called `Result::unwrap()` on an `Err` value: Error { repr: Custom(Custom { kind: Other, error: StringError("MPSC send failed") }) }

[t0k4rt]

called Result::unwrap() on an Err value: Error { repr: Custom(Custom { kind: Other, error: StringError("MPSC send failed") }) }

URL:

http://natron.fr/

Backtrace:

frame #0  - 0x0000000111b156ce - backtrace::backtrace::trace::hccde8df28b4db2a2
frame #1  - 0x0000000111b15651 - backtrace::capture::Backtrace::new::h42f95930bb8c5ee8
frame #2  - 0x0000000110382ca4 - _<F as alloc..boxed..FnBox<A>>::call_box::haeff945be1a63d60
frame #3  - 0x0000000111a89947 - util::panicking::initiate_panic_hook::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h2c0e77c593c00c08
frame #4  - 0x0000000111cfd844 - std::panicking::rust_panic_with_hook::h983af77c1a2e581b
frame #5  - 0x0000000111d16786 - std::panicking::begin_panic::he426e15a3766089a
frame #6  - 0x0000000111cfee88 - std::panicking::begin_panic_fmt::hdddb415186c241e7
frame #7  - 0x0000000111d163df - rust_begin_unwind
frame #8  - 0x0000000111d3d260 - core::panicking::panic_fmt::hf4e16cb7f0d41a25
frame #9  - 0x000000011037438e - core::result::unwrap_failed::hf40cb93f6f31ec3d
frame #10 - 0x00000001103f1e0f - layout_thread::LayoutThread::exit_now::h9c02213ba81aad74
frame #11 - 0x00000001103d53a3 - layout_thread::LayoutThread::handle_request_helper::h1029bbb7e9e50e59
frame #12 - 0x00000001103c0f1a - layout_thread::LayoutThread::handle_request::ha13841b9d3ecdc81
frame #13 - 0x0000000110380b1a - std::panicking::try::call::h401e4a3a7768c3f1
frame #14 - 0x0000000111d1946b - __rust_try
frame #15 - 0x0000000111d19405 - __rust_maybe_catch_panic
frame #16 - 0x0000000110381e84 - _<F as alloc..boxed..FnBox<A>>::call_box::h8169792cb3dac906
frame #17 - 0x0000000111d14ee8 - std::sys::thread::Thread::new::thread_start::h9c883b6d445ece46
frame #18 - 0x00007fff8b30c99c - _pthread_body
frame #19 - 0x00007fff8b30c919 - _pthread_start

[jdm]

Curious; in a debug build on mac I see completely garbage rendering (a flickering window filled with portions of existing video memory), and then I get a SIGPIPE presumably triggered by this backtrace:

