[INFO] cloning repository https://github.com/joezhang98/tcp-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joezhang98/tcp-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoezhang98%2Ftcp-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoezhang98%2Ftcp-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ca7814d4fcded1df59fd9b54a1f0b39c6a62cce
[INFO] checking joezhang98/tcp-rust against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoezhang98%2Ftcp-rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/joezhang98/tcp-rust
[INFO] finished tweaking git repo https://github.com/joezhang98/tcp-rust
[INFO] tweaked toml for git repo https://github.com/joezhang98/tcp-rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/joezhang98/tcp-rust on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/joezhang98/tcp-rust 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94db2ca0032e86522b6f82c1e662f26e72c07e6be9369eb68998ebf2658cd672
[INFO] running `Command { std: "docker" "start" "-a" "94db2ca0032e86522b6f82c1e662f26e72c07e6be9369eb68998ebf2658cd672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94db2ca0032e86522b6f82c1e662f26e72c07e6be9369eb68998ebf2658cd672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94db2ca0032e86522b6f82c1e662f26e72c07e6be9369eb68998ebf2658cd672", kill_on_drop: false }`
[INFO] [stdout] 94db2ca0032e86522b6f82c1e662f26e72c07e6be9369eb68998ebf2658cd672
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53bcf3092cfdabd09c9bf574413d1d48f15e0853c3072355230a43e6713cbe8e
[INFO] running `Command { std: "docker" "start" "-a" "53bcf3092cfdabd09c9bf574413d1d48f15e0853c3072355230a43e6713cbe8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]     Checking etherparse v0.8.3
[INFO] [stderr]    Compiling tun-tap v0.1.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.18
[INFO] [stderr]     Checking tcprust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut buf = [0u8; 1500];
[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: unused variable: `data`
[INFO] [stdout]   --> src/tcp.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |         data: &'a [u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/tcp.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut buf = [0u8; 1500];
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iph`
[INFO] [stdout]    --> src/tcp.rs:206:9
[INFO] [stdout]     |
[INFO] [stdout] 206 |         iph: etherparse::Ipv4HeaderSlice<'a>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_iph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:53:43
[INFO] [stdout]    |
[INFO] [stdout] 53 | ...                   Entry::Vacant(mut e) => {
[INFO] [stdout]    |                                     ----^
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 13 |     fn is_synchronized(&self) -> bool {
[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 `wnd`, `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]   --> src/tcp.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct SendSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |     wnd: u16,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 49 |     /// send urgent pointer
[INFO] [stdout] 50 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 51 |     /// segment sequence number for last window update
[INFO] [stdout] 52 |     wl1: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 53 |     /// segment acknowledgement number used for last window update
[INFO] [stdout] 54 |     wl2: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]   --> src/tcp.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | struct RecvSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 77 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 78 |     /// initial receive sequence number
[INFO] [stdout] 79 |     irs: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:180:8
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 180 |     fn send_rst(&mut self, nic: &mut tun_tap::Iface) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut buf = [0u8; 1500];
[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: unused variable: `data`
[INFO] [stdout]   --> src/tcp.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |         data: &'a [u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/tcp.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut buf = [0u8; 1500];
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 | /         self.ip
[INFO] [stdout] 153 | |             .set_payload_len(size - self.ip.header_len() as usize);
[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] 152 |         let _ = self.ip
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp.rs:163:9
[INFO] [stdout]     |
[INFO] [stdout] 163 |         self.ip.write(&mut unwritten);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 163 |         let _ = self.ip.write(&mut unwritten);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |         self.tcp.write(&mut unwritten);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let _ = self.tcp.write(&mut unwritten);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iph`
[INFO] [stdout]    --> src/tcp.rs:206:9
[INFO] [stdout]     |
[INFO] [stdout] 206 |         iph: etherparse::Ipv4HeaderSlice<'a>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_iph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:53:43
[INFO] [stdout]    |
[INFO] [stdout] 53 | ...                   Entry::Vacant(mut e) => {
[INFO] [stdout]    |                                     ----^
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_synchronized` is never used
[INFO] [stdout]   --> src/tcp.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl State {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 13 |     fn is_synchronized(&self) -> bool {
[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 `wnd`, `up`, `wl1`, and `wl2` are never read
[INFO] [stdout]   --> src/tcp.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct SendSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |     wnd: u16,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 49 |     /// send urgent pointer
[INFO] [stdout] 50 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 51 |     /// segment sequence number for last window update
[INFO] [stdout] 52 |     wl1: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 53 |     /// segment acknowledgement number used for last window update
[INFO] [stdout] 54 |     wl2: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `up` and `irs` are never read
[INFO] [stdout]   --> src/tcp.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | struct RecvSequenceSpace {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 77 |     up: bool,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 78 |     /// initial receive sequence number
[INFO] [stdout] 79 |     irs: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_rst` is never used
[INFO] [stdout]    --> src/tcp.rs:180:8
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl Connection {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 180 |     fn send_rst(&mut self, nic: &mut tun_tap::Iface) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 | /         self.ip
[INFO] [stdout] 153 | |             .set_payload_len(size - self.ip.header_len() as usize);
[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] 152 |         let _ = self.ip
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp.rs:163:9
[INFO] [stdout]     |
[INFO] [stdout] 163 |         self.ip.write(&mut unwritten);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 163 |         let _ = self.ip.write(&mut unwritten);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/tcp.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |         self.tcp.write(&mut unwritten);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let _ = self.tcp.write(&mut unwritten);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.21s
[INFO] running `Command { std: "docker" "inspect" "53bcf3092cfdabd09c9bf574413d1d48f15e0853c3072355230a43e6713cbe8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53bcf3092cfdabd09c9bf574413d1d48f15e0853c3072355230a43e6713cbe8e", kill_on_drop: false }`
[INFO] [stdout] 53bcf3092cfdabd09c9bf574413d1d48f15e0853c3072355230a43e6713cbe8e
