c63fad
frame #11 - 0x0000000104c95263 - _<style..selector_matching..Stylist<Impl>>::add_stylesheet::h92b16ac9c7fcb28e
frame #12 - 0x0000000104c50062 - layout_thread::LayoutThread::handle_reflow::h6771f195a62bbc92
frame #13 - 0x0000000104c3cb6d - layout_thread::LayoutThread::handle_request_helper::h1029bbb7e9e50e59
frame #14 - 0x0000000104c21e9f - layout_thread::LayoutThread::handle_request::ha13841b9d3ecdc81
frame #15 - 0x0000000104be1b1a - std::panicking::try::call::h401e4a3a7768c3f1
frame #16 - 0x000000010657a46b - __rust_try
frame #17 - 0x000000010657a405 - __rust_maybe_catch_panic
frame #18 - 0x0000000104be2e84 - _<F as alloc..boxed..FnBox<A>>::call_box::h8169792cb3dac906
frame #19 - 0x0000000106575ee8 - std::sys::thread::Thread::new::thread_start::h9c883b6d445ece46
frame #20 - 0x00007fff8814899c - _pthread_body
frame #21 - 0x00007fff88148919 - _pthread_start

[Ms2ger]

Thanks for filing; this is #11999.