[INFO] fetching crate engine_io_warp 0.1.0...
[INFO] testing engine_io_warp-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate engine_io_warp 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate engine_io_warp 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate engine_io_warp 0.1.0
[INFO] finished tweaking crates.io crate engine_io_warp 0.1.0
[INFO] tweaked toml for crates.io crate engine_io_warp 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6957a01d9334a2c9c477a919dfdfd38dfb5422f531aed4ffd253ea5e5b30a35a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6957a01d9334a2c9c477a919dfdfd38dfb5422f531aed4ffd253ea5e5b30a35a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6957a01d9334a2c9c477a919dfdfd38dfb5422f531aed4ffd253ea5e5b30a35a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6957a01d9334a2c9c477a919dfdfd38dfb5422f531aed4ffd253ea5e5b30a35a", kill_on_drop: false }`
[INFO] [stdout] 6957a01d9334a2c9c477a919dfdfd38dfb5422f531aed4ffd253ea5e5b30a35a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad5636a11b5e1816790eddf8b9583d8b2d0513a9e71e33e478af80f2403768b4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ad5636a11b5e1816790eddf8b9583d8b2d0513a9e71e33e478af80f2403768b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]    Compiling urlencoding v1.3.3
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling input_buffer v0.3.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling sha-1 v0.9.7
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling headers v0.3.4
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tungstenite v0.11.1
[INFO] [stderr]    Compiling multipart v0.17.1
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling pin-project v1.0.8
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling pin-project v0.4.28
[INFO] [stderr]    Compiling engine_io_parser v0.2.0
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling futures-executor v0.3.16
[INFO] [stderr]    Compiling futures v0.3.16
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tungstenite v0.11.0
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling engine_io_server v0.1.0
[INFO] [stderr]    Compiling hyper v0.13.10
[INFO] [stderr]    Compiling warp v0.2.5
[INFO] [stderr]    Compiling engine_io_warp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `engine_io_parser::binary::decoder as binaryDecoder`
[INFO] [stdout]   --> src/polling.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use engine_io_parser::binary::decoder as binaryDecoder;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `engine_io_parser::string::decoder as stringDecoder`
[INFO] [stdout]   --> src/polling.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use engine_io_parser::string::decoder as stringDecoder;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CACHE_CONTROL`
[INFO] [stdout]   --> src/polling.rs:15:39
[INFO] [stdout]    |
[INFO] [stdout] 15 | use warp::http::header::{HeaderValue, CACHE_CONTROL, CONTENT_TYPE};
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Message`
[INFO] [stdout]   --> src/adapter_warp.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 | use warp::ws::{Message, WebSocket, Ws};
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal compiler error: unexpected concrete region in borrowck: ReStatic
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.2.5/src/filters/sse.rs:457:5
[INFO] [stdout]     |
[INFO] [stdout] 457 | /     pub fn stream<S>(
[INFO] [stdout] 458 | |         self,
[INFO] [stdout] 459 | |         event_stream: S,
[INFO] [stdout] 460 | |     ) -> impl TryStream<
[INFO] [stdout] ...   |
[INFO] [stdout] 476 | |         }
[INFO] [stdout] 477 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: delayed at compiler/rustc_mir/src/borrow_check/region_infer/opaque_types.rs:87:44
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1050:13
[INFO] [stdout] error: internal compiler error: unexpected concrete region in borrowck: ReStatic
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.2.5/src/filters/sse.rs:492:1
[INFO] [stdout]     |
[INFO] [stdout] 492 | / pub fn keep<S>(
[INFO] [stdout] 493 | |     event_stream: S,
[INFO] [stdout] 494 | |     keep_interval: impl Into<Option<Duration>>,
[INFO] [stdout] 495 | | ) -> impl TryStream<
[INFO] [stdout] ...   |
[INFO] [stdout] 514 | |     }
[INFO] [stdout] 515 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: delayed at compiler/rustc_mir/src/borrow_check/region_infer/opaque_types.rs:87:44
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x7f5b7cc23b00 - std::backtrace_rs::backtrace::libunwind::trace::hff4d1766e93f64f1
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]    1:     0x7f5b7cc23b00 - std::backtrace_rs::backtrace::trace_unsynchronized::h56bbc8eb78770bcb
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]    2:     0x7f5b7cc23b00 - std::sys_common::backtrace::_print_fmt::h5c8e75464faca780
