[INFO] fetching crate mqtt 0.1.4...
[INFO] testing mqtt-0.1.4 against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] extracting crate mqtt 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mqtt 0.1.4 on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mqtt 0.1.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mqtt 0.1.4
[INFO] tweaked toml for crates.io crate mqtt 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miow v0.1.5
[INFO] [stderr]   Downloaded mio v0.5.1
[INFO] [stderr]   Downloaded bytes v0.3.0
[INFO] [stderr]   Downloaded slab v0.1.3
[INFO] [stderr]   Downloaded quick-error v0.2.2
[INFO] [stderr]   Downloaded rotor v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db9e1be8ca69d5bd1aa98c8ea7dfe088d874bd47d1a7e9718b2e91cfd397474f
[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" "db9e1be8ca69d5bd1aa98c8ea7dfe088d874bd47d1a7e9718b2e91cfd397474f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db9e1be8ca69d5bd1aa98c8ea7dfe088d874bd47d1a7e9718b2e91cfd397474f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db9e1be8ca69d5bd1aa98c8ea7dfe088d874bd47d1a7e9718b2e91cfd397474f", kill_on_drop: false }`
[INFO] [stdout] db9e1be8ca69d5bd1aa98c8ea7dfe088d874bd47d1a7e9718b2e91cfd397474f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71e6c1c723883e4c1b33b341dd17fb3a7ca71ee799ef17025de0a79801b8a257
[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" "71e6c1c723883e4c1b33b341dd17fb3a7ca71ee799ef17025de0a79801b8a257", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling gimli v0.24.0
[INFO] [stderr]    Compiling bytes v0.3.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.19
[INFO] [stderr]    Compiling quick-error v0.2.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling miow v0.1.5
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling addr2line v0.15.2
[INFO] [stderr]    Compiling mio v0.5.1
[INFO] [stderr]    Compiling rotor v0.6.3
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling mqtt v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `keep_alive`
[INFO] [stdout]    --> src/client.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 |     keep_alive: Duration,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.94s
[INFO] running `Command { std: "docker" "inspect" "71e6c1c723883e4c1b33b341dd17fb3a7ca71ee799ef17025de0a79801b8a257", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71e6c1c723883e4c1b33b341dd17fb3a7ca71ee799ef17025de0a79801b8a257", kill_on_drop: false }`
[INFO] [stdout] 71e6c1c723883e4c1b33b341dd17fb3a7ca71ee799ef17025de0a79801b8a257
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee5374d79e222323957f215ac90435090ea8e65cdec7d9aa56c67e13c09438c5
[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" "ee5374d79e222323957f215ac90435090ea8e65cdec7d9aa56c67e13c09438c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling slab v0.4.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `keep_alive`
[INFO] [stdout]    --> src/client.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 |     keep_alive: Duration,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling mqtt v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `echo_client`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `examples/echo_client.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mqtt`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0432]: unresolved imports `bytes::ByteBuf`, `bytes::SliceBuf`
[INFO] [stdout]   --> examples/echo_server.rs:27:26
[INFO] [stdout]    |
[INFO] [stdout] 27 | use bytes::{Buf, BufMut, ByteBuf, SliceBuf};
[INFO] [stdout]    |                          ^^^^^^^  ^^^^^^^^ no `SliceBuf` in the root
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          no `ByteBuf` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> examples/echo_server.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | /     error_chain!{
[INFO] [stdout] 35 | |         types {
[INFO] [stdout] 36 | |             Error, ErrorKind, ResultExt, Result;
[INFO] [stdout] 37 | |         }
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | |         }
[INFO] [stdout] 51 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> examples/echo_server.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | /     error_chain!{
[INFO] [stdout] 35 | |         types {
[INFO] [stdout] 36 | |             Error, ErrorKind, ResultExt, Result;
[INFO] [stdout] 37 | |         }
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | |         }
[INFO] [stdout] 51 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `mio::Event::kind`: use Event::readiness()
[INFO] [stdout]    --> examples/echo_server.rs:123:62
[INFO] [stdout]     |
[INFO] [stdout] 123 | ...                   entry.get_mut().handle(event.kind(), poll)?;
[INFO] [stdout]     |                                                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `mio::Ready::is_hup`: use UnixReady instead
[INFO] [stdout]    --> examples/echo_server.rs:308:24
[INFO] [stdout]     |
[INFO] [stdout] 308 |             _ if ready.is_hup() => {
[INFO] [stdout]     |                        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `mio::Ready::none`: use Ready::empty instead
[INFO] [stdout]    --> examples/echo_server.rs:378:39
[INFO] [stdout]     |
[INFO] [stdout] 378 |                           _ => Ready::none(),
[INFO] [stdout]     |                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> examples/echo_server.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | /     error_chain!{
[INFO] [stdout] 35 | |         types {
[INFO] [stdout] 36 | |             Error, ErrorKind, ResultExt, Result;
[INFO] [stdout] 37 | |         }
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | |         }
[INFO] [stdout] 51 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Buf`
[INFO] [stdout]   --> examples/echo_server.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 | use bytes::{Buf, BufMut, ByteBuf, SliceBuf};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufMut`
[INFO] [stdout]   --> examples/echo_server.rs:27:18
[INFO] [stdout]    |
[INFO] [stdout] 27 | use bytes::{Buf, BufMut, ByteBuf, SliceBuf};
[INFO] [stdout]    |                  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/error.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / error_chain!{
[INFO] [stdout] 4  | |     foreign_links {
[INFO] [stdout] 5  | |         Fmt(::std::fmt::Error);
[INFO] [stdout] 6  | |         Io(::std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `keep_alive`
[INFO] [stdout]    --> src/client.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 |     keep_alive: Duration,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ee5374d79e222323957f215ac90435090ea8e65cdec7d9aa56c67e13c09438c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee5374d79e222323957f215ac90435090ea8e65cdec7d9aa56c67e13c09438c5", kill_on_drop: false }`
[INFO] [stdout] ee5374d79e222323957f215ac90435090ea8e65cdec7d9aa56c67e13c09438c5