[INFO] cloning repository https://github.com/raphychek/Project-parallel-and-reactive-programming
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raphychek/Project-parallel-and-reactive-programming" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraphychek%2FProject-parallel-and-reactive-programming", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraphychek%2FProject-parallel-and-reactive-programming'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26112c485e2c8b9709cce43958ece8c42a70374a
[INFO] checking raphychek/Project-parallel-and-reactive-programming against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraphychek%2FProject-parallel-and-reactive-programming" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raphychek/Project-parallel-and-reactive-programming on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/raphychek/Project-parallel-and-reactive-programming
[INFO] finished tweaking git repo https://github.com/raphychek/Project-parallel-and-reactive-programming
[INFO] tweaked toml for git repo https://github.com/raphychek/Project-parallel-and-reactive-programming written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/raphychek/Project-parallel-and-reactive-programming already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] a3e1f1740cf8569d992964a5a5bb7ee03096634f6d07526885610d329cfbdc20
[INFO] running `Command { std: "docker" "start" "-a" "a3e1f1740cf8569d992964a5a5bb7ee03096634f6d07526885610d329cfbdc20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3e1f1740cf8569d992964a5a5bb7ee03096634f6d07526885610d329cfbdc20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3e1f1740cf8569d992964a5a5bb7ee03096634f6d07526885610d329cfbdc20", kill_on_drop: false }`
[INFO] [stdout] a3e1f1740cf8569d992964a5a5bb7ee03096634f6d07526885610d329cfbdc20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--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] 9027e7132c304e12a395fd38a05845184b58d135eba1c925638212aa5b709b6a
[INFO] running `Command { std: "docker" "start" "-a" "9027e7132c304e12a395fd38a05845184b58d135eba1c925638212aa5b709b6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking crossbeam-epoch v0.6.0
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]     Checking crossbeam v0.4.1
[INFO] [stderr]     Checking rrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/lib.rs:87:18
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 };
[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/lib.rs:113:18
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 };
[INFO] [stdout]     |                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parallel/single_use.rs:230:37
[INFO] [stdout]     |
[INFO] [stdout] 230 | ...                   let mut tour = Arc::new(Compteur::new(0));
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parallel/multiple_uses.rs:353:37
[INFO] [stdout]     |
[INFO] [stdout] 353 | ...                   let mut tour = Arc::new(Compteur::new(0));
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parallel/single_use.rs:230:37
[INFO] [stdout]     |
[INFO] [stdout] 230 | ...                   let mut tour = Arc::new(Compteur::new(0));
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parallel/multiple_uses.rs:353:37
[INFO] [stdout]     |
[INFO] [stdout] 353 | ...                   let mut tour = Arc::new(Compteur::new(0));
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.73s
[INFO] running `Command { std: "docker" "inspect" "9027e7132c304e12a395fd38a05845184b58d135eba1c925638212aa5b709b6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9027e7132c304e12a395fd38a05845184b58d135eba1c925638212aa5b709b6a", kill_on_drop: false }`
[INFO] [stdout] 9027e7132c304e12a395fd38a05845184b58d135eba1c925638212aa5b709b6a