[INFO] cloning repository https://github.com/wesley-lewis/SimpleMining
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wesley-lewis/SimpleMining" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwesley-lewis%2FSimpleMining", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwesley-lewis%2FSimpleMining'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a44e77c080c18077911a97eb2cd6fc653fd828ab
[INFO] checking wesley-lewis/SimpleMining against try#9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwesley-lewis%2FSimpleMining" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wesley-lewis/SimpleMining on toolchain 9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wesley-lewis/SimpleMining
[INFO] finished tweaking git repo https://github.com/wesley-lewis/SimpleMining
[INFO] tweaked toml for git repo https://github.com/wesley-lewis/SimpleMining written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wesley-lewis/SimpleMining 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" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sha256 v1.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6fcb6067cbe6c00cba803aa7e6e2676d466294cda7c5669da1bc21d39f88dbd1
[INFO] running `Command { std: "docker" "start" "-a" "6fcb6067cbe6c00cba803aa7e6e2676d466294cda7c5669da1bc21d39f88dbd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fcb6067cbe6c00cba803aa7e6e2676d466294cda7c5669da1bc21d39f88dbd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fcb6067cbe6c00cba803aa7e6e2676d466294cda7c5669da1bc21d39f88dbd1", kill_on_drop: false }`
[INFO] [stdout] 6fcb6067cbe6c00cba803aa7e6e2676d466294cda7c5669da1bc21d39f88dbd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7749839dc63b3395739251fd32a4fd96c344751be5bb305d7853a90184071318
[INFO] running `Command { std: "docker" "start" "-a" "7749839dc63b3395739251fd32a4fd96c344751be5bb305d7853a90184071318", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]     Checking cpufeatures v0.2.7
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.6
[INFO] [stderr]     Checking sha256 v1.1.3
[INFO] [stderr]     Checking mining v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `first_four_char`
[INFO] [stdout]  --> src/main.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut first_four_char: &str;
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_four_char`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_four_char`
[INFO] [stdout]  --> src/main.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut first_four_char: &str;
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_four_char`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "7749839dc63b3395739251fd32a4fd96c344751be5bb305d7853a90184071318", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7749839dc63b3395739251fd32a4fd96c344751be5bb305d7853a90184071318", kill_on_drop: false }`
[INFO] [stdout] 7749839dc63b3395739251fd32a4fd96c344751be5bb305d7853a90184071318