[INFO] cloning repository https://github.com/ahmed2929/implementing_TCP_protocol-using-Rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ahmed2929/implementing_TCP_protocol-using-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahmed2929%2Fimplementing_TCP_protocol-using-Rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahmed2929%2Fimplementing_TCP_protocol-using-Rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5834f56a6c47554b60cef0778cf61b723b3dbec3 [INFO] checking ahmed2929/implementing_TCP_protocol-using-Rust/5834f56a6c47554b60cef0778cf61b723b3dbec3 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahmed2929%2Fimplementing_TCP_protocol-using-Rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/ahmed2929/implementing_TCP_protocol-using-Rust on toolchain 4d98531622e1718ae0bc3c7a1ab9cd8938428452 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/ahmed2929/implementing_TCP_protocol-using-Rust [INFO] finished tweaking git repo https://github.com/ahmed2929/implementing_TCP_protocol-using-Rust [INFO] tweaked toml for git repo https://github.com/ahmed2929/implementing_TCP_protocol-using-Rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/ahmed2929/implementing_TCP_protocol-using-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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7aac57d463969689128dbc4e06053627cfe219991cc0c8ad1f0bd6a823027e88 [INFO] running `Command { std: "docker" "start" "-a" "7aac57d463969689128dbc4e06053627cfe219991cc0c8ad1f0bd6a823027e88", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7aac57d463969689128dbc4e06053627cfe219991cc0c8ad1f0bd6a823027e88", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7aac57d463969689128dbc4e06053627cfe219991cc0c8ad1f0bd6a823027e88", kill_on_drop: false }` [INFO] [stdout] 7aac57d463969689128dbc4e06053627cfe219991cc0c8ad1f0bd6a823027e88 [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 -Dtail_expr_drop_order" "-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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5ed18bf0a90e25e65cd535f432966d1c39ff5da87c8c4c4e80118dcacd6034f4 [INFO] running `Command { std: "docker" "start" "-a" "5ed18bf0a90e25e65cd535f432966d1c39ff5da87c8c4c4e80118dcacd6034f4", kill_on_drop: false }` [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Compiling libc v0.2.77 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Checking futures v0.1.29 [INFO] [stderr] Compiling log v0.4.11 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Compiling memoffset v0.5.5 [INFO] [stderr] Compiling crossbeam-epoch v0.8.2 [INFO] [stderr] Checking lock_api v0.3.4 [INFO] [stderr] Compiling cc v1.0.59 [INFO] [stderr] Checking scoped-tls v0.1.2 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Checking smallvec v0.6.13 [INFO] [stderr] Checking etherparse v0.8.3 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Compiling tun-tap v0.1.2 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking net2 v0.2.35 [INFO] [stderr] Checking crossbeam-queue v0.2.3 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking mio v0.6.22 [INFO] [stderr] Checking crossbeam-deque v0.7.3 [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] Checking mio-uds v0.6.8 [INFO] [stderr] Checking tokio-codec v0.1.2 [INFO] [stderr] Checking tokio-reactor v0.1.12 [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-fs v0.1.7 [INFO] [stderr] Checking tokio v0.1.22 [INFO] [stderr] Checking tokio-core v0.1.17 [INFO] [stderr] Checking TCP_Rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/main.rs:53:2 [INFO] [stdout] | [INFO] [stdout] 4 | / loop{ [INFO] [stdout] 5 | | let nic=tun_tap::Iface::new("tun0", tun_tap::Mode::Tun)?; [INFO] [stdout] 6 | | let mut buffer = [0; 512]; [INFO] [stdout] 7 | | let Number_of_bytes=nic.recv(&mut buffer[..])?; [INFO] [stdout] ... | [INFO] [stdout] 50 | | [INFO] [stdout] 51 | | } [INFO] [stdout] | |_____- any code following this expression is unreachable [INFO] [stdout] 52 | [INFO] [stdout] 53 | Ok(()) [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/main.rs:53:2 [INFO] [stdout] | [INFO] [stdout] 4 | / loop{ [INFO] [stdout] 5 | | let nic=tun_tap::Iface::new("tun0", tun_tap::Mode::Tun)?; [INFO] [stdout] 6 | | let mut buffer = [0; 512]; [INFO] [stdout] 7 | | let Number_of_bytes=nic.recv(&mut buffer[..])?; [INFO] [stdout] ... | [INFO] [stdout] 50 | | [INFO] [stdout] 51 | | } [INFO] [stdout] | |_____- any code following this expression is unreachable [INFO] [stdout] 52 | [INFO] [stdout] 53 | Ok(()) [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ether_net_flags` [INFO] [stdout] --> src/main.rs:10:10 [INFO] [stdout] | [INFO] [stdout] 10 | let ether_net_flags=u16::from_be_bytes([buffer[0],buffer[1]]); [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ether_net_flags` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ether_net_flags` [INFO] [stdout] --> src/main.rs:10:10 [INFO] [stdout] | [INFO] [stdout] 10 | let ether_net_flags=u16::from_be_bytes([buffer[0],buffer[1]]); [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ether_net_flags` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/main.rs:16:12 [INFO] [stdout] | [INFO] [stdout] 5 | let nic=tun_tap::Iface::new("tun0", tun_tap::Mode::Tun)?; [INFO] [stdout] | --- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 16 | match etherparse::Ipv4HeaderSlice::from_slice(&buffer[4..Number_of_bytes]){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `Number_of_bytes` should have a snake case name [INFO] [stdout] --> src/main.rs:7:6 [INFO] [stdout] | [INFO] [stdout] 7 | let Number_of_bytes=nic.recv(&mut buffer[..])?; [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `number_of_bytes` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/main.rs:16:12 [INFO] [stdout] | [INFO] [stdout] 5 | let nic=tun_tap::Iface::new("tun0", tun_tap::Mode::Tun)?; [INFO] [stdout] | --- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 16 | match etherparse::Ipv4HeaderSlice::from_slice(&buffer[4..Number_of_bytes]){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `Number_of_bytes` should have a snake case name [INFO] [stdout] --> src/main.rs:7:6 [INFO] [stdout] | [INFO] [stdout] 7 | let Number_of_bytes=nic.recv(&mut buffer[..])?; [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `number_of_bytes` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `TCP_Rust` (bin "TCP_Rust" test) due to 2 previous errors; 3 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `TCP_Rust` (bin "TCP_Rust") due to 2 previous errors; 3 warnings emitted [INFO] running `Command { std: "docker" "inspect" "5ed18bf0a90e25e65cd535f432966d1c39ff5da87c8c4c4e80118dcacd6034f4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5ed18bf0a90e25e65cd535f432966d1c39ff5da87c8c4c4e80118dcacd6034f4", kill_on_drop: false }` [INFO] [stdout] 5ed18bf0a90e25e65cd535f432966d1c39ff5da87c8c4c4e80118dcacd6034f4