[INFO] cloning repository https://github.com/StrayLittlePunk/rust-tcp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/StrayLittlePunk/rust-tcp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStrayLittlePunk%2Frust-tcp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStrayLittlePunk%2Frust-tcp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8883bcbdd13d408cf64e9d51d72fab81e9242358
[INFO] testing StrayLittlePunk/rust-tcp against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStrayLittlePunk%2Frust-tcp" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/StrayLittlePunk/rust-tcp
[INFO] finished tweaking git repo https://github.com/StrayLittlePunk/rust-tcp
[INFO] tweaked toml for git repo https://github.com/StrayLittlePunk/rust-tcp written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/StrayLittlePunk/rust-tcp on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/StrayLittlePunk/rust-tcp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scoped-tls v0.1.2
[INFO] [stderr]   Downloaded tun-tap v0.1.3
[INFO] [stderr]   Downloaded etherparse v0.13.0
[INFO] [stderr]   Downloaded tokio-core v0.1.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ad54721b3eadfc566160b6951e501a0ee4b99191215ac1b402617aadf47a894
[INFO] running `Command { std: "docker" "start" "-a" "7ad54721b3eadfc566160b6951e501a0ee4b99191215ac1b402617aadf47a894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ad54721b3eadfc566160b6951e501a0ee4b99191215ac1b402617aadf47a894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ad54721b3eadfc566160b6951e501a0ee4b99191215ac1b402617aadf47a894", kill_on_drop: false }`
[INFO] [stdout] 7ad54721b3eadfc566160b6951e501a0ee4b99191215ac1b402617aadf47a894
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c13f7216fba91c551a79dec2540c6c3b7d90a78a1646206afb786cae2f12025a
[INFO] running `Command { std: "docker" "start" "-a" "c13f7216fba91c551a79dec2540c6c3b7d90a78a1646206afb786cae2f12025a", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling net2 v0.2.38
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling tun-tap v0.1.3
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling etherparse v0.13.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling nix v0.26.2
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.18
[INFO] [stderr]    Compiling rust-tcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::tcp::State`
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::tcp::State;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `how`
[INFO] [stdout]    --> src/lib.rs:273:28
[INFO] [stdout]     |
[INFO] [stdout] 273 |     pub fn shutdown(&self, how: std::net::Shutdown) -> io::Result<()> {
[INFO] [stdout]     |                            ^^^ help: if this is intentional, prefix it with an underscore: `_how`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lib.rs:288:21
[INFO] [stdout]     |
[INFO] [stdout] 288 |         if let Some(c) = cm.connections.remove(&self.quad) {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quad`
[INFO] [stdout]    --> src/lib.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |         for quad in pending {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_quad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 28 |     fn is_synchronized(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_send` is never read
[INFO] [stdout]   --> src/tcp.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Timers {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 54 |     last_send: Instant,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Timers` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `have_sent_fin` is never used
[INFO] [stdout]   --> src/tcp.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Connection {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn have_sent_fin(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]    --> src/tcp.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | struct SendSequenceSpace {
[INFO] [stdout]     |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 133 |     up: bool,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 134 |     /// segment sequence number used for last window update
[INFO] [stdout] 135 |     wl1: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 136 |     /// segment acknowledgment number used for last window update
[INFO] [stdout] 137 |     wl2: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SendSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]    --> src/tcp.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 155 | struct RecvSequenceSpace {
[INFO] [stdout]     |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 161 |     up: bool,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 162 |     /// initial receive sequence number
[INFO] [stdout] 163 |     irs: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RecvSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:545:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 545 |     fn send_rst<'a>(&mut self, nic: &Iface) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |         c.close();
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 280 |         let _ = c.close();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.84s
[INFO] running `Command { std: "docker" "inspect" "c13f7216fba91c551a79dec2540c6c3b7d90a78a1646206afb786cae2f12025a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c13f7216fba91c551a79dec2540c6c3b7d90a78a1646206afb786cae2f12025a", kill_on_drop: false }`
[INFO] [stdout] c13f7216fba91c551a79dec2540c6c3b7d90a78a1646206afb786cae2f12025a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37d5c213741111c68f0f23222c5d0820997525caa0824c7aa62e12b9ea62f060
[INFO] running `Command { std: "docker" "start" "-a" "37d5c213741111c68f0f23222c5d0820997525caa0824c7aa62e12b9ea62f060", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `crate::tcp::State`
