[INFO] fetching crate servant 0.1.0...
[INFO] checking servant-0.1.0 against master#1557fb031b272b4c5bfcc7de5df7eddc7b36a584 for pr-73166
[INFO] extracting crate servant 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate servant 0.1.0 on toolchain 1557fb031b272b4c5bfcc7de5df7eddc7b36a584
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate servant 0.1.0
[INFO] finished tweaking crates.io crate servant 0.1.0
[INFO] tweaked toml for crates.io crate servant 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4420cc28fe4f22f7228671e843f2fb9d11b21199df62015e18be22376cc501af
[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" "4420cc28fe4f22f7228671e843f2fb9d11b21199df62015e18be22376cc501af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4420cc28fe4f22f7228671e843f2fb9d11b21199df62015e18be22376cc501af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4420cc28fe4f22f7228671e843f2fb9d11b21199df62015e18be22376cc501af", kill_on_drop: false }`
[INFO] [stdout] 4420cc28fe4f22f7228671e843f2fb9d11b21199df62015e18be22376cc501af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 931f6f8181b018fc9fa90e877a20f57490df793dcf76a5d87bf91e4e3e645605
[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" "931f6f8181b018fc9fa90e877a20f57490df793dcf76a5d87bf91e4e3e645605", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.65
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.65
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking fastrand v1.3.3
[INFO] [stderr]     Checking parking v1.0.5
[INFO] [stderr]     Checking event-listener v2.2.0
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking waker-fn v1.0.0
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking send_wrapper v0.4.0
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking concurrent-queue v1.1.1
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking futures-lite v0.1.9
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking async-channel v1.1.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking blocking v0.4.7
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.65
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.65
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling servant-macro v0.1.0
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.65
[INFO] [stderr]     Checking ring-channel v0.7.0
[INFO] [stderr]     Checking servant-log v0.1.0
[INFO] [stderr]     Checking js-sys v0.3.42
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking serde v1.0.114
[INFO] [stderr]     Checking web-sys v0.3.42
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking smol v0.1.18
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking futures_codec v0.3.4
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking async-std v1.6.2
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking servant-codec v0.1.0
[INFO] [stderr]     Checking servant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `tail`
[INFO] [stdout]   --> src/list.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     tail: Option<Node<T>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/list.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/list.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `top`
[INFO] [stdout]   --> src/list.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn top(&mut self, node: Node<T>) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bottom`
[INFO] [stdout]   --> src/list.rs:81:12
[INFO] [stdout]    |
[INFO] [stdout] 81 |     pub fn bottom(&mut self, node: Node<T>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> src/list.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn remove(&mut self, node: Node<T>) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_head`
[INFO] [stdout]    --> src/list.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn push_head(&mut self, val: T) -> Node<T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_back`
[INFO] [stdout]    --> src/list.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn push_back(&mut self, val: T) -> Node<T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_head`
[INFO] [stdout]    --> src/list.rs:150:12
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn pop_head(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_back`
[INFO] [stdout]    --> src/list.rs:165:12
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn pop_back(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DEFAULT_TIMEOUT_MS`
[INFO] [stdout]   --> src/servant.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | const DEFAULT_TIMEOUT_MS: usize = 5000;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/list.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DEFAULT_TIMEOUT_MS`
[INFO] [stdout]   --> src/servant.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | const DEFAULT_TIMEOUT_MS: usize = 5000;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 33s
[INFO] running `Command { std: "docker" "inspect" "931f6f8181b018fc9fa90e877a20f57490df793dcf76a5d87bf91e4e3e645605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "931f6f8181b018fc9fa90e877a20f57490df793dcf76a5d87bf91e4e3e645605", kill_on_drop: false }`
[INFO] [stdout] 931f6f8181b018fc9fa90e877a20f57490df793dcf76a5d87bf91e4e3e645605