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]    3:     0x7f5b7cc23b00 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48b88277def8b362
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]    4:     0x7f5b7cc9163c - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/fmt/mod.rs:1115:17
[INFO] [stderr]    5:     0x7f5b7cc153e5 - std::io::Write::write_fmt::hd42607e5d8e44db0
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/io/mod.rs:1665:15
[INFO] [stderr]    6:     0x7f5b7cc2781b - std::sys_common::backtrace::_print::ha537687d6c17dd0d
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]    7:     0x7f5b7cc2781b - std::sys_common::backtrace::print::h61376ae57d131d72
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]    8:     0x7f5b7cc2781b - std::panicking::default_hook::{{closure}}::h0f7208c0b9644a54
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:208:50
[INFO] [stderr]    9:     0x7f5b7cc272f1 - std::panicking::default_hook::hdac7fc06578c14ce
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:225:9
[INFO] [stdout] warning: unused variable: `context`
[INFO] [stdout]    --> src/polling.rs:128:39
[INFO] [stdout]     |
[INFO] [stdout] 128 | fn respond(content: ResponseBodyData, context: &RequestContext, compress: bool) -> AdapterResponse {
[INFO] [stdout]     |                                       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_context`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `compress`
[INFO] [stdout]    --> src/polling.rs:128:65
[INFO] [stdout]     |
[INFO] [stdout] 128 | fn respond(content: ResponseBodyData, context: &RequestContext, compress: bool) -> AdapterResponse {
[INFO] [stdout]     |                                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compress`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `request_context`
[INFO] [stdout]   --> src/polling.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |         request_context: &RequestContext,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `request_context`
[INFO] [stdout]   --> src/polling.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |         request_context: &RequestContext,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `request_context`
[INFO] [stdout]    --> src/polling.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         request_context: &RequestContext,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `packets`
[INFO] [stdout]   --> src/polling.rs:45:30
[INFO] [stdout]    |
[INFO] [stdout] 45 |     async fn send(&mut self, packets: Vec<Packet>) {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_packets`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set_cookie`
[INFO] [stdout]    --> src/adapter_warp.rs:155:41
[INFO] [stdout]     |
[INFO] [stdout] 155 | ...                   if let Some(set_cookie) = result.set_cookie {
[INFO] [stdout]     |                                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_set_cookie`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]    --> src/adapter_warp.rs:163:29
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         Err(error) => Ok(warp::reply::html("asdf".to_owned())),
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   10:     0x7f5b7d401531 - rustc_driver::DEFAULT_HOOK::{{closure}}::{{closure}}::he0fb23ee363efe57
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/adapter_warp.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |         let data = path::path(path)
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `connection_id`
[INFO] [stdout]    --> src/adapter_warp.rs:187:47
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     ServerEvent::Connection { connection_id } => {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^ help: try ignoring the field: `connection_id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `connection_id`
[INFO] [stdout]    --> src/adapter_warp.rs:190:42
[INFO] [stdout]     |
[INFO] [stdout] 190 |                     ServerEvent::Flush { connection_id } => {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^ help: try ignoring the field: `connection_id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `connection_id`
[INFO] [stdout]    --> src/adapter_warp.rs:193:42
[INFO] [stdout]     |
[INFO] [stdout] 193 |                     ServerEvent::Drain { connection_id } => {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^ help: try ignoring the field: `connection_id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `connection_id`
[INFO] [stdout]    --> src/adapter_warp.rs:197:25
[INFO] [stdout]     |
[INFO] [stdout] 197 |                         connection_id,
[INFO] [stdout]     |                         ^^^^^^^^^^^^^ help: try ignoring the field: `connection_id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/adapter_warp.rs:198:25
[INFO] [stdout]     |
[INFO] [stdout] 198 |                         data,
[INFO] [stdout]     |                         ^^^^ help: try ignoring the field: `data: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sid`
