[INFO] updating cached repository code0100fun/rust-fft
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/code0100fun/rust-fft
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/code0100fun/rust-fft" "work/ex/beta-1.38-1/sources/1.37.0/gh/code0100fun/rust-fft"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/code0100fun/rust-fft'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/code0100fun/rust-fft" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/code0100fun/rust-fft"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/code0100fun/rust-fft'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f5600ab6728b85cf90ebf19fd2e9c7a6b19f45f2
[INFO] sha for GitHub repo code0100fun/rust-fft: f5600ab6728b85cf90ebf19fd2e9c7a6b19f45f2
[INFO] validating manifest of code0100fun/rust-fft on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of code0100fun/rust-fft on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing code0100fun/rust-fft
[INFO] finished frobbing code0100fun/rust-fft
[INFO] frobbed toml for code0100fun/rust-fft written to work/ex/beta-1.38-1/sources/1.37.0/gh/code0100fun/rust-fft/Cargo.toml
[INFO] started frobbing code0100fun/rust-fft
[INFO] finished frobbing code0100fun/rust-fft
[INFO] frobbed toml for code0100fun/rust-fft written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/code0100fun/rust-fft/Cargo.toml
[INFO] crate code0100fun/rust-fft already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/code0100fun/rust-fft/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing code0100fun/rust-fft against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/code0100fun/rust-fft:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f358974dba4058ed70df2ad8423e6f2c79acdfea6e0079dfde672959beb18cf0
[INFO] running `"docker" "start" "-a" "f358974dba4058ed70df2ad8423e6f2c79acdfea6e0079dfde672959beb18cf0"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/fft.rs` was erroneously implicitly accepted for library `fft`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling rust-fft v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> src/fft.rs:137:3
[INFO] [stderr]     |
[INFO] [stderr] 137 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::num::Float`
[INFO] [stderr]  --> src/fft.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::num::Float;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^ no `Float` in `num`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::num::FloatMath`
[INFO] [stderr]  --> src/fft.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::num::FloatMath;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^ no `FloatMath` in `num`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::rand`
[INFO] [stderr]   --> src/fft.rs:11:10
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::rand::{thread_rng, Rng};
[INFO] [stderr]    |          ^^^^ could not find `rand` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `range` in this scope
[INFO] [stderr]   --> src/fft.rs:69:18
[INFO] [stderr]    |
[INFO] [stderr] 69 |         for i in range(0, length) {
[INFO] [stderr]    |                  ^^^^^ not found in this scope
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use num::iter::range;
[INFO] [stderr]    |
[INFO] [stderr] 6  | use num::range;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `PI_2` in module `consts`
[INFO] [stderr]   --> src/fft.rs:79:30
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let theta = (consts::PI_2 * k) / n;
[INFO] [stderr]    |                              ^^^^ not found in `consts`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/fft.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slicing_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/fft.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(macro_rules)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `test::Bencher`
[INFO] [stderr]  --> src/fft.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use test::Bencher;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test'
[INFO] [stderr]  --> src/fft.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | extern crate test;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test'
[INFO] [stderr]  --> src/fft.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use test::Bencher;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432, E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `rust-fft`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f358974dba4058ed70df2ad8423e6f2c79acdfea6e0079dfde672959beb18cf0"`
[INFO] running `"docker" "rm" "-f" "f358974dba4058ed70df2ad8423e6f2c79acdfea6e0079dfde672959beb18cf0"`
[INFO] [stdout] f358974dba4058ed70df2ad8423e6f2c79acdfea6e0079dfde672959beb18cf0