[INFO] cloning repository https://github.com/noormohammedb/rust-tcp-implementation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noormohammedb/rust-tcp-implementation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoormohammedb%2Frust-tcp-implementation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoormohammedb%2Frust-tcp-implementation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f31a26c074cd0c0a9dd06f830c68d06701d89c6
[INFO] testing noormohammedb/rust-tcp-implementation against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoormohammedb%2Frust-tcp-implementation" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/noormohammedb/rust-tcp-implementation
[INFO] finished tweaking git repo https://github.com/noormohammedb/rust-tcp-implementation
[INFO] tweaked toml for git repo https://github.com/noormohammedb/rust-tcp-implementation written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/noormohammedb/rust-tcp-implementation on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/noormohammedb/rust-tcp-implementation 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b649a665257779f00d17be0ea44a2fefce6a07c24e75e99462aaa110cd3401e
[INFO] running `Command { std: "docker" "start" "-a" "1b649a665257779f00d17be0ea44a2fefce6a07c24e75e99462aaa110cd3401e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b649a665257779f00d17be0ea44a2fefce6a07c24e75e99462aaa110cd3401e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b649a665257779f00d17be0ea44a2fefce6a07c24e75e99462aaa110cd3401e", kill_on_drop: false }`
[INFO] [stdout] 1b649a665257779f00d17be0ea44a2fefce6a07c24e75e99462aaa110cd3401e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06a26dbd79e601ccae6ea9309ed2ccae98db2b30591c87ddf702df380a1edd15
[INFO] running `Command { std: "docker" "start" "-a" "06a26dbd79e601ccae6ea9309ed2ccae98db2b30591c87ddf702df380a1edd15", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling etherparse v0.13.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling tun-tap v0.1.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling net2 v0.2.39
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling crossbeam-deque v0.7.4
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[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-udp v0.1.6
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.18
[INFO] [stderr]    Compiling trust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     loop {
[INFO] [stdout] 22 | |         let nbytes = nic.recv(&mut buf[..])?;
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 87 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tcp_state.rs:115:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |         let mut c = Connection {
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tcp_state.rs:147:13
[INFO] [stdout]     |
[INFO] [stdout] 147 |         let mut syn_ack_ip_packet = Ipv4Header::new(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unwritten`
[INFO] [stdout]    --> src/tcp_state.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let unwritten = {
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unwritten`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nic`
[INFO] [stdout]    --> src/tcp_state.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |         nic: &mut tun_tap::Iface,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_nic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iph`
[INFO] [stdout]    --> src/tcp_state.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |         iph: Ipv4HeaderSlice,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_iph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tcph`
[INFO] [stdout]    --> src/tcp_state.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |         tcph: TcpHeaderSlice,
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tcph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/tcp_state.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |         data: &[u8],
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:43
[INFO] [stdout]    |
[INFO] [stdout] 69 | ...                   Entry::Vacant(mut e) => {
[INFO] [stdout]    |                                     ----^
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip_hr_sz`
[INFO] [stdout]   --> src/main.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let ip_hr_sz = 20; // min ip header size
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_hr_sz`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `packet_version`
[INFO] [stdout]   --> src/main.rs:38:21
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 let packet_version = iph.version();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_packet_version`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t_len`
[INFO] [stdout]   --> src/main.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 let t_len = iph.total_len();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_t_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p_len`
[INFO] [stdout]   --> src/main.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 let p_len = iph.payload_len();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_p_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ETHERTYPE_IPV4` is never used
[INFO] [stdout]  --> src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ETHERTYPE_IPV4: u16 = 0x0800;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `state` and `recv` are never read
[INFO] [stdout]   --> src/tcp_state.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Connection {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 18 |     state: State,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 19 |     send: SendSequenceSpace,
[INFO] [stdout] 20 |     recv: ReceiveSequenceSpace,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Connection` 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 `una`, `nxt`, `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]   --> src/tcp_state.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct SendSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] 38 |     /// send unacknowledged
[INFO] [stdout] 39 |     una: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     /// send next
[INFO] [stdout] 41 |     nxt: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 46 |     /// segment sequence number used for last window update
[INFO] [stdout] 47 |     wl1: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 48 |     /// segment acknowledgment number used for last window update
[INFO] [stdout] 49 |     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 `nxt`, `wnd`, `up`, and `irs` are never read
[INFO] [stdout]   --> src/tcp_state.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct ReceiveSequenceSpace {
[INFO] [stdout]    |        -------------------- fields in this struct
[INFO] [stdout] 68 |     /// RCV.NXT - receive next
[INFO] [stdout] 69 |     nxt: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 70 |     /// RCV.WND - receive window
