[INFO] cloning repository https://github.com/sjeohp/waveform_space
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjeohp/waveform_space" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjeohp%2Fwaveform_space", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjeohp%2Fwaveform_space'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32314502d94bda1e2d9c13474d8ef19a6143d003
[INFO] checking sjeohp/waveform_space against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjeohp%2Fwaveform_space" "/workspace/builds/worker-104/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-104/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sjeohp/waveform_space on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sjeohp/waveform_space
[INFO] finished tweaking git repo https://github.com/sjeohp/waveform_space
[INFO] tweaked toml for git repo https://github.com/sjeohp/waveform_space written to /workspace/builds/worker-104/source/Cargo.toml
[INFO] crate git repo https://github.com/sjeohp/waveform_space already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a85517a03d60956e1040b32787fcd4eb146fe14baaf7b77b6043a3e4e6f43fe4
[INFO] running `Command { std: "docker" "start" "-a" "a85517a03d60956e1040b32787fcd4eb146fe14baaf7b77b6043a3e4e6f43fe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a85517a03d60956e1040b32787fcd4eb146fe14baaf7b77b6043a3e4e6f43fe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a85517a03d60956e1040b32787fcd4eb146fe14baaf7b77b6043a3e4e6f43fe4", kill_on_drop: false }`
[INFO] [stdout] a85517a03d60956e1040b32787fcd4eb146fe14baaf7b77b6043a3e4e6f43fe4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a93da23010379701588c227e98f0ca28196d370943a5c58161cae85088003d6a
[INFO] running `Command { std: "docker" "start" "-a" "a93da23010379701588c227e98f0ca28196d370943a5c58161cae85088003d6a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking num-traits v0.1.37
[INFO] [stderr]     Checking rustc-serialize v0.3.23
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking stream-dct v0.1.0
[INFO] [stderr]     Checking num-integer v0.1.33
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking num-bigint v0.1.37
[INFO] [stderr]     Checking num-complex v0.1.36
[INFO] [stderr]     Checking num-rational v0.1.36
[INFO] [stderr]     Checking num v0.1.37
[INFO] [stderr]     Checking rustfft v1.0.1
[INFO] [stderr]     Checking waveform_space v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::iter::Peekable`
[INFO] [stdout]  --> src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::Peekable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::Peekable`
[INFO] [stdout]  --> src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::Peekable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filterbank`
[INFO] [stdout]    --> src/lib.rs:130:10
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut filterbank = [0; 26];
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filterbank`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:130:6
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut filterbank = [0; 26];
[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: unused variable: `filterbank`
[INFO] [stdout]    --> src/lib.rs:130:10
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut filterbank = [0; 26];
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filterbank`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]    --> src/lib.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 |         for z in 0..10
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:130:6
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut filterbank = [0; 26];
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.59s
[INFO] running `Command { std: "docker" "inspect" "a93da23010379701588c227e98f0ca28196d370943a5c58161cae85088003d6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a93da23010379701588c227e98f0ca28196d370943a5c58161cae85088003d6a", kill_on_drop: false }`
[INFO] [stdout] a93da23010379701588c227e98f0ca28196d370943a5c58161cae85088003d6a