[INFO] fetching crate discrete_transforms 0.1.3...
[INFO] checking discrete_transforms-0.1.3 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate discrete_transforms 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate discrete_transforms 0.1.3 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate discrete_transforms 0.1.3
[INFO] finished tweaking crates.io crate discrete_transforms 0.1.3
[INFO] tweaked toml for crates.io crate discrete_transforms 0.1.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 623d57c4aa6abc15aeafd327ff718efdcac941ca513027c23c97a6b9888cd0de
[INFO] running `"docker" "start" "-a" "623d57c4aa6abc15aeafd327ff718efdcac941ca513027c23c97a6b9888cd0de"`
[INFO] [stderr]     Checking discrete_transforms v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/haar_1d.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |             let mut temp: Vec<f64> = output.iter().take(length).cloned().collect();
[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/haar_1d.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 let (mut s, mut d) =  temp.split_at(length / 2);
[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/haar_1d.rs:55:29
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 let (mut s, mut d) =  temp.split_at(length / 2);
[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/haar_1d.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |             let mut temp: Vec<f64> = output.iter().take(length).cloned().collect();
[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/haar_1d.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 let (mut s, mut d) =  temp.split_at(length / 2);
[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/haar_1d.rs:55:29
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 let (mut s, mut d) =  temp.split_at(length / 2);
[INFO] [stderr]    |                             ----^
[INFO] [stderr]    |                             |
[INFO] [stderr]    |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "623d57c4aa6abc15aeafd327ff718efdcac941ca513027c23c97a6b9888cd0de"`
[INFO] running `"docker" "rm" "-f" "623d57c4aa6abc15aeafd327ff718efdcac941ca513027c23c97a6b9888cd0de"`
[INFO] [stdout] 623d57c4aa6abc15aeafd327ff718efdcac941ca513027c23c97a6b9888cd0de