[INFO] cloning repository https://github.com/davidpeklak/cargo-stdx-check
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidpeklak/cargo-stdx-check" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidpeklak%2Fcargo-stdx-check", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidpeklak%2Fcargo-stdx-check'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b0beb957152519476a52be3bba72611dc4064fa
[INFO] testing davidpeklak/cargo-stdx-check against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidpeklak%2Fcargo-stdx-check" "/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/davidpeklak/cargo-stdx-check on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/davidpeklak/cargo-stdx-check
[INFO] finished tweaking git repo https://github.com/davidpeklak/cargo-stdx-check
[INFO] tweaked toml for git repo https://github.com/davidpeklak/cargo-stdx-check written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/davidpeklak/cargo-stdx-check already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.1
[INFO] [stderr]   Downloaded backtrace-sys v0.1.11
[INFO] [stderr]   Downloaded serde_derive v1.0.8
[INFO] [stderr]   Downloaded toml v0.4.2
[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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2135c48a328c58bd27484ca616c8d6a90043e34d1a48f392fde1794cc46448f
[INFO] running `Command { std: "docker" "start" "-a" "a2135c48a328c58bd27484ca616c8d6a90043e34d1a48f392fde1794cc46448f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2135c48a328c58bd27484ca616c8d6a90043e34d1a48f392fde1794cc46448f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2135c48a328c58bd27484ca616c8d6a90043e34d1a48f392fde1794cc46448f", kill_on_drop: false }`
[INFO] [stdout] a2135c48a328c58bd27484ca616c8d6a90043e34d1a48f392fde1794cc46448f
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 307ae3c439ac4ffebf4cb74c6fdc2c310d22a57e1c951455cd0cabf9a6488879
[INFO] running `Command { std: "docker" "start" "-a" "307ae3c439ac4ffebf4cb74c6fdc2c310d22a57e1c951455cd0cabf9a6488879", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.24
[INFO] [stderr]    Compiling gcc v0.3.51
[INFO] [stderr]    Compiling lazy_static v0.2.8
[INFO] [stderr]    Compiling serde v1.0.8
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling cfg-if v0.1.1
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling serde_derive v1.0.8
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling toml v0.4.2
[INFO] [stderr]    Compiling docopt v0.8.1
[INFO] [stderr]    Compiling backtrace v0.3.2
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling cargo-stdx-check v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:186:13
[INFO] [stdout]     |
[INFO] [stdout] 186 |         let mut set = grouped.entry(name).or_insert(BTreeSet::new());
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.50s
[INFO] running `Command { std: "docker" "inspect" "307ae3c439ac4ffebf4cb74c6fdc2c310d22a57e1c951455cd0cabf9a6488879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "307ae3c439ac4ffebf4cb74c6fdc2c310d22a57e1c951455cd0cabf9a6488879", kill_on_drop: false }`
[INFO] [stdout] 307ae3c439ac4ffebf4cb74c6fdc2c310d22a57e1c951455cd0cabf9a6488879
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3c5cfa1956874cf7e1e0c01e42ac74179b39e51b99931a5aa50dc859cde9bec
[INFO] running `Command { std: "docker" "start" "-a" "a3c5cfa1956874cf7e1e0c01e42ac74179b39e51b99931a5aa50dc859cde9bec", kill_on_drop: false }`
[INFO] [stderr]    Compiling cargo-stdx-check v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:186:13
[INFO] [stdout]     |
[INFO] [stdout] 186 |         let mut set = grouped.entry(name).or_insert(BTreeSet::new());
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "a3c5cfa1956874cf7e1e0c01e42ac74179b39e51b99931a5aa50dc859cde9bec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3c5cfa1956874cf7e1e0c01e42ac74179b39e51b99931a5aa50dc859cde9bec", kill_on_drop: false }`
[INFO] [stdout] a3c5cfa1956874cf7e1e0c01e42ac74179b39e51b99931a5aa50dc859cde9bec
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 327956b3d6cc6b445b89f273ce1540026f9d42c3e46d8e65a62631fa94faf949
[INFO] running `Command { std: "docker" "start" "-a" "327956b3d6cc6b445b89f273ce1540026f9d42c3e46d8e65a62631fa94faf949", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/main.rs:186:13
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 186 |         let mut set = grouped.entry(name).or_insert(BTreeSet::new());
[INFO] [stdout] 
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cargo-stdx-check` (bin "cargo-stdx-check" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cargo_stdx_check-f9273dec6c9a2667)
[INFO] running `Command { std: "docker" "inspect" "327956b3d6cc6b445b89f273ce1540026f9d42c3e46d8e65a62631fa94faf949", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "327956b3d6cc6b445b89f273ce1540026f9d42c3e46d8e65a62631fa94faf949", kill_on_drop: false }`
[INFO] [stdout] 327956b3d6cc6b445b89f273ce1540026f9d42c3e46d8e65a62631fa94faf949