[INFO] cloning repository https://github.com/echochamber/rust_chat [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/echochamber/rust_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_chat", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_chat'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 254f76a923455cf4b4a0928e5d5eabe1ae8aeb1a [INFO] testing echochamber/rust_chat against 1.49.0 for beta-1.50-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_chat" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/echochamber/rust_chat on toolchain 1.49.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/echochamber/rust_chat [INFO] finished tweaking git repo https://github.com/echochamber/rust_chat [INFO] tweaked toml for git repo https://github.com/echochamber/rust_chat written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/echochamber/rust_chat already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this [INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag. [INFO] the lockfile is outdated, regenerating it [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b37db5edcd654c45ff2119321ff0a2aef370278e4e2a5c3dc3dc8c5f7a02b1fe [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "b37db5edcd654c45ff2119321ff0a2aef370278e4e2a5c3dc3dc8c5f7a02b1fe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b37db5edcd654c45ff2119321ff0a2aef370278e4e2a5c3dc3dc8c5f7a02b1fe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b37db5edcd654c45ff2119321ff0a2aef370278e4e2a5c3dc3dc8c5f7a02b1fe", kill_on_drop: false }` [INFO] [stdout] b37db5edcd654c45ff2119321ff0a2aef370278e4e2a5c3dc3dc8c5f7a02b1fe [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 1130c0514e73eaa8aab4aad3d9ff8d11646aa0b632835f509821f7b86a61855d [INFO] running `Command { std: "docker" "start" "-a" "1130c0514e73eaa8aab4aad3d9ff8d11646aa0b632835f509821f7b86a61855d", kill_on_drop: false }` [INFO] [stderr] Compiling bitflags v0.1.1 [INFO] [stderr] Compiling bytes v0.2.11 [INFO] [stderr] Compiling slab v0.1.3 [INFO] [stderr] Compiling winapi v0.1.23 [INFO] [stderr] Compiling nix v0.3.10 [INFO] [stderr] Compiling mio v0.4.4 [INFO] [stderr] Compiling simple_chat v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(convert)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/main.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | #![feature(ip_addr)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `EventLoop`, `Token` [INFO] [stdout] --> src/chat_server/connection.rs:9:11 [INFO] [stdout] | [INFO] [stdout] 9 | use mio::{Token, EventLoop, EventSet, TryRead, TryWrite, PollOpt}; [INFO] [stdout] | ^^^^^ ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `SERVER_TOKEN` [INFO] [stdout] --> src/chat_server/mod.rs:11:20 [INFO] [stdout] | [INFO] [stdout] 11 | use self::server::{SERVER_TOKEN, ChatServer}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/chat_server/connection.rs:100:21 [INFO] [stdout] | [INFO] [stdout] 100 | return match String::from_utf8(read_buf) { [INFO] [stdout] | ______________________^______- [INFO] [stdout] | | _____________________| [INFO] [stdout] | || [INFO] [stdout] 101 | || Ok(message) => { [INFO] [stdout] 102 | || return Ok(Some(message)); [INFO] [stdout] 103 | || }, [INFO] [stdout] ... || [INFO] [stdout] 106 | || } [INFO] [stdout] 107 | || } [INFO] [stdout] | || ^ [INFO] [stdout] | ||_____________________| [INFO] [stdout] | |______________________unreachable expression [INFO] [stdout] | any code following this `match` expression is unreachable, as all arms diverge [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `simple_chat` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "1130c0514e73eaa8aab4aad3d9ff8d11646aa0b632835f509821f7b86a61855d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1130c0514e73eaa8aab4aad3d9ff8d11646aa0b632835f509821f7b86a61855d", kill_on_drop: false }` [INFO] [stdout] 1130c0514e73eaa8aab4aad3d9ff8d11646aa0b632835f509821f7b86a61855d