[INFO] cloning repository https://github.com/Eson-Jia/rust-play-ground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Eson-Jia/rust-play-ground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00e6492cae6cc71f1a2941facb2865401810ebec
[INFO] checking Eson-Jia/rust-play-ground against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEson-Jia%2Frust-play-ground" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Eson-Jia/rust-play-ground on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Eson-Jia/rust-play-ground
[INFO] finished tweaking git repo https://github.com/Eson-Jia/rust-play-ground
[INFO] tweaked toml for git repo https://github.com/Eson-Jia/rust-play-ground written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Eson-Jia/rust-play-ground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afabed8129ab7bb9d308a9181b58654b6c1be0244e4c4e1b50eaf197cca7e866
[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" "afabed8129ab7bb9d308a9181b58654b6c1be0244e4c4e1b50eaf197cca7e866", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afabed8129ab7bb9d308a9181b58654b6c1be0244e4c4e1b50eaf197cca7e866", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afabed8129ab7bb9d308a9181b58654b6c1be0244e4c4e1b50eaf197cca7e866", kill_on_drop: false }`
[INFO] [stdout] afabed8129ab7bb9d308a9181b58654b6c1be0244e4c4e1b50eaf197cca7e866
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cd1f4117670229cf8647540e86eb360dbacaf7025e8bdaa5fc825d97721aca2
[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" "7cd1f4117670229cf8647540e86eb360dbacaf7025e8bdaa5fc825d97721aca2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking play-ground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> src/bin/data_type.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let c = 'a';
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `five_hundred`
[INFO] [stdout]   --> src/bin/data_type.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let five_hundred = tup.0;
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_five_hundred`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six_point_four`
[INFO] [stdout]   --> src/bin/data_type.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let six_point_four = tup.1;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_six_point_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `one`
[INFO] [stdout]   --> src/bin/data_type.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let one = tup.2;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/data_type.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let a =[1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/data_type.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let a:[i32;5]= [1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]   --> src/bin/data_type.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let first = a[0];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]   --> src/bin/data_type.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let second  = a[1];
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/bin/data_type.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let[a0,a1,a2,a3,a4] = a;
[INFO] [stdout]    |               ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a3`
[INFO] [stdout]   --> src/bin/data_type.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let[a0,a1,a2,a3,a4] = a;
[INFO] [stdout]    |                  ^^ help: if this is intentional, prefix it with an underscore: `_a3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a4`
[INFO] [stdout]   --> src/bin/data_type.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let[a0,a1,a2,a3,a4] = a;
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_a4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> src/bin/data_type.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let c = 'a';
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `five_hundred`
[INFO] [stdout]   --> src/bin/data_type.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let five_hundred = tup.0;
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_five_hundred`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six_point_four`
[INFO] [stdout]   --> src/bin/data_type.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let six_point_four = tup.1;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_six_point_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `one`
[INFO] [stdout]   --> src/bin/data_type.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let one = tup.2;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/data_type.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let a =[1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/data_type.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let a:[i32;5]= [1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]   --> src/bin/data_type.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let first = a[0];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]   --> src/bin/data_type.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let second  = a[1];
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/bin/data_type.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let[a0,a1,a2,a3,a4] = a;
[INFO] [stdout]    |               ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a3`
[INFO] [stdout]   --> src/bin/data_type.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let[a0,a1,a2,a3,a4] = a;
[INFO] [stdout]    |                  ^^ help: if this is intentional, prefix it with an underscore: `_a3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a4`
[INFO] [stdout]   --> src/bin/data_type.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let[a0,a1,a2,a3,a4] = a;
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_a4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.47s
[INFO] running `Command { std: "docker" "inspect" "7cd1f4117670229cf8647540e86eb360dbacaf7025e8bdaa5fc825d97721aca2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd1f4117670229cf8647540e86eb360dbacaf7025e8bdaa5fc825d97721aca2", kill_on_drop: false }`
[INFO] [stdout] 7cd1f4117670229cf8647540e86eb360dbacaf7025e8bdaa5fc825d97721aca2