[INFO] cloning repository https://github.com/acje/dices
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/acje/dices" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Facje%2Fdices", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Facje%2Fdices'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e61b778adbf70690367c126b4e784c1752dce359
[INFO] checking acje/dices against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Facje%2Fdices" "/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/acje/dices on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/acje/dices
[INFO] finished tweaking git repo https://github.com/acje/dices
[INFO] tweaked toml for git repo https://github.com/acje/dices written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/acje/dices already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytecount v0.6.2
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.1
[INFO] [stderr]   Downloaded rayon v1.5.0
[INFO] [stderr]   Downloaded memoffset v0.6.1
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.0
[INFO] [stderr]   Downloaded rayon-core v1.9.0
[INFO] [stderr]   Downloaded crossbeam-deque v0.8.0
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94266b29ea7f5a6338b42dbb55981ba90aae95b4d05dfa8817a2ff5f16c93b0a
[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" "94266b29ea7f5a6338b42dbb55981ba90aae95b4d05dfa8817a2ff5f16c93b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94266b29ea7f5a6338b42dbb55981ba90aae95b4d05dfa8817a2ff5f16c93b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94266b29ea7f5a6338b42dbb55981ba90aae95b4d05dfa8817a2ff5f16c93b0a", kill_on_drop: false }`
[INFO] [stdout] 94266b29ea7f5a6338b42dbb55981ba90aae95b4d05dfa8817a2ff5f16c93b0a
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "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] 15b42446edfce92cf9f2ca8aaa26cb409d995c7a3f7e294b37cb4f37cc0cee31
[INFO] running `Command { std: "docker" "start" "-a" "15b42446edfce92cf9f2ca8aaa26cb409d995c7a3f7e294b37cb4f37cc0cee31", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking bytecount v0.6.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking dices v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `default`
[INFO] [stdout]  --> src/main.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{default, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `default`
[INFO] [stdout]  --> src/main.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{default, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `time`
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let time = Instant::now();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_time`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `time`
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let time = Instant::now();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_time`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cnt_cloned`
[INFO] [stdout]   --> src/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let mut cnt_cloned = cnt.clone();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cnt_cloned`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cnt_cloned`
[INFO] [stdout]   --> src/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let mut cnt_cloned = cnt.clone();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cnt_cloned`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let mut cnt = Arc::new(Cnt::default());
[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/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let mut cnt_cloned = cnt.clone();
[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/main.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let mut cnt = Arc::new(Cnt::default());
[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/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let mut cnt_cloned = cnt.clone();
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.93s
[INFO] running `Command { std: "docker" "inspect" "15b42446edfce92cf9f2ca8aaa26cb409d995c7a3f7e294b37cb4f37cc0cee31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15b42446edfce92cf9f2ca8aaa26cb409d995c7a3f7e294b37cb4f37cc0cee31", kill_on_drop: false }`
[INFO] [stdout] 15b42446edfce92cf9f2ca8aaa26cb409d995c7a3f7e294b37cb4f37cc0cee31