[INFO] cloning repository https://github.com/bodagovsky/rusty_parking_lot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bodagovsky/rusty_parking_lot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbodagovsky%2Frusty_parking_lot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbodagovsky%2Frusty_parking_lot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 25a3063cf279a3c71831d2a5d6532e857ac8efac
[INFO] checking bodagovsky/rusty_parking_lot against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbodagovsky%2Frusty_parking_lot" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bodagovsky/rusty_parking_lot on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bodagovsky/rusty_parking_lot
[INFO] finished tweaking git repo https://github.com/bodagovsky/rusty_parking_lot
[INFO] tweaked toml for git repo https://github.com/bodagovsky/rusty_parking_lot written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/bodagovsky/rusty_parking_lot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6c3207abaa20c7bcb03680211e7ce67bb9e766f4112808cf989da5c233f05b19
[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" "6c3207abaa20c7bcb03680211e7ce67bb9e766f4112808cf989da5c233f05b19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c3207abaa20c7bcb03680211e7ce67bb9e766f4112808cf989da5c233f05b19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c3207abaa20c7bcb03680211e7ce67bb9e766f4112808cf989da5c233f05b19", kill_on_drop: false }`
[INFO] [stdout] 6c3207abaa20c7bcb03680211e7ce67bb9e766f4112808cf989da5c233f05b19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b37e05585a45c322f1e343ceded1da5b0e36203a4e3db66a51472af2d9a4a55d
[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" "b37e05585a45c322f1e343ceded1da5b0e36203a4e3db66a51472af2d9a4a55d", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_parking_lot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/logic.rs:77:26
[INFO] [stdout]    |
[INFO] [stdout] 77 |                          {return String::from("no found slots")}}
[INFO] [stdout]    |                          ^                                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 77 -                          {return String::from("no found slots")}}
[INFO] [stdout] 77 +                          return String::from("no found slots")}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/logic.rs:90:25
[INFO] [stdout]    |
[INFO] [stdout] 90 |                         {return String::from(format!("sorry, no plates with color {}", color))}}
[INFO] [stdout]    |                         ^                                                                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 90 -                         {return String::from(format!("sorry, no plates with color {}", color))}}
[INFO] [stdout] 90 +                         return String::from(format!("sorry, no plates with color {}", color))}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/model.rs:58:14
[INFO] [stdout]    |
[INFO] [stdout] 58 |         for (key, val) in self.slots.iter() {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cap` is never read
[INFO] [stdout]   --> src/logic.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |                     let mut cap:i32 = 0;
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/logic.rs:77:26
[INFO] [stdout]    |
[INFO] [stdout] 77 |                          {return String::from("no found slots")}}
[INFO] [stdout]    |                          ^                                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 77 -                          {return String::from("no found slots")}}
[INFO] [stdout] 77 +                          return String::from("no found slots")}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/logic.rs:90:25
[INFO] [stdout]    |
[INFO] [stdout] 90 |                         {return String::from(format!("sorry, no plates with color {}", color))}}
[INFO] [stdout]    |                         ^                                                                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 90 -                         {return String::from(format!("sorry, no plates with color {}", color))}}
[INFO] [stdout] 90 +                         return String::from(format!("sorry, no plates with color {}", color))}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/model.rs:58:14
[INFO] [stdout]    |
[INFO] [stdout] 58 |         for (key, val) in self.slots.iter() {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cap` is never read
[INFO] [stdout]   --> src/logic.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |                     let mut cap:i32 = 0;
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let mut park = ParkingLot{
[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/tests.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut park = ParkingLot{
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let mut park = ParkingLot{
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tests.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut park = ParkingLot{
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "b37e05585a45c322f1e343ceded1da5b0e36203a4e3db66a51472af2d9a4a55d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b37e05585a45c322f1e343ceded1da5b0e36203a4e3db66a51472af2d9a4a55d", kill_on_drop: false }`
[INFO] [stdout] b37e05585a45c322f1e343ceded1da5b0e36203a4e3db66a51472af2d9a4a55d