[INFO] cloning repository https://github.com/jessym/rust-tcp-from-scratch
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jessym/rust-tcp-from-scratch" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjessym%2Frust-tcp-from-scratch", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjessym%2Frust-tcp-from-scratch'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cfa5e306a56d24d4936ecffce120256827ec4d68
[INFO] checking jessym/rust-tcp-from-scratch against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjessym%2Frust-tcp-from-scratch" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jessym/rust-tcp-from-scratch
[INFO] finished tweaking git repo https://github.com/jessym/rust-tcp-from-scratch
[INFO] tweaked toml for git repo https://github.com/jessym/rust-tcp-from-scratch written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jessym/rust-tcp-from-scratch 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/jessym/rust-tcp-from-scratch 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 37a4d54c3cfad23edd09167dc094d74465c562dc71201784ef07c787410b0796
[INFO] running `Command { std: "docker" "start" "-a" "37a4d54c3cfad23edd09167dc094d74465c562dc71201784ef07c787410b0796", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37a4d54c3cfad23edd09167dc094d74465c562dc71201784ef07c787410b0796", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37a4d54c3cfad23edd09167dc094d74465c562dc71201784ef07c787410b0796", kill_on_drop: false }`
[INFO] [stdout] 37a4d54c3cfad23edd09167dc094d74465c562dc71201784ef07c787410b0796
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 8d3cbac11a099207529b62ce79d330d5bac6ef1d2f0d2495008c03079dafeb94
[INFO] running `Command { std: "docker" "start" "-a" "8d3cbac11a099207529b62ce79d330d5bac6ef1d2f0d2495008c03079dafeb94", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking etherparse v0.14.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking parking_lot v0.9.0
[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 tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tun-tap v0.1.4
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.18
[INFO] [stderr]     Checking rust-tcp-from-scratch v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/tcp.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     todo!(),
[INFO] [stdout]    |                     ------- any code following this expression is unreachable
[INFO] [stdout] 70 |                     todo!(),
[INFO] [stdout]    |                     ^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/tcp.rs:78:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     todo!(),
[INFO] [stdout]    |                     ------- any code following this expression is unreachable
[INFO] [stdout] 78 |                     IpNumber::TCP,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/tcp.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     todo!(),
[INFO] [stdout]    |                     ------- any code following this expression is unreachable
[INFO] [stdout] 70 |                     todo!(),
[INFO] [stdout]    |                     ^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/tcp.rs:78:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     todo!(),
[INFO] [stdout]    |                     ------- any code following this expression is unreachable
[INFO] [stdout] 78 |                     IpNumber::TCP,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let mut buffer = [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: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let mut buffer = [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: `interface`
[INFO] [stdout]   --> src/tcp.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         interface: &Iface,
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interface`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buffer`
[INFO] [stdout]   --> src/tcp.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let mut buffer = [0u8; 1500];
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tcp_response`
[INFO] [stdout]   --> src/tcp.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 let mut tcp_response = TcpHeader::new(
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tcp_response`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interface`
[INFO] [stdout]   --> src/tcp.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         interface: &Iface,
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interface`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buffer`
[INFO] [stdout]   --> src/tcp.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let mut buffer = [0u8; 1500];
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tcp_response`
[INFO] [stdout]   --> src/tcp.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 let mut tcp_response = TcpHeader::new(
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tcp_response`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Closed`, `SynRcvd`, and `Estab` are never constructed
[INFO] [stdout]   --> src/tcp.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | enum State {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout]  7 |     Closed,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]  8 |     Listen,
[INFO] [stdout]  9 |     SynRcvd,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 10 |     Estab,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `State` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Closed`, `SynRcvd`, and `Estab` are never constructed
[INFO] [stdout]   --> src/tcp.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | enum State {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout]  7 |     Closed,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]  8 |     Listen,
[INFO] [stdout]  9 |     SynRcvd,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 10 |     Estab,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `State` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.10s
[INFO] running `Command { std: "docker" "inspect" "8d3cbac11a099207529b62ce79d330d5bac6ef1d2f0d2495008c03079dafeb94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d3cbac11a099207529b62ce79d330d5bac6ef1d2f0d2495008c03079dafeb94", kill_on_drop: false }`
[INFO] [stdout] 8d3cbac11a099207529b62ce79d330d5bac6ef1d2f0d2495008c03079dafeb94
