[INFO] updating cached repository itsaark/helix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/itsaark/helix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/itsaark/helix" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/itsaark/helix"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/itsaark/helix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/itsaark/helix" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/itsaark/helix"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/itsaark/helix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0d1b22b227fb8e070ea84db4a46ee06186919788
[INFO] sha for GitHub repo itsaark/helix: 0d1b22b227fb8e070ea84db4a46ee06186919788
[INFO] validating manifest of itsaark/helix on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of itsaark/helix on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing itsaark/helix
[INFO] finished frobbing itsaark/helix
[INFO] frobbed toml for itsaark/helix written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/itsaark/helix/Cargo.toml
[INFO] started frobbing itsaark/helix
[INFO] finished frobbing itsaark/helix
[INFO] frobbed toml for itsaark/helix written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/itsaark/helix/Cargo.toml
[INFO] crate itsaark/helix already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking itsaark/helix against try#18481b65f318e0b4b20c0fc61340054701719d6c for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-2/try#18481b65f318e0b4b20c0fc61340054701719d6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/itsaark/helix:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 32b1a143ba3ebfd8ef1ac9c47c5ad9761eb8226c56eda18728af62416929ddcf
[INFO] running `"docker" "start" "-a" "32b1a143ba3ebfd8ef1ac9c47c5ad9761eb8226c56eda18728af62416929ddcf"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking data-encoding v2.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.71
[INFO] [stderr]     Checking helix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/compression/perceptual.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut mask = u64::from(*byte);
[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: unused variable: `i`
[INFO] [stderr]    --> src/compression/fasta.rs:211:13
[INFO] [stderr]     |
[INFO] [stderr] 211 |         for i in 0..10 {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]    --> src/compression/fasta.rs:222:13
[INFO] [stderr]     |
[INFO] [stderr] 222 |         let d = f1.distance_to(&f2);
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/compression/perceptual.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut mask = u64::from(*byte);
[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]     Finished dev [unoptimized + debuginfo] target(s) in 16.65s
[INFO] running `"docker" "inspect" "32b1a143ba3ebfd8ef1ac9c47c5ad9761eb8226c56eda18728af62416929ddcf"`
[INFO] running `"docker" "rm" "-f" "32b1a143ba3ebfd8ef1ac9c47c5ad9761eb8226c56eda18728af62416929ddcf"`
[INFO] [stdout] 32b1a143ba3ebfd8ef1ac9c47c5ad9761eb8226c56eda18728af62416929ddcf