[INFO] cloning repository https://github.com/sutetako/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sutetako/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutetako%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutetako%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 69ae47d04f313d24b1b40ef9c7ea7c4f9920a3d0
[INFO] testing sutetako/rust_learning against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutetako%2Frust_learning" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sutetako/rust_learning on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sutetako/rust_learning
[INFO] finished tweaking git repo https://github.com/sutetako/rust_learning
[INFO] tweaked toml for git repo https://github.com/sutetako/rust_learning written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/sutetako/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", 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] 736e99c647b5b6517511b9a37a2aafe6df1ec030fc1a215ec6da8d68e65f939c
[INFO] running `Command { std: "docker" "start" "-a" "736e99c647b5b6517511b9a37a2aafe6df1ec030fc1a215ec6da8d68e65f939c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "736e99c647b5b6517511b9a37a2aafe6df1ec030fc1a215ec6da8d68e65f939c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "736e99c647b5b6517511b9a37a2aafe6df1ec030fc1a215ec6da8d68e65f939c", kill_on_drop: false }`
[INFO] [stdout] 736e99c647b5b6517511b9a37a2aafe6df1ec030fc1a215ec6da8d68e65f939c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8e96f05c6629f35327c576a7deb75af7fde7901f7dc530c32eab96e49aff527
[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" "e8e96f05c6629f35327c576a7deb75af7fde7901f7dc530c32eab96e49aff527", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `Command { std: "docker" "inspect" "e8e96f05c6629f35327c576a7deb75af7fde7901f7dc530c32eab96e49aff527", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8e96f05c6629f35327c576a7deb75af7fde7901f7dc530c32eab96e49aff527", kill_on_drop: false }`
[INFO] [stdout] e8e96f05c6629f35327c576a7deb75af7fde7901f7dc530c32eab96e49aff527
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8369aebedcc63200cac5e24c9b147ce06056f309577796320f6a9f377b627de
[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" "a8369aebedcc63200cac5e24c9b147ce06056f309577796320f6a9f377b627de", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/main.rs:245:6
[INFO] [stdout]     |
[INFO] [stdout] 245 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/main.rs:375:6
[INFO] [stdout]     |
[INFO] [stdout] 375 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/main.rs:1814:32
[INFO] [stdout]      |
[INFO] [stdout] 1814 |         fn say_hello(out: &mut Write) -> std::io::Result<()> {
[INFO] [stdout]      |                                ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/main.rs:1840:26
[INFO] [stdout]      |
[INFO] [stdout] 1840 |         let writer: &mut Write = &mut buf; // ok
[INFO] [stdout]      |                          ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right_matches`: superseded by `trim_end_matches`
[INFO] [stdout]     --> src/main.rs:1469:27
[INFO] [stdout]      |
[INFO] [stdout] 1469 |             self.plural().trim_right_matches('s')
[INFO] [stdout]      |                           ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end_matches`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0109]: type arguments are not allowed for this type
[INFO] [stdout]     --> src/main.rs:1854:15
[INFO] [stdout]      |
[INFO] [stdout] 1854 |         buf::<Vec>.write_all(b"hello").expect("error");
[INFO] [stdout]      |               ^^^ type argument not allowed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_learning` due to 2 previous errors; 5 warnings emitted
[INFO] [stdout] error: aborting due to previous error; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0109`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a8369aebedcc63200cac5e24c9b147ce06056f309577796320f6a9f377b627de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8369aebedcc63200cac5e24c9b147ce06056f309577796320f6a9f377b627de", kill_on_drop: false }`
[INFO] [stdout] a8369aebedcc63200cac5e24c9b147ce06056f309577796320f6a9f377b627de
