[INFO] updating cached repository bencelaszlo/numerical-methods-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bencelaszlo/numerical-methods-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bencelaszlo/numerical-methods-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/bencelaszlo/numerical-methods-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/bencelaszlo/numerical-methods-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bencelaszlo/numerical-methods-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bencelaszlo/numerical-methods-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bencelaszlo/numerical-methods-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2fed8a65db7c024182bae4d95fcc176e04ddee05
[INFO] sha for GitHub repo bencelaszlo/numerical-methods-rust: 2fed8a65db7c024182bae4d95fcc176e04ddee05
[INFO] validating manifest of bencelaszlo/numerical-methods-rust 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 bencelaszlo/numerical-methods-rust 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 bencelaszlo/numerical-methods-rust
[INFO] finished frobbing bencelaszlo/numerical-methods-rust
[INFO] frobbed toml for bencelaszlo/numerical-methods-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/bencelaszlo/numerical-methods-rust/Cargo.toml
[INFO] started frobbing bencelaszlo/numerical-methods-rust
[INFO] finished frobbing bencelaszlo/numerical-methods-rust
[INFO] frobbed toml for bencelaszlo/numerical-methods-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bencelaszlo/numerical-methods-rust/Cargo.toml
[INFO] crate bencelaszlo/numerical-methods-rust 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing bencelaszlo/numerical-methods-rust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bencelaszlo/numerical-methods-rust:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e29c37badb1e95bf66afc57d42e73237d8c855184fd21e40ccd8cd353d76a63b
[INFO] running `"docker" "start" "-a" "e29c37badb1e95bf66afc57d42e73237d8c855184fd21e40ccd8cd353d76a63b"`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling coarsetime v0.1.10
[INFO] [stderr]    Compiling numerical_methods_rust v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]  --> src/main.rs:8:29
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::{SystemTime, Duration};
[INFO] [stderr]   |                             ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_time`
[INFO] [stderr]   --> src/main.rs:11:6
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let start_time = SystemTime::now();
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_time`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test_numbers`
[INFO] [stderr]   --> src/main.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut test_numbers: Vec<f32> = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_test_numbers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `max_iteration`
[INFO] [stderr]   --> src/integration.rs:69:41
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn q_gauss_legendre(a: f32, b: f32, max_iteration: i32) -> f32 {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_max_iteration`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut test_numbers: Vec<f32> = Vec::new();
[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 [optimized + debuginfo] target(s) in 8.46s
[INFO] running `"docker" "inspect" "e29c37badb1e95bf66afc57d42e73237d8c855184fd21e40ccd8cd353d76