[INFO] fetching crate devp2p 0.4.1...
[INFO] checking devp2p-0.4.1 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate devp2p 0.4.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate devp2p 0.4.1 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate devp2p 0.4.1
[INFO] finished tweaking crates.io crate devp2p 0.4.1
[INFO] tweaked toml for crates.io crate devp2p 0.4.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded digest v0.6.2
[INFO] [stderr]   Downloaded hmac-drbg v0.1.2
[INFO] [stderr]   Downloaded libsecp256k1 v0.1.15
[INFO] [stderr]   Downloaded blockchain v0.2.0
[INFO] [stderr]   Downloaded ethereum-bloom v0.2.1
[INFO] [stderr]   Downloaded ethereum-block-core v0.1.0
[INFO] [stderr]   Downloaded hmac v0.4.2
[INFO] [stderr]   Downloaded rlpx v0.4.1
[INFO] [stderr]   Downloaded ethereum-block v0.3.5
[INFO] [stderr]   Downloaded ethereum-bigint v0.2.9
[INFO] [stderr]   Downloaded ethereum-rlp v0.2.3
[INFO] [stderr]   Downloaded block-buffer v0.2.0
[INFO] [stderr]   Downloaded ethereum-hexutil v0.2.3
[INFO] [stderr]   Downloaded tokio-timer-plus v0.1.3
[INFO] [stderr]   Downloaded generic-array v0.8.3
[INFO] [stderr]   Downloaded sha2 v0.6.0
[INFO] [stderr]   Downloaded crypto-mac v0.4.0
[INFO] [stderr]   Downloaded sha3 v0.6.0
[INFO] [stderr]   Downloaded dpt v0.3.1
[INFO] [stderr]   Downloaded ethereum-trie v0.3.8
[INFO] [stderr]   Downloaded elastic-array-plus v0.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c780024a753605703fc35f7899aacec48c4b306f216037801604c8c061be9b57
[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" "c780024a753605703fc35f7899aacec48c4b306f216037801604c8c061be9b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c780024a753605703fc35f7899aacec48c4b306f216037801604c8c061be9b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c780024a753605703fc35f7899aacec48c4b306f216037801604c8c061be9b57", kill_on_drop: false }`
[INFO] [stdout] c780024a753605703fc35f7899aacec48c4b306f216037801604c8c061be9b57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a69b2897e68f546a84819e14d31959b6fdc7fe9127375250ef369c644e6ce10e
[INFO] running `Command { std: "docker" "start" "-a" "a69b2897e68f546a84819e14d31959b6fdc7fe9127375250ef369c644e6ce10e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking ethereum-hexutil v0.2.3
[INFO] [stderr]     Checking elastic-array-plus v0.9.1
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking blockchain v0.2.0
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking generic-array v0.8.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking digest v0.6.2
[INFO] [stderr]     Checking block-buffer v0.2.0
[INFO] [stderr]     Checking crypto-mac v0.4.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking hmac v0.4.2
[INFO] [stderr]     Checking sha3 v0.6.0
[INFO] [stderr]     Checking sha2 v0.6.0
[INFO] [stderr]     Checking hmac-drbg v0.1.2
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking ethereum-rlp v0.2.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]     Checking tokio-timer-plus v0.1.3
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking libsecp256k1 v0.1.15
[INFO] [stderr]     Checking ethereum-bigint v0.2.9
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking ethereum-trie v0.3.8
[INFO] [stderr]     Checking ethereum-block-core v0.1.0
[INFO] [stderr]     Checking ethereum-bloom v0.2.1
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking ethereum-block v0.3.5
[INFO] [stderr]     Checking dpt v0.3.1
[INFO] [stderr]     Checking rlpx v0.4.1
[INFO] [stderr]     Checking devp2p v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `future`
[INFO] [stdout]  --> src/raw.rs:9:61
[INFO] [stdout]   |
[INFO] [stdout] 9 | use futures::{StartSend, Async, Poll, Stream, Sink, Future, future};
[INFO] [stdout]   |                                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decodable`
[INFO] [stdout]  --> src/eth/proto.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rlp::{Encodable, Decodable, RlpStream, DecoderError, UntrustedRlp};
[INFO] [stdout]   |                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Address`, `B256`, `Gas`
[INFO] [stdout]  --> src/eth/proto.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | use bigint::{Address, Gas, H256, U256, B256};
[INFO] [stdout]   |              ^^^^^^^  ^^^              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DecoderError`, `Encodable`, `RlpStream`
[INFO] [stdout]    --> src/eth/proto.rs:196:21
[INFO] [stdout]     |
[INFO] [stdout] 196 |     use rlp::{self, Encodable, Decodable, RlpStream, DecoderError, UntrustedRlp};
[INFO] [stdout]     |                     ^^^^^^^^^             ^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `future`
[INFO] [stdout]  --> src/eth/mod.rs:3:72
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{StartSend, Async, Poll, Stream, Sink, AsyncSink, Future, future};
[INFO] [stdout]   |                                                                        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> src/eth/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `future`
[INFO] [stdout]  --> src/raw.rs:9:61
[INFO] [stdout]   |
[INFO] [stdout] 9 | use futures::{StartSend, Async, Poll, Stream, Sink, Future, future};
[INFO] [stdout]   |                                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decodable`
[INFO] [stdout]  --> src/eth/proto.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rlp::{Encodable, Decodable, RlpStream, DecoderError, UntrustedRlp};
