[INFO] cloning repository https://github.com/weykon/bit-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/weykon/bit-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweykon%2Fbit-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweykon%2Fbit-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a1549009a730c218dc091734b898fdf36377d19f
[INFO] checking weykon/bit-playground against master#c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweykon%2Fbit-playground" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/weykon/bit-playground on toolchain c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/weykon/bit-playground
[INFO] finished tweaking git repo https://github.com/weykon/bit-playground
[INFO] tweaked toml for git repo https://github.com/weykon/bit-playground written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/weykon/bit-playground 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" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 148d82a6ea6146b41d560488a5f2ca2439d379d3d37f569740035a8b60c18a6d
[INFO] running `Command { std: "docker" "start" "-a" "148d82a6ea6146b41d560488a5f2ca2439d379d3d37f569740035a8b60c18a6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "148d82a6ea6146b41d560488a5f2ca2439d379d3d37f569740035a8b60c18a6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "148d82a6ea6146b41d560488a5f2ca2439d379d3d37f569740035a8b60c18a6d", kill_on_drop: false }`
[INFO] [stdout] 148d82a6ea6146b41d560488a5f2ca2439d379d3d37f569740035a8b60c18a6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6243fdfc5ecf2ef92c81295e74bfc826e8e0dadac1813911d734b72bcfb6d03f
[INFO] running `Command { std: "docker" "start" "-a" "6243fdfc5ecf2ef92c81295e74bfc826e8e0dadac1813911d734b72bcfb6d03f", kill_on_drop: false }`
[INFO] [stderr]     Checking bit_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value passed to `x` is never read
[INFO] [stdout]  --> src/mission_list/_8.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn a_bit_negation(mut x: u32, pos: usize) -> u32 {
[INFO] [stdout]   |                           ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value passed to `x` is never read
[INFO] [stdout]  --> src/mission_list/_8.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn a_bit_negation(mut x: u32, pos: usize) -> u32 {
[INFO] [stdout]   |                           ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "6243fdfc5ecf2ef92c81295e74bfc826e8e0dadac1813911d734b72bcfb6d03f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6243fdfc5ecf2ef92c81295e74bfc826e8e0dadac1813911d734b72bcfb6d03f", kill_on_drop: false }`
[INFO] [stdout] 6243fdfc5ecf2ef92c81295e74bfc826e8e0dadac1813911d734b72bcfb6d03f