[INFO] [stdout] 71 |     wnd: u16,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 72 |     /// RCV.UP  - receive urgent pointer
[INFO] [stdout] 73 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 74 |     /// IRS     - initial receive sequence number
[INFO] [stdout] 75 |     irs: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReceiveSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp_state.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         nic.send(&buf[..syn_ack_ip_packet.header_len() + syn_ack.header_len() as usize + ip_hr_of]);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let _ = nic.send(&buf[..syn_ack_ip_packet.header_len() + syn_ack.header_len() as usize + ip_hr_of]);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.07s
[INFO] running `Command { std: "docker" "inspect" "06a26dbd79e601ccae6ea9309ed2ccae98db2b30591c87ddf702df380a1edd15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06a26dbd79e601ccae6ea9309ed2ccae98db2b30591c87ddf702df380a1edd15", kill_on_drop: false }`
[INFO] [stdout] 06a26dbd79e601ccae6ea9309ed2ccae98db2b30591c87ddf702df380a1edd15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99146876db032f6660bbbb75ba20acbd5c2162b6d8f41c2cb19bcd7821c46d08
[INFO] running `Command { std: "docker" "start" "-a" "99146876db032f6660bbbb75ba20acbd5c2162b6d8f41c2cb19bcd7821c46d08", kill_on_drop: false }`
[INFO] [stderr]    Compiling trust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     loop {
[INFO] [stdout] 22 | |         let nbytes = nic.recv(&mut buf[..])?;
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 87 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tcp_state.rs:115:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |         let mut c = Connection {
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tcp_state.rs:147:13
[INFO] [stdout]     |
[INFO] [stdout] 147 |         let mut syn_ack_ip_packet = Ipv4Header::new(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unwritten`
[INFO] [stdout]    --> src/tcp_state.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let unwritten = {
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unwritten`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nic`
[INFO] [stdout]    --> src/tcp_state.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |         nic: &mut tun_tap::Iface,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_nic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iph`
[INFO] [stdout]    --> src/tcp_state.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |         iph: Ipv4HeaderSlice,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_iph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tcph`
[INFO] [stdout]    --> src/tcp_state.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |         tcph: TcpHeaderSlice,
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tcph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/tcp_state.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |         data: &[u8],
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:43
[INFO] [stdout]    |
[INFO] [stdout] 69 | ...                   Entry::Vacant(mut e) => {
[INFO] [stdout]    |                                     ----^
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip_hr_sz`
[INFO] [stdout]   --> src/main.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let ip_hr_sz = 20; // min ip header size
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_hr_sz`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `packet_version`
[INFO] [stdout]   --> src/main.rs:38:21
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 let packet_version = iph.version();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_packet_version`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t_len`
[INFO] [stdout]   --> src/main.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 let t_len = iph.total_len();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_t_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p_len`
[INFO] [stdout]   --> src/main.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 let p_len = iph.payload_len();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_p_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ETHERTYPE_IPV4` is never used
[INFO] [stdout]  --> src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ETHERTYPE_IPV4: u16 = 0x0800;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `state` and `recv` are never read
[INFO] [stdout]   --> src/tcp_state.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Connection {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 18 |     state: State,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 19 |     send: SendSequenceSpace,
[INFO] [stdout] 20 |     recv: ReceiveSequenceSpace,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Connection` 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 `una`, `nxt`, `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]   --> src/tcp_state.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct SendSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] 38 |     /// send unacknowledged
[INFO] [stdout] 39 |     una: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     /// send next
[INFO] [stdout] 41 |     nxt: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 46 |     /// segment sequence number used for last window update
[INFO] [stdout] 47 |     wl1: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 48 |     /// segment acknowledgment number used for last window update
[INFO] [stdout] 49 |     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 `nxt`, `wnd`, `up`, and `irs` are never read
[INFO] [stdout]   --> src/tcp_state.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct ReceiveSequenceSpace {
[INFO] [stdout]    |        -------------------- fields in this struct
[INFO] [stdout] 68 |     /// RCV.NXT - receive next
[INFO] [stdout] 69 |     nxt: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 70 |     /// RCV.WND - receive window
[INFO] [stdout] 71 |     wnd: u16,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 72 |     /// RCV.UP  - receive urgent pointer
[INFO] [stdout] 73 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 74 |     /// IRS     - initial receive sequence number
[INFO] [stdout] 75 |     irs: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReceiveSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp_state.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         nic.send(&buf[..syn_ack_ip_packet.header_len() + syn_ack.header_len() as usize + ip_hr_of]);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let _ = nic.send(&buf[..syn_ack_ip_packet.header_len() + syn_ack.header_len() as usize + ip_hr_of]);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "99146876db032f6660bbbb75ba20acbd5c2162b6d8f41c2cb19bcd7821c46d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99146876db032f6660bbbb75ba20acbd5c2162b6d8f41c2cb19bcd7821c46d08", kill_on_drop: false }`