(lldb) bt
error: need to add support for DW_TAG_base_type '()' encoded with DW_ATE = 0x7, bit_size = 0
* thread #64: tid = 0xfb06, 0x000000010416cea5 servo`core::ptr::write<u8>(dst=0x000000011b057000, src='\0') + 21 at ptr.rs:187
  * frame #0: 0x000000010416cea5 servo`core::ptr::write<u8>(dst=0x000000011b057000, src='\0') + 21 at ptr.rs:187
    frame #1: 0x000000010416cb53 servo`collections::vec::{{impl}}::extend_from_slice<u8>(self=0x00000001296085f8, other=&[u8] at 0x0000000129607cc8) + 339 at vec.rs:997
    frame #2: 0x0000000104173733 servo`std::io::impls::{{impl}}::write_all(self=0x00000001296085f8, buf=&[u8] at 0x0000000129607d08) + 51 at impls.rs:220
    frame #3: 0x00000001041735aa servo`byteorder::new::WriteBytesExt::write_u32<collections::vec::Vec<u8>,byteorder::BigEndian>(self=0x00000001296085f8, n=0) + 138 at new.rs:191
    frame #4: 0x0000000104173360 servo`bincode::serde::writer::{{impl}}::serialize_u32<collections::vec::Vec<u8>>(self=0x0000000129608320, v=0) + 48 at writer.rs:108
    frame #5: 0x0000000104173320 servo`bincode::serde::writer::{{impl}}::add_enum_tag<collections::vec::Vec<u8>>(self=0x0000000129608320, tag=0) + 112 at writer.rs:86
    frame #6: 0x000000010417383b servo`bincode::serde::writer::{{impl}}::serialize_tuple_variant<collections::vec::Vec<u8>,core::option::Option<&core::result::Result<net_traits::Metadata, net_traits::NetworkError>>>(self=0x0000000129608320, _name=&str at 0x0000000129607f88, variant_index=0, _variant=&str at 0x0000000129607f70, visitor=Option<&core::result::Result<net_traits::Metadata, net_traits::NetworkError>> at 0x0000000129607f68) + 91 at writer.rs:243
    frame #7: 0x00000001041737d5 servo`serde::ser::Serializer::serialize_newtype_variant<bincode::serde::writer::Serializer<collections::vec::Vec<u8>>,&core::result::Result<net_traits::Metadata, net_traits::NetworkError>>(self=0x0000000129608320, name=&str at 0x0000000129607ff8, variant_index=0, variant=&str at 0x0000000129607fe0, value=0x0000000129608630) + 101 at mod.rs:187
    frame #8: 0x000000010417fd1b servo`net_traits::_IMPL_SERIALIZE_FOR_ResponseAction::{{impl}}::serialize<bincode::serde::writer::Serializer<collections::vec::Vec<u8>>>(self=0x0000000129608628, _serializer=0x0000000129608320) + 235 at lib.rs:252
    frame #9: 0x000000010417f877 servo`_$LT$ipc_channel..ipc..IpcSender$LT$T$GT$$GT$::send::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h2d3bb047da67cbcc + 823
    frame #10: 0x000000010417f524 servo`std::thread::local::{{impl}}::with<core::cell::RefCell<collections::vec::Vec<ipc_channel::platform::macos::MachSharedMemory>>,closure,core::result::Result<(self=0x00000001060820e0, f=closure at 0x0000000129608498), std::io::error::Error>> + 244 at local.rs:211
    frame #11: 0x000000010417f41c servo`_$LT$ipc_channel..ipc..IpcSender$LT$T$GT$$GT$::send::_$u7b$$u7b$closure$u7d$$u7d$::hc6ecbfaf775ba6d8 + 76
    frame #12: 0x000000010417f3b8 servo`std::thread::local::{{impl}}::with<core::cell::RefCell<collections::vec::Vec<ipc_channel::platform::macos::MachChannel>>,closure,core::result::Result<(self=0x00000001060820d0, f=closure at 0x0000000129608580), std::io::error::Error>> + 216 at local.rs:211
    frame #13: 0x000000010417f1b1 servo`ipc_channel::ipc::{{impl}}::send<net_traits::ResponseAction>(self=0x000000012960915c, data=ResponseAction at 0x0000000129608628) + 161 at ipc.rs:145
    frame #14: 0x000000010417ee22 servo`net_traits::{{impl}}::invoke_with_listener(self=0x000000012960915c, action=ResponseAction at 0x0000000129608908) + 162 at lib.rs:295
