[INFO] cloning repository https://github.com/ashfordneil/net-tiger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ashfordneil/net-tiger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashfordneil%2Fnet-tiger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashfordneil%2Fnet-tiger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10c8cd7478f4e309b174f97771290dd58430c617
[INFO] checking ashfordneil/net-tiger against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashfordneil%2Fnet-tiger" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ashfordneil/net-tiger on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ashfordneil/net-tiger
[INFO] finished tweaking git repo https://github.com/ashfordneil/net-tiger
[INFO] tweaked toml for git repo https://github.com/ashfordneil/net-tiger written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/ashfordneil/net-tiger already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rusty-fork v0.2.2
[INFO] [stderr]   Downloaded tokio-reactor v0.1.10
[INFO] [stderr]   Downloaded structopt-derive v0.3.4
[INFO] [stderr]   Downloaded structopt v0.3.4
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.16
[INFO] [stderr]   Downloaded unicode-normalization v0.1.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58c30f7aaaf77eb70b922ca6da0155e9c900f274551f17cececee7d22a057527
[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" "58c30f7aaaf77eb70b922ca6da0155e9c900f274551f17cececee7d22a057527", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58c30f7aaaf77eb70b922ca6da0155e9c900f274551f17cececee7d22a057527", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58c30f7aaaf77eb70b922ca6da0155e9c900f274551f17cececee7d22a057527", kill_on_drop: false }`
[INFO] [stdout] 58c30f7aaaf77eb70b922ca6da0155e9c900f274551f17cececee7d22a057527
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3805bebe22b2b2d07b30a021f312c534a2e73b9374172503393d40a88bf6178d
[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" "3805bebe22b2b2d07b30a021f312c534a2e73b9374172503393d40a88bf6178d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling semver v0.9.0
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[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking unicode-normalization v0.1.9
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[INFO] [stderr]    Compiling rustc_version v0.2.3
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[INFO] [stderr]    Compiling parking_lot_core v0.6.2
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[INFO] [stderr]     Checking tokio-tcp v0.1.3
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[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]    Compiling enum-as-inner v0.2.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling structopt-derive v0.3.4
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking trust-dns-proto v0.8.0
[INFO] [stderr]     Checking structopt v0.3.4
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking trust-dns-resolver v0.12.0
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking net-tiger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `clone`
[INFO] [stdout]   --> src/executor/waker.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 |     unsafe fn clone(raw: *const ()) -> RawWaker {
[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: `wake`
[INFO] [stdout]   --> src/executor/waker.rs:24:15
[INFO] [stdout]    |
[INFO] [stdout] 24 |     unsafe fn wake(raw: *const ()) {
[INFO] [stdout]    |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `wake_by_ref`
[INFO] [stdout]   --> src/executor/waker.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     unsafe fn wake_by_ref(raw: *const ()) {
[INFO] [stdout]    |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `drop`
[INFO] [stdout]   --> src/executor/waker.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 |     unsafe fn drop(raw: *const ()) {
[INFO] [stdout]    |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant is never used: `V_TABLE`
[INFO] [stdout]   --> src/executor/waker.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | /     const V_TABLE: RawWakerVTable =
[INFO] [stdout] 43 | |         RawWakerVTable::new(Self::clone, Self::wake, Self::wake_by_ref, Self::drop);
[INFO] [stdout]    | |____________________________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_raw_waker`
[INFO] [stdout]   --> src/executor/waker.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn to_raw_waker(self) -> RawWaker {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_waker`
[INFO] [stdout]   --> src/executor/waker.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn to_waker(self) -> task::Waker {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `do_wake`
[INFO] [stdout]   --> src/executor/waker.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn do_wake(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Task`
[INFO] [stdout]   --> src/executor.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | type Task<'a, T> = Pin<Box<dyn 'a + Future<Output = T>>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Executor`
[INFO] [stdout]   --> src/executor.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Executor {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/executor.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spawn`
[INFO] [stdout]   --> src/executor.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn spawn(&mut self, future: impl 'static + Future<Output = ()>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `complete`
[INFO] [stdout]   --> src/executor.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn complete<'a, T>(&mut self, future: impl 'a + Future<Output = T>) -> Result<T, Error> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `take`
[INFO] [stdout]   --> src/reactor/stdin.rs:28:16
[INFO] [stdout]    |
[INFO] [stdout] 28 |         pub fn take() -> Result<Self, Error> {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/reactor/stdin.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn new() -> Result<Self, Error> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `inner`
[INFO] [stdout]   --> src/reactor.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     inner: Poll,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spin_`
[INFO] [stdout]   --> src/reactor.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn spin_(&self) -> Result<(), Error> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spin`
[INFO] [stdout]   --> src/reactor.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn spin() -> Result<(), Error> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/reactor.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `register`
[INFO] [stdout]   --> src/reactor.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn register(&self, io: &impl Evented, interest: Ready, opts: PollOpt) -> Result<(), Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spawn`
[INFO] [stdout]   --> src/executor.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn spawn(&mut self, future: impl 'static + Future<Output = ()>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 41s
[INFO] running `Command { std: "docker" "inspect" "3805bebe22b2b2d07b30a021f312c534a2e73b9374172503393d40a88bf6178d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3805bebe22b2b2d07b30a021f312c534a2e73b9374172503393d40a88bf6178d", kill_on_drop: false }`
[INFO] [stdout] 3805bebe22b2b2d07b30a021f312c534a2e73b9374172503393d40a88bf6178d