[INFO] cloning repository https://github.com/Miniwoffer/char_count
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Miniwoffer/char_count" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fchar_count", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fchar_count'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 11fdfc45b5b6383f65e92ac8f94edc072350518e
[INFO] checking Miniwoffer/char_count against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fchar_count" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Miniwoffer/char_count on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Miniwoffer/char_count
[INFO] finished tweaking git repo https://github.com/Miniwoffer/char_count
[INFO] tweaked toml for git repo https://github.com/Miniwoffer/char_count written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Miniwoffer/char_count already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d432ee8ba313d16d83f511158a7a2239053a13b7cd41148c1655f7387d946d3
[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" "0d432ee8ba313d16d83f511158a7a2239053a13b7cd41148c1655f7387d946d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d432ee8ba313d16d83f511158a7a2239053a13b7cd41148c1655f7387d946d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d432ee8ba313d16d83f511158a7a2239053a13b7cd41148c1655f7387d946d3", kill_on_drop: false }`
[INFO] [stdout] 0d432ee8ba313d16d83f511158a7a2239053a13b7cd41148c1655f7387d946d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 807040e74b1f9ba83d7d7bc28cf7dc3b85185f904ab6fab38e63028b28ec58c4
[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" "807040e74b1f9ba83d7d7bc28cf7dc3b85185f904ab6fab38e63028b28ec58c4", kill_on_drop: false }`
[INFO] [stderr]     Checking char_count v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ac`
[INFO] [stdout]   --> src/main.rs:13:35
[INFO] [stdout]    |
[INFO] [stdout] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stdout]    |                                   ^^ help: if this is intentional, prefix it with an underscore: `_ac`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bc`
[INFO] [stdout]   --> src/main.rs:13:43
[INFO] [stdout]    |
[INFO] [stdout] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stdout]    |                                           ^^ help: if this is intentional, prefix it with an underscore: `_bc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ac`
[INFO] [stdout]   --> src/main.rs:13:35
[INFO] [stdout]    |
[INFO] [stdout] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stdout]    |                                   ^^ help: if this is intentional, prefix it with an underscore: `_ac`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bc`
[INFO] [stdout]   --> src/main.rs:13:43
[INFO] [stdout]    |
[INFO] [stdout] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stdout]    |                                           ^^ help: if this is intentional, prefix it with an underscore: `_bc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     io::stdin().read_to_string(&mut buffer);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     io::stdin().read_to_string(&mut buffer);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "807040e74b1f9ba83d7d7bc28cf7dc3b85185f904ab6fab38e63028b28ec58c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "807040e74b1f9ba83d7d7bc28cf7dc3b85185f904ab6fab38e63028b28ec58c4", kill_on_drop: false }`
[INFO] [stdout] 807040e74b1f9ba83d7d7bc28cf7dc3b85185f904ab6fab38e63028b28ec58c4