    frame #15: 0x00000001006ef29a servo`net::resource_thread::start_sending_opt(start_chan=LoadConsumer at 0x0000000129609158, metadata=Metadata at 0x0000000129609030, network_error=Option<net_traits::NetworkError> at 0x0000000129608fb0) + 1386 at resource_thread.rs:165
    frame #16: 0x00000001004b9132 servo`net::resource_thread::send_error(url=Url at 0x0000000129609680, err=NetworkError at 0x0000000129609608, start_chan=LoadConsumer at 0x00000001296095f8) + 674 at resource_thread.rs:91
    frame #17: 0x00000001005b7f28 servo`net::http_loader::load_for_consumer(load_data=LoadData at 0x000000012960a350, start_chan=LoadConsumer at 0x000000012960a340, classifier=Arc<net::mime_classifier::MIMEClassifier> at 0x000000012960a338, connector=Arc<hyper::client::pool::Pool<hyper::net::HttpsConnector<net::connector::ServoSslClient, hyper::net::HttpConnector>>> at 0x000000012960a328, http_state=HttpState at 0x000000012960a300, devtools_chan=Option<std::sync::mpsc::Sender<devtools_traits::DevtoolsControlMsg>> at 0x000000012960a2e0, cancel_listener=CancellationListener at 0x000000012960a2a8, user_agent=String at 0x000000012960a290) + 2200 at http_loader.rs:151
    frame #18: 0x00000001005b7592 servo`net::http_loader::factory::{{closure}}::{{closure}}::{{closure}} + 818 at http_loader.rs:75
    frame #19: 0x00000001005b707c servo`profile_traits::time::profile<(category=NetHTTPRequestResponse, meta=Option<profile_traits::time::TimerMetadata> at 0x000000012960adf8, profiler_chan=ProfilerChan at 0x000000012960adf0, callback=closure at 0x000000012960ab80),closure> + 300 at time.rs:108
    frame #20: 0x00000001005b6606 servo`net::http_loader::factory::{{closure}}::{{closure}} + 1030 at http_loader.rs:74
    frame #21: 0x00000001005b61a8 servo`std::panic::{{impl}}::call_once<(self=AssertUnwindSafe<closure> at 0x000000012960b480, _args=<unavailable>),closure> + 136 at panic.rs:251
    frame #22: 0x00000001005b60fc servo`std::panicking::try::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hda7091a686dadbc5 + 92
    frame #23: 0x00000001005b6c35 servo`std::panicking::try::call<closure>(f=0x000000012960bce8) + 21 at panicking.rs:272
    frame #24: 0x00000001048ff3ac servo`__rust_try + 12
    frame #25: 0x00000001048ff346 servo`__rust_maybe_catch_panic + 38
    frame #26: 0x00000001005b604e servo`std::panicking::try::_$u7b$$u7b$closure$u7d$$u7d$::h0471fbc18f57695a + 158
    frame #27: 0x00000001005b5fa0 servo`std::thread::local::{{impl}}::with<core::cell::Cell<usize>,closure,core::result::Result<(self=0x00000001060fa6a0, f=closure at 0x000000012960bd88), Box<Any>>> + 208 at local.rs:211
    frame #28: 0x00000001005b5dd0 servo`std::panicking::try<(f=AssertUnwindSafe<closure> at 0x000000012960c0b0),std::panic::AssertUnwindSafe<closure>> + 192 at panicking.rs:235
    frame #29: 0x00000001005b5caf servo`std::panic::catch_unwind<std::panic::AssertUnwindSafe<closure>,(f=AssertUnwindSafe<closure> at 0x000000012960c5e0)> + 143 at panic.rs:307
    frame #30: 0x00000001005b5b0d servo`std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::hcb830a167795e6ca + 349
    frame #31: 0x00000001005b6e38 servo`alloc::boxed::{{impl}}::call_box<(self=0x000000011c432280, args=<unavailable>),closure> + 104 at boxed.rs:544
    frame #32: 0x00000001048fae29 servo`std::sys::thread::Thread::new::thread_start::h9c883b6d445ece46 + 57
    frame #33: 0x00007fff8a6bd899 libsystem_pthread.dylib`_pthread_body + 138
    frame #34: 0x00007fff8a6bd72a libsystem_pthread.dylib`_pthread_start + 137
    frame #35: 0x00007fff8a6c1fc9 libsystem_pthread.dylib`thread_start + 13

[nox]

This doesn't happen anymore.