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::tcp::State;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `how`
[INFO] [stdout]    --> src/lib.rs:273:28
[INFO] [stdout]     |
[INFO] [stdout] 273 |     pub fn shutdown(&self, how: std::net::Shutdown) -> io::Result<()> {
[INFO] [stdout]     |                            ^^^ help: if this is intentional, prefix it with an underscore: `_how`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lib.rs:288:21
[INFO] [stdout]     |
[INFO] [stdout] 288 |         if let Some(c) = cm.connections.remove(&self.quad) {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quad`
[INFO] [stdout]    --> src/lib.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |         for quad in pending {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_quad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 28 |     fn is_synchronized(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_send` is never read
[INFO] [stdout]   --> src/tcp.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Timers {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 54 |     last_send: Instant,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Timers` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `have_sent_fin` is never used
[INFO] [stdout]   --> src/tcp.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Connection {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn have_sent_fin(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]    --> src/tcp.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | struct SendSequenceSpace {
[INFO] [stdout]     |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 133 |     up: bool,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 134 |     /// segment sequence number used for last window update
[INFO] [stdout] 135 |     wl1: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 136 |     /// segment acknowledgment number used for last window update
[INFO] [stdout] 137 |     wl2: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SendSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]    --> src/tcp.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 155 | struct RecvSequenceSpace {
[INFO] [stdout]     |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 161 |     up: bool,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 162 |     /// initial receive sequence number
[INFO] [stdout] 163 |     irs: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RecvSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-tcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:545:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 545 |     fn send_rst<'a>(&mut self, nic: &Iface) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |         c.close();
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 280 |         let _ = c.close();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tcp::State`
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::tcp::State;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `how`
[INFO] [stdout]    --> src/lib.rs:273:28
[INFO] [stdout]     |
[INFO] [stdout] 273 |     pub fn shutdown(&self, how: std::net::Shutdown) -> io::Result<()> {
[INFO] [stdout]     |                            ^^^ help: if this is intentional, prefix it with an underscore: `_how`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lib.rs:288:21
[INFO] [stdout]     |
[INFO] [stdout] 288 |         if let Some(c) = cm.connections.remove(&self.quad) {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quad`
[INFO] [stdout]    --> src/lib.rs:328:13
[INFO] [stdout]     |
[INFO] [stdout] 328 |         for quad in pending {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_quad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 28 |     fn is_synchronized(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_send` is never read
[INFO] [stdout]   --> src/tcp.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Timers {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 54 |     last_send: Instant,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Timers` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `have_sent_fin` is never used
[INFO] [stdout]   --> src/tcp.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Connection {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn have_sent_fin(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]    --> src/tcp.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | struct SendSequenceSpace {
[INFO] [stdout]     |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 133 |     up: bool,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 134 |     /// segment sequence number used for last window update
[INFO] [stdout] 135 |     wl1: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 136 |     /// segment acknowledgment number used for last window update
[INFO] [stdout] 137 |     wl2: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SendSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]    --> src/tcp.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 155 | struct RecvSequenceSpace {
[INFO] [stdout]     |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 161 |     up: bool,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 162 |     /// initial receive sequence number
[INFO] [stdout] 163 |     irs: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RecvSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:545:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 545 |     fn send_rst<'a>(&mut self, nic: &Iface) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |         c.close();
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 280 |         let _ = c.close();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "37d5c213741111c68f0f23222c5d0820997525caa0824c7aa62e12b9ea62f060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37d5c213741111c68f0f23222c5d0820997525caa0824c7aa62e12b9ea62f060", kill_on_drop: false }`
[INFO] [stdout] 37d5c213741111c68f0f23222c5d0820997525caa0824c7aa62e12b9ea62f060
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9b9ca896221d4e279c30911387351763b3bdced7e163bfe7ccd78e7fc1a9a07a
[INFO] running `Command { std: "docker" "start" "-a" "9b9ca896221d4e279c30911387351763b3bdced7e163bfe7ccd78e7fc1a9a07a", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::tcp::State`
[INFO] [stderr]   --> src/lib.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use crate::tcp::State;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `how`
[INFO] [stderr]    --> src/lib.rs:273:28
[INFO] [stderr]     |
[INFO] [stderr] 273 |     pub fn shutdown(&self, how: std::net::Shutdown) -> io::Result<()> {
[INFO] [stderr]     |                            ^^^ help: if this is intentional, prefix it with an underscore: `_how`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]    --> src/lib.rs:288:21
[INFO] [stderr]     |
[INFO] [stderr] 288 |         if let Some(c) = cm.connections.remove(&self.quad) {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `quad`
[INFO] [stderr]    --> src/lib.rs:328:13
[INFO] [stderr]     |
[INFO] [stderr] 328 |         for quad in pending {
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_quad`
[INFO] [stderr] 
[INFO] [stderr] warning: method `is_synchronized` is never used
[INFO] [stderr]   --> src/tcp.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl State {
[INFO] [stderr]    | ---------- method in this implementation
[INFO] [stderr] 28 |     fn is_synchronized(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `last_send` is never read
[INFO] [stderr]   --> src/tcp.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 53 | struct Timers {
[INFO] [stderr]    |        ------ field in this struct
[INFO] [stderr] 54 |     last_send: Instant,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Timers` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: method `have_sent_fin` is never used
[INFO] [stderr]   --> src/tcp.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | impl Connection {
[INFO] [stderr]    | --------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 97 |     fn have_sent_fin(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `up`, `wl1`, and `wl2` are never read
[INFO] [stderr]    --> src/tcp.rs:133:5
[INFO] [stderr]     |
[INFO] [stderr] 125 | struct SendSequenceSpace {
[INFO] [stderr]     |        ----------------- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 133 |     up: bool,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 134 |     /// segment sequence number used for last window update
[INFO] [stderr] 135 |     wl1: u32,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 136 |     /// segment acknowledgment number used for last window update
[INFO] [stderr] 137 |     wl2: u32,
[INFO] [stderr]     |     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `SendSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `up` and `irs` are never read
[INFO] [stderr]    --> src/tcp.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 155 | struct RecvSequenceSpace {
[INFO] [stderr]     |        ----------------- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 161 |     up: bool,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 162 |     /// initial receive sequence number
[INFO] [stderr] 163 |     irs: u32,
[INFO] [stderr]     |     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `RecvSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: method `send_rst` is never used
[INFO] [stderr]    --> src/tcp.rs:545:8
[INFO] [stderr]     |
[INFO] [stderr] 166 | impl Connection {
[INFO] [stderr]     | --------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 545 |     fn send_rst<'a>(&mut self, nic: &Iface) -> io::Result<()> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:280:9
[INFO] [stderr]     |
[INFO] [stderr] 280 |         c.close();
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let _ = c.close();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-tcp` (lib) generated 11 warnings (run `cargo fix --lib -p rust-tcp` to apply 1 suggestion)
[INFO] [stderr] warning: `rust-tcp` (lib test) generated 11 warnings (11 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_tcp-1f2325d8162b143e)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_tcp-140ced0204d2fee2)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_tcp
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/tcp.rs - tcp::SendSequenceSpace (line 113) ... FAILED
[INFO] [stdout] test src/tcp.rs - tcp::RecvSequenceSpace (line 144) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/tcp.rs - tcp::SendSequenceSpace (line 113) stdout ----
[INFO] [stdout] error: expected item, found `1`
[INFO] [stdout]  --> src/tcp.rs:114:14
[INFO] [stdout]   |
[INFO] [stdout] 1 |              1         2          3          4
[INFO] [stdout]   |              ^ expected item
[INFO] [stdout]   |
[INFO] [stdout]   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/tcp.rs - tcp::RecvSequenceSpace (line 144) stdout ----
[INFO] [stdout] error: expected item, found `1`
[INFO] [stdout]  --> src/tcp.rs:145:17
[INFO] [stdout]   |
[INFO] [stdout] 1 |                 1          2          3
[INFO] [stdout]   |                 ^ expected item
[INFO] [stdout]   |
[INFO] [stdout]   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/tcp.rs - tcp::RecvSequenceSpace (line 144)
[INFO] [stdout]     src/tcp.rs - tcp::SendSequenceSpace (line 113)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "9b9ca896221d4e279c30911387351763b3bdced7e163bfe7ccd78e7fc1a9a07a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b9ca896221d4e279c30911387351763b3bdced7e163bfe7ccd78e7fc1a9a07a", kill_on_drop: false }`
[INFO] [stdout] 9b9ca896221d4e279c30911387351763b3bdced7e163bfe7ccd78e7fc1a9a07a