[INFO] [stdout]    --> src/adapter_warp.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         sid: &str,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_sid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sid`
[INFO] [stdout]    --> src/adapter_warp.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         sid: &str,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_sid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `packets`
[INFO] [stdout]   --> src/websocket.rs:29:30
[INFO] [stdout]    |
[INFO] [stdout] 29 |     async fn send(&mut self, packets: Vec<Packet>) {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_packets`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `request_context`
[INFO] [stdout]   --> src/websocket.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |         request_context: &RequestContext,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   11:     0x7f5b6e97d633 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h962a6d344ff3157a
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1586:9
[INFO] [stderr]   12:     0x7f5b6e96a2ba - proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}::h4dec903207d3ec86
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/proc_macro/src/bridge/client.rs:320:21
[INFO] [stderr]   13:     0x7f5b7cc28049 - std::panicking::rust_panic_with_hook::h72b21c283da3d1ef
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:626:17
[INFO] [stderr]   14:     0x7f5b7cc27b07 - std::panicking::begin_panic_handler::{{closure}}::he5778f1729cff84a
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:519:13
[INFO] [stderr]   15:     0x7f5b7cc23fdc - std::sys_common::backtrace::__rust_end_short_backtrace::h2d11ca8b453b4b1d
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]   16:     0x7f5b7cc27a69 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:515:5
[INFO] [stderr]   17:     0x7f5b7cbf0a6b - std::panicking::begin_panic_fmt::h746518bde832d259
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:457:5
[INFO] [stderr]   18:     0x7f5b7f8651a9 - rustc_errors::HandlerInner::flush_delayed::h68abfe220c70dca1
[INFO] [stderr]   19:     0x7f5b7f863c0d - <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop::hd769a4292ac9bfa2
[INFO] [stderr]   20:     0x7f5b7ef188d6 - core::ptr::drop_in_place<rustc_session::parse::ParseSess>::h3c16055fae7b64de
[INFO] [stderr]   21:     0x7f5b7ef1aa1e - <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::ha02c0db4efb40d0e
[INFO] [stderr]   22:     0x7f5b7eeefcfd - core::ptr::drop_in_place<rustc_interface::interface::Compiler>::h4b986457436dbab5
[INFO] [stderr]   23:     0x7f5b7eeef2e3 - rustc_span::with_source_map::h46995da78fbfb2ca
[INFO] [stderr]   24:     0x7f5b7ef00bca - rustc_interface::interface::create_compiler_and_run::hdd0d8e5ea2028f60
[INFO] [stderr]   25:     0x7f5b7eef3c49 - scoped_tls::ScopedKey<T>::set::h4889fb0c1fafdd05
[INFO] [stderr]   26:     0x7f5b7eef066a - std::sys_common::backtrace::__rust_begin_short_backtrace::h78e9a1a2353d1913
[INFO] [stderr]   27:     0x7f5b7eeefab5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb838edfbc6ca2ea1
[INFO] [stderr]   28:     0x7f5b7cc345d7 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h65c29e4642be2358
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stderr]   29:     0x7f5b7cc345d7 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd0f8f7fbbd9fffbf
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stderr]   30:     0x7f5b7cc345d7 - std::sys::unix::thread::Thread::new::thread_start::h2fd22fee3ca77b65
[INFO] [stderr]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys/unix/thread.rs:74:17
[INFO] [stderr]   31:     0x7f5b7cb50609 - start_thread
[INFO] [stderr]   32:     0x7f5b7ca64293 - clone
[INFO] [stderr]   33:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] error: internal compiler error: unexpected panic
[INFO] [stderr] 
[INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug.
[INFO] [stderr] 
[INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.55.0-beta.3 (53fd98ca7 2021-07-31) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: -C embed-bitcode=no -C debuginfo=2 --crate-type lib
[INFO] [stderr] 
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
[INFO] [stderr] 
[INFO] [stderr] query stack during panic:
[INFO] [stderr] end of query stack
[INFO] [stderr] error: could not compile `warp`
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/polling.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         self.event_sender.send(TransportEvent::Close).await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ad5636a11b5e1816790eddf8b9583d8b2d0513a9e71e33e478af80f2403768b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad5636a11b5e1816790eddf8b9583d8b2d0513a9e71e33e478af80f2403768b4", kill_on_drop: false }`
[INFO] [stdout] ad5636a11b5e1816790eddf8b9583d8b2d0513a9e71e33e478af80f2403768b4
