[INFO] updating cached repository https://github.com/themultiplexer/rust-fft-spectrum
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c0872271d35a0de16eaca62af1fbcbd6c461aa7e
[INFO] testing themultiplexer/rust-fft-spectrum against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthemultiplexer%2Frust-fft-spectrum" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/themultiplexer/rust-fft-spectrum on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/themultiplexer/rust-fft-spectrum
[INFO] finished tweaking git repo https://github.com/themultiplexer/rust-fft-spectrum
[INFO] tweaked toml for git repo https://github.com/themultiplexer/rust-fft-spectrum written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/themultiplexer/rust-fft-spectrum already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] a957fea600a70b902f71ae6d348c0204f353be2b91f3c58ec3f98be833a15806
[INFO] running `"docker" "start" "-a" "a957fea600a70b902f71ae6d348c0204f353be2b91f3c58ec3f98be833a15806"`
[INFO] [stderr]    Compiling nb v0.1.1
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling strength_reduce v0.2.1
[INFO] [stderr]    Compiling transpose v0.1.0
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling embedded-hal v0.2.2
[INFO] [stderr]    Compiling rustfft v3.0.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling ads1x1x v0.1.0
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling spidev v0.3.0
[INFO] [stderr]    Compiling i2cdev v0.4.1
[INFO] [stderr]    Compiling sysfs_gpio v0.5.3
[INFO] [stderr]    Compiling linux-embedded-hal v0.2.2
[INFO] [stderr]    Compiling rust_gpiozero v0.1.0
[INFO] [stderr]    Compiling fft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/main.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::{thread, time};
[INFO] [stderr]   |           ^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/main.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     loop {
[INFO] [stderr] 18 | |         let value = block!(adc.read(&mut channel::SingleA0)).unwrap();
[INFO] [stderr] 19 | |         println!("Value: {}", value);
[INFO] [stderr] 20 | |         //thread::sleep(time::Duration::from_millis(50));
[INFO] [stderr] 21 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 22 |       // get I2C device back
[INFO] [stderr] 23 |       let _dev = adc.destroy_ads1115();
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.72s
[INFO] running `"docker" "inspect" "a957fea600a70b902f71ae6d348c0204f353be2b91f3c58ec3f98be833a15806"`
[INFO] running `"docker" "rm" "-f" "a957fea600a70b902f71ae6d348c0204f353be2b91f3c58ec3f98be833a15806"`
[INFO] [stdout] a957fea600a70b902f71ae6d348c0204f353be2b91f3c58ec3f98be833a15806
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 01e7cd2c8144892c0c329cf23eb3289e547116ccccd2bfb7a38581fb5b280416
[INFO] running `"docker" "start" "-a" "01e7cd2c8144892c0c329cf23eb3289e547116ccccd2bfb7a38581fb5b280416"`
[INFO] [stderr]    Compiling fft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/main.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::{thread, time};
[INFO] [stderr]   |           ^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/main.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     loop {
[INFO] [stderr] 18 | |         let value = block!(adc.read(&mut channel::SingleA0)).unwrap();
[INFO] [stderr] 19 | |         println!("Value: {}", value);
[INFO] [stderr] 20 | |         //thread::sleep(time::Duration::from_millis(50));
[INFO] [stderr] 21 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 22 |       // get I2C device back
[INFO] [stderr] 23 |       let _dev = adc.destroy_ads1115();
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "01e7cd2c8144892c0c329cf23eb3289e547116ccccd2bfb7a38581fb5b280416"`
[INFO] running `"docker" "rm" "-f" "01e7cd2c8144892c0c329cf23eb3289e547116ccccd2bfb7a38581fb5b280416"`
[INFO] [stdout] 01e7cd2c8144892c0c329cf23eb3289e547116ccccd2bfb7a38581fb5b280416
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] ca9e5997521306d007190782c22cc0d86a82d386b22b47a5a972c75c4ebd188c
[INFO] running `"docker" "start" "-a" "ca9e5997521306d007190782c22cc0d86a82d386b22b47a5a972c75c4ebd188c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fft-c208c536585d38e2
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ca9e5997521306d007190782c22cc0d86a82d386b22b47a5a972c75c4ebd188c"`
[INFO] running `"docker" "rm" "-f" "ca9e5997521306d007190782c22cc0d86a82d386b22b47a5a972c75c4ebd188c"`
[INFO] [stdout] ca9e5997521306d007190782c22cc0d86a82d386b22b47a5a972c75c4ebd188c