[INFO] cloning repository Nobuyuki-Tokuchi/cent_rust
[INFO] running `"git" "clone" "--bare" "git://github.com/Nobuyuki-Tokuchi/cent_rust.git" "work/cache/sources/gh/Nobuyuki-Tokuchi/cent_rust"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/Nobuyuki-Tokuchi/cent_rust'...
[INFO] running `"git" "clone" "work/cache/sources/gh/Nobuyuki-Tokuchi/cent_rust" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Nobuyuki-Tokuchi/cent_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Nobuyuki-Tokuchi/cent_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Nobuyuki-Tokuchi/cent_rust" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Nobuyuki-Tokuchi/cent_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Nobuyuki-Tokuchi/cent_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 45872c159b0064bda839464ee4f63fd66b839767
[INFO] sha for GitHub repo Nobuyuki-Tokuchi/cent_rust: 45872c159b0064bda839464ee4f63fd66b839767
[INFO] validating manifest of Nobuyuki-Tokuchi/cent_rust on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Nobuyuki-Tokuchi/cent_rust on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] finished frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] frobbed toml for Nobuyuki-Tokuchi/cent_rust written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Nobuyuki-Tokuchi/cent_rust/Cargo.toml
[INFO] started frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] finished frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] frobbed toml for Nobuyuki-Tokuchi/cent_rust written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Nobuyuki-Tokuchi/cent_rust/Cargo.toml
[INFO] crate Nobuyuki-Tokuchi/cent_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking Nobuyuki-Tokuchi/cent_rust against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-6/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Nobuyuki-Tokuchi/cent_rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cee2b7c94ed724c7eba873ec7ff009b99803e291ba844f09a672b6c056802388
[INFO] running `"docker" "start" "-a" "cee2b7c94ed724c7eba873ec7ff009b99803e291ba844f09a672b6c056802388"`
[INFO] [stderr]     Checking cent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:227:17
[INFO] [stderr]     |
[INFO] [stderr] 227 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:227:17
[INFO] [stderr]     |
[INFO] [stderr] 227 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "cee2b7c94ed724c7eba873ec7ff009b99803e291ba844f09a672b6c056802388"`
[INFO] running `"docker" "rm" "-f" "cee2b7c94ed724c7eba873ec7ff009b99803e291ba844f09a672b6c056802388"`
[INFO] [stdout] cee2b7c94ed724c7eba873ec7ff009b99803e291ba844f09a672b6c056802388