[INFO] [stdout]   |                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Address`, `B256`, `Gas`
[INFO] [stdout]  --> src/eth/proto.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | use bigint::{Address, Gas, H256, U256, B256};
[INFO] [stdout]   |              ^^^^^^^  ^^^              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `future`
[INFO] [stdout]  --> src/eth/mod.rs:3:72
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{StartSend, Async, Poll, Stream, Sink, AsyncSink, Future, future};
[INFO] [stdout]   |                                                                        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> src/eth/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/raw.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 96  | /         loop {
[INFO] [stdout] 97  | |             match result {
[INFO] [stdout] 98  | |                 Async::NotReady => return Ok(Async::Ready(())),
[INFO] [stdout] 99  | |                 Async::Ready(()) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |             }
[INFO] [stdout] 122 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 125 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/raw.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 131 | /         loop {
[INFO] [stdout] 132 | |             match result {
[INFO] [stdout] 133 | |                 Async::NotReady => return Ok(Async::Ready(())),
[INFO] [stdout] 134 | |                 Async::Ready(()) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 142 | |             }
[INFO] [stdout] 143 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 144 | 
[INFO] [stdout] 145 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decodable`
[INFO] [stdout]    --> src/eth/proto.rs:196:32
[INFO] [stdout]     |
[INFO] [stdout] 196 |     use rlp::{self, Encodable, Decodable, RlpStream, DecoderError, UntrustedRlp};
[INFO] [stdout]     |                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Future`
[INFO] [stdout]  --> src/eth/mod.rs:3:64
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{StartSend, Async, Poll, Stream, Sink, AsyncSink, Future, future};
[INFO] [stdout]   |                                                                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/eth/mod.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |             Ok(AsyncSink::NotReady(v)) => Ok(AsyncSink::NotReady(val)),
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/raw.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 96  | /         loop {
[INFO] [stdout] 97  | |             match result {
[INFO] [stdout] 98  | |                 Async::NotReady => return Ok(Async::Ready(())),
[INFO] [stdout] 99  | |                 Async::Ready(()) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |             }
[INFO] [stdout] 122 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 125 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/raw.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 131 | /         loop {
[INFO] [stdout] 132 | |             match result {
[INFO] [stdout] 133 | |                 Async::NotReady => return Ok(Async::Ready(())),
[INFO] [stdout] 134 | |                 Async::Ready(()) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 142 | |             }
[INFO] [stdout] 143 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 144 | 
[INFO] [stdout] 145 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/raw.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let mut rlpx = RLPxStream::new(handle, secret_key.clone(),
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `network_id`
[INFO] [stdout]   --> src/eth/mod.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     network_id: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Future`
[INFO] [stdout]  --> src/eth/mod.rs:3:64
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{StartSend, Async, Poll, Stream, Sink, AsyncSink, Future, future};
[INFO] [stdout]   |                                                                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/eth/mod.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |             Ok(AsyncSink::NotReady(v)) => Ok(AsyncSink::NotReady(val)),
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/raw.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let mut rlpx = RLPxStream::new(handle, secret_key.clone(),
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `network_id`
[INFO] [stdout]   --> src/eth/mod.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     network_id: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> examples/eth_connect.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> examples/eth_connect.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PublicKey`
[INFO] [stdout]   --> examples/eth_connect.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 | use secp256k1::{PublicKey, SecretKey};
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `H512`
[INFO] [stdout]   --> examples/eth_connect.rs:29:26
[INFO] [stdout]    |
[INFO] [stdout] 29 | use bigint::{H256, U256, H512};
[INFO] [stdout]    |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Header`
[INFO] [stdout]   --> examples/eth_connect.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 | use block::{Header, Block};
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]    --> examples/eth_connect.rs:113:59
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let mut timeout = Timeout::new(dur, &handle).unwrap().boxed();
[INFO] [stdout]     |                                                           ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]    --> examples/eth_connect.rs:128:29
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 timeout = t.boxed();
[INFO] [stdout]     |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]    --> examples/eth_connect.rs:145:63
[INFO] [stdout]     |
[INFO] [stdout] 145 |                 timeout = Timeout::new(dur, &handle).unwrap().boxed();
[INFO] [stdout]     |                                                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]    --> examples/eth_connect.rs:226:71
[INFO] [stdout]     |
[INFO] [stdout] 226 |                         timeout = Timeout::new(dur, &handle).unwrap().boxed();
[INFO] [stdout]     |                                                                       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `best_number` is assigned to, but never used
[INFO] [stdout]    --> examples/eth_connect.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let mut best_number: U256 = U256::zero();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_best_number` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `when`
[INFO] [stdout]    --> examples/eth_connect.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let mut when = Instant::now() + dur;
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_when`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `version`
[INFO] [stdout]    --> examples/eth_connect.rs:158:29
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 node, data, version
[INFO] [stdout]     |                             ^^^^^^^ help: try ignoring the field: `version: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_headers`
[INFO] [stdout]    --> examples/eth_connect.rs:168:33
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         number, max_headers, skip, reverse
[INFO] [stdout]     |                                 ^^^^^^^^^^^ help: try ignoring the field: `max_headers: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `skip`
[INFO] [stdout]    --> examples/eth_connect.rs:168:46
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         number, max_headers, skip, reverse
[INFO] [stdout]     |                                              ^^^^ help: try ignoring the field: `skip: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reverse`
[INFO] [stdout]    --> examples/eth_connect.rs:168:52
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         number, max_headers, skip, reverse
[INFO] [stdout]     |                                                    ^^^^^^^ help: try ignoring the field: `reverse: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_headers`
[INFO] [stdout]    --> examples/eth_connect.rs:188:31
[INFO] [stdout]     |
[INFO] [stdout] 188 |                         hash, max_headers, skip, reverse
[INFO] [stdout]     |                               ^^^^^^^^^^^ help: try ignoring the field: `max_headers: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `skip`
[INFO] [stdout]    --> examples/eth_connect.rs:188:44
[INFO] [stdout]     |
[INFO] [stdout] 188 |                         hash, max_headers, skip, reverse
[INFO] [stdout]     |                                            ^^^^ help: try ignoring the field: `skip: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reverse`
[INFO] [stdout]    --> examples/eth_connect.rs:188:50
[INFO] [stdout]     |
[INFO] [stdout] 188 |                         hash, max_headers, skip, reverse
[INFO] [stdout]     |                                                  ^^^^^^^ help: try ignoring the field: `reverse: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `best_number` is never read
[INFO] [stdout]    --> examples/eth_connect.rs:211:37
[INFO] [stdout]     |
[INFO] [stdout] 211 | ...                   best_number = header.number;
[INFO] [stdout]     |                       ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/eth_connect.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let mut client = ETHStream::new(
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/eth_connect.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut got_bodies_for_current = true;
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/eth_connect.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let mut when = Instant::now() + dur;
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/eth_connect.rs:111:29
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let (mut client_sender, mut client_receiver) = client.split();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NETWORK_ID`
[INFO] [stdout]   --> examples/eth_connect.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | const NETWORK_ID: usize = 1;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> examples/eth_connect.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 78 |     env_logger::init();
[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: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.60s
[INFO] running `Command { std: "docker" "inspect" "a69b2897e68f546a84819e14d31959b6fdc7fe9127375250ef369c644e6ce10e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a69b2897e68f546a84819e14d31959b6fdc7fe9127375250ef369c644e6ce10e", kill_on_drop: false }`
[INFO] [stdout] a69b2897e68f546a84819e14d31959b6fdc7fe9127375250ef369c644e6ce10e
