[INFO] cloning repository https://github.com/numinnex/user_space_tcp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/numinnex/user_space_tcp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuminnex%2Fuser_space_tcp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuminnex%2Fuser_space_tcp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 812f19b467d3c68a861bbc4b318a8413f32a51c3
[INFO] checking numinnex/user_space_tcp against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuminnex%2Fuser_space_tcp" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/numinnex/user_space_tcp on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/numinnex/user_space_tcp
[INFO] finished tweaking git repo https://github.com/numinnex/user_space_tcp
[INFO] tweaked toml for git repo https://github.com/numinnex/user_space_tcp written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/numinnex/user_space_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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-core v0.1.18
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.4
[INFO] [stderr]   Downloaded tun-tap v0.1.4
[INFO] [stderr]   Downloaded etherparse v0.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 333c3e63f901c6584b05e82a9c9ef2d952c3b7b83da4e731750f078474d528df
[INFO] running `Command { std: "docker" "start" "-a" "333c3e63f901c6584b05e82a9c9ef2d952c3b7b83da4e731750f078474d528df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "333c3e63f901c6584b05e82a9c9ef2d952c3b7b83da4e731750f078474d528df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "333c3e63f901c6584b05e82a9c9ef2d952c3b7b83da4e731750f078474d528df", kill_on_drop: false }`
[INFO] [stdout] 333c3e63f901c6584b05e82a9c9ef2d952c3b7b83da4e731750f078474d528df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid" "-e" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08e4160a017b7d597b8136422255324bb2cf3dea32afa0b25e0bdbbf74def724
[INFO] running `Command { std: "docker" "start" "-a" "08e4160a017b7d597b8136422255324bb2cf3dea32afa0b25e0bdbbf74def724", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking tokio-trace-core v0.1.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling cc v1.0.104
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]    Compiling tun-tap v0.1.4
[INFO] [stderr]     Checking etherparse v0.15.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio v0.1.19
[INFO] [stderr]     Checking tokio-core v0.1.18
[INFO] [stderr]     Checking user_space_tcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `quad`
[INFO] [stdout]    --> src/stream.rs:305:13
[INFO] [stdout]     |
[INFO] [stdout] 305 |         for quad in pending {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_quad`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `how`
[INFO] [stdout]    --> src/stream.rs:313:28
[INFO] [stdout]     |
[INFO] [stdout] 313 |     pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
[INFO] [stdout]     |                            ^^^ help: if this is intentional, prefix it with an underscore: `_how`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `payload`
[INFO] [stdout]    --> src/tcp.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         payload: &[u8],
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_payload`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip_header`
[INFO] [stdout]    --> src/tcp.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |         ip_header: Ipv4HeaderSlice,
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_header`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `shutdown` is never used
[INFO] [stdout]    --> src/stream.rs:313:12
[INFO] [stdout]     |
[INFO] [stdout] 312 | impl TcpStream {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 313 |     pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 28 |     pub fn is_synchronized(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `wnd`, `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]   --> src/tcp.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct SendSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 73 |     wnd: u16,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 74 |     // send urgent pointer
[INFO] [stdout] 75 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 76 |     // segment sequence number used for last window update
[INFO] [stdout] 77 |     wl1: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 78 |     // segment acknowledgment number used for last window update
[INFO] [stdout] 79 |     wl2: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]   --> src/tcp.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 84 | struct RecvSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 90 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 91 |     // initial receive sequence number
[INFO] [stdout] 92 |     irs: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:194:8
[INFO] [stdout]     |
[INFO] [stdout] 95  | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 194 |     fn send_rst(&mut self, nic: &mut tun_tap::Iface) -> Result<(), io::Error> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quad`
[INFO] [stdout]    --> src/stream.rs:305:13
[INFO] [stdout]     |
[INFO] [stdout] 305 |         for quad in pending {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_quad`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `how`
[INFO] [stdout]    --> src/stream.rs:313:28
[INFO] [stdout]     |
[INFO] [stdout] 313 |     pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
[INFO] [stdout]     |                            ^^^ help: if this is intentional, prefix it with an underscore: `_how`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `payload`
[INFO] [stdout]    --> src/tcp.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         payload: &[u8],
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_payload`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip_header`
[INFO] [stdout]    --> src/tcp.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |         ip_header: Ipv4HeaderSlice,
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_header`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `shutdown` is never used
[INFO] [stdout]    --> src/stream.rs:313:12
[INFO] [stdout]     |
[INFO] [stdout] 312 | impl TcpStream {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 313 |     pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 28 |     pub fn is_synchronized(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `wnd`, `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]   --> src/tcp.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct SendSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 73 |     wnd: u16,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 74 |     // send urgent pointer
[INFO] [stdout] 75 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 76 |     // segment sequence number used for last window update
[INFO] [stdout] 77 |     wl1: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 78 |     // segment acknowledgment number used for last window update
[INFO] [stdout] 79 |     wl2: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]   --> src/tcp.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 84 | struct RecvSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 90 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 91 |     // initial receive sequence number
[INFO] [stdout] 92 |     irs: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:194:8
[INFO] [stdout]     |
[INFO] [stdout] 95  | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 194 |     fn send_rst(&mut self, nic: &mut tun_tap::Iface) -> Result<(), io::Error> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.96s
[INFO] running `Command { std: "docker" "inspect" "08e4160a017b7d597b8136422255324bb2cf3dea32afa0b25e0bdbbf74def724", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08e4160a017b7d597b8136422255324bb2cf3dea32afa0b25e0bdbbf74def724", kill_on_drop: false }`
[INFO] [stdout] 08e4160a017b7d597b8136422255324bb2cf3dea32afa0b25e0bdbbf74def724