[INFO] cloning repository https://github.com/StephanDollberg/PingPong
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/StephanDollberg/PingPong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephanDollberg%2FPingPong", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephanDollberg%2FPingPong'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7498571b5b0f4816a8877c3f06da7bc47960c7c0
[INFO] checking StephanDollberg/PingPong against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephanDollberg%2FPingPong" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/StephanDollberg/PingPong on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/StephanDollberg/PingPong
[INFO] finished tweaking git repo https://github.com/StephanDollberg/PingPong
[INFO] tweaked toml for git repo https://github.com/StephanDollberg/PingPong written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/StephanDollberg/PingPong already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b506d7ac9de9e9e55d327dde8681fc1eec00c53ffebbdea501e23d3dc2d09247
[INFO] running `Command { std: "docker" "start" "-a" "b506d7ac9de9e9e55d327dde8681fc1eec00c53ffebbdea501e23d3dc2d09247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b506d7ac9de9e9e55d327dde8681fc1eec00c53ffebbdea501e23d3dc2d09247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b506d7ac9de9e9e55d327dde8681fc1eec00c53ffebbdea501e23d3dc2d09247", kill_on_drop: false }`
[INFO] [stdout] b506d7ac9de9e9e55d327dde8681fc1eec00c53ffebbdea501e23d3dc2d09247
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49f0b640bc105a9c418a338ec4f18bb581fff66e55616133e721ad7ddcc7fce8
[INFO] running `Command { std: "docker" "start" "-a" "49f0b640bc105a9c418a338ec4f18bb581fff66e55616133e721ad7ddcc7fce8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking pingpong v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:98:29
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn send_data(&mut self, &[u8]) -> std::io::Result<usize>;
[INFO] [stdout]    |                             ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &[u8]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:99:29
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn recv_data(&mut self, &mut [u8]) -> std::io::Result<usize>;
[INFO] [stdout]    |                             ^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut [u8]`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:98:29
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn send_data(&mut self, &[u8]) -> std::io::Result<usize>;
[INFO] [stdout]    |                             ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &[u8]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:99:29
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn recv_data(&mut self, &mut [u8]) -> std::io::Result<usize>;
[INFO] [stdout]    |                             ^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut [u8]`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.95s
[INFO] running `Command { std: "docker" "inspect" "49f0b640bc105a9c418a338ec4f18bb581fff66e55616133e721ad7ddcc7fce8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49f0b640bc105a9c418a338ec4f18bb581fff66e55616133e721ad7ddcc7fce8", kill_on_drop: false }`
[INFO] [stdout] 49f0b640bc105a9c418a338ec4f18bb581fff66e55616133e721ad7ddcc7fce8