[INFO] cloning repository https://github.com/millsmcilroy/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/millsmcilroy/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmillsmcilroy%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmillsmcilroy%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f50bccaf40d6f56c7e78cddf9481d1ea0da2be4
[INFO] checking millsmcilroy/hello-rust against try#d83b14207998f47b18a34e930157ac0d7c18b16e for pr-149137
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmillsmcilroy%2Fhello-rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/millsmcilroy/hello-rust
[INFO] finished tweaking git repo https://github.com/millsmcilroy/hello-rust
[INFO] tweaked toml for git repo https://github.com/millsmcilroy/hello-rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/millsmcilroy/hello-rust on toolchain d83b14207998f47b18a34e930157ac0d7c18b16e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/millsmcilroy/hello-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cdb7bddde21ddc7aaa8abe13b0b72ace7bcc280b6ec5f45e43ecd2679ed67562
[INFO] running `Command { std: "docker" "start" "-a" "cdb7bddde21ddc7aaa8abe13b0b72ace7bcc280b6ec5f45e43ecd2679ed67562", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cdb7bddde21ddc7aaa8abe13b0b72ace7bcc280b6ec5f45e43ecd2679ed67562", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdb7bddde21ddc7aaa8abe13b0b72ace7bcc280b6ec5f45e43ecd2679ed67562", kill_on_drop: false }`
[INFO] [stdout] cdb7bddde21ddc7aaa8abe13b0b72ace7bcc280b6ec5f45e43ecd2679ed67562
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 777533a35498a9222afd6eec4ced59fc1d9ebc5aa5936da5bb6d938a6b78d5ae
[INFO] running `Command { std: "docker" "start" "-a" "777533a35498a9222afd6eec4ced59fc1d9ebc5aa5936da5bb6d938a6b78d5ae", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut number_2: u16 = 133; // creates and assigns a mutable variable explicitly as unsigned 16 bits (logs warning b/c it is ne...
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut martini_glass = '\u{1F378}'; // char
[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]   --> main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut number_2: u16 = 133; // creates and assigns a mutable variable explicitly as unsigned 16 bits (logs warning b/c it is ne...
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut martini_glass = '\u{1F378}'; // char
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "777533a35498a9222afd6eec4ced59fc1d9ebc5aa5936da5bb6d938a6b78d5ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "777533a35498a9222afd6eec4ced59fc1d9ebc5aa5936da5bb6d938a6b78d5ae", kill_on_drop: false }`
[INFO] [stdout] 777533a35498a9222afd6eec4ced59fc1d9ebc5aa5936da5bb6d938a6b78d5ae