[INFO] [stdout] 99146876db032f6660bbbb75ba20acbd5c2162b6d8f41c2cb19bcd7821c46d08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 333f6e9a55108b2da9070e6922f9fa99c7941dee488f6032dbc54db63ee25820
[INFO] running `Command { std: "docker" "start" "-a" "333f6e9a55108b2da9070e6922f9fa99c7941dee488f6032dbc54db63ee25820", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | /     loop {
[INFO] [stderr] 22 | |         let nbytes = nic.recv(&mut buf[..])?;
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 87 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/tcp_state.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |         let mut c = Connection {
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/tcp_state.rs:147:13
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let mut syn_ack_ip_packet = Ipv4Header::new(
[INFO] [stderr]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `unwritten`
[INFO] [stderr]    --> src/tcp_state.rs:158:13
[INFO] [stderr]     |
[INFO] [stderr] 158 |         let unwritten = {
[INFO] [stderr]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unwritten`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nic`
[INFO] [stderr]    --> src/tcp_state.rs:177:9
[INFO] [stderr]     |
[INFO] [stderr] 177 |         nic: &mut tun_tap::Iface,
[INFO] [stderr]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_nic`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iph`
[INFO] [stderr]    --> src/tcp_state.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |         iph: Ipv4HeaderSlice,
[INFO] [stderr]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_iph`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tcph`
[INFO] [stderr]    --> src/tcp_state.rs:179:9
[INFO] [stderr]     |
[INFO] [stderr] 179 |         tcph: TcpHeaderSlice,
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tcph`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]    --> src/tcp_state.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |         data: &[u8],
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:69:43
[INFO] [stderr]    |
[INFO] [stderr] 69 | ...                   Entry::Vacant(mut e) => {
[INFO] [stderr]    |                                     ----^
[INFO] [stderr]    |                                     |
[INFO] [stderr]    |                                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ip_hr_sz`
[INFO] [stderr]   --> src/main.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let ip_hr_sz = 20; // min ip header size
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_hr_sz`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `packet_version`
[INFO] [stderr]   --> src/main.rs:38:21
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 let packet_version = iph.version();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_packet_version`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t_len`
[INFO] [stderr]   --> src/main.rs:42:21
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 let t_len = iph.total_len();
[INFO] [stderr]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_t_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p_len`
[INFO] [stderr]   --> src/main.rs:43:21
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 let p_len = iph.payload_len();
[INFO] [stderr]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_p_len`
[INFO] [stderr] 
[INFO] [stderr] warning: constant `ETHERTYPE_IPV4` is never used
[INFO] [stderr]  --> src/main.rs:4:7
[INFO] [stderr]   |
[INFO] [stderr] 4 | const ETHERTYPE_IPV4: u16 = 0x0800;
[INFO] [stderr]   |       ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `state` and `recv` are never read
[INFO] [stderr]   --> src/tcp_state.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Connection {
[INFO] [stderr]    |            ---------- fields in this struct
[INFO] [stderr] 18 |     state: State,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 19 |     send: SendSequenceSpace,
[INFO] [stderr] 20 |     recv: ReceiveSequenceSpace,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Connection` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `una`, `nxt`, `up`, `wl1`, and `wl2` are never read
[INFO] [stderr]   --> src/tcp_state.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct SendSequenceSpace {
[INFO] [stderr]    |        ----------------- fields in this struct
[INFO] [stderr] 38 |     /// send unacknowledged
[INFO] [stderr] 39 |     una: u32,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 40 |     /// send next
[INFO] [stderr] 41 |     nxt: u32,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] ...
[INFO] [stderr] 45 |     up: bool,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 46 |     /// segment sequence number used for last window update
[INFO] [stderr] 47 |     wl1: u32,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 48 |     /// segment acknowledgment number used for last window update
[INFO] [stderr] 49 |     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 `nxt`, `wnd`, `up`, and `irs` are never read
[INFO] [stderr]   --> src/tcp_state.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 67 | struct ReceiveSequenceSpace {
[INFO] [stderr]    |        -------------------- fields in this struct
[INFO] [stderr] 68 |     /// RCV.NXT - receive next
[INFO] [stderr] 69 |     nxt: u32,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 70 |     /// RCV.WND - receive window
[INFO] [stderr] 71 |     wnd: u16,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 72 |     /// RCV.UP  - receive urgent pointer
[INFO] [stderr] 73 |     up: bool,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 74 |     /// IRS     - initial receive sequence number
[INFO] [stderr] 75 |     irs: u32,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ReceiveSequenceSpace` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/tcp_state.rs:171:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |         nic.send(&buf[..syn_ack_ip_packet.header_len() + syn_ack.header_len() as usize + ip_hr_of]);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let _ = nic.send(&buf[..syn_ack_ip_packet.header_len() + syn_ack.header_len() as usize + ip_hr_of]);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `trust` (bin "trust" test) generated 18 warnings (run `cargo fix --bin "trust" -p trust --tests` to apply 12 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.78s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/trust-72ba78a6d3f7cb1d)
[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] running `Command { std: "docker" "inspect" "333f6e9a55108b2da9070e6922f9fa99c7941dee488f6032dbc54db63ee25820", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "333f6e9a55108b2da9070e6922f9fa99c7941dee488f6032dbc54db63ee25820", kill_on_drop: false }`
[INFO] [stdout] 333f6e9a55108b2da9070e6922f9fa99c7941dee488f6032dbc54db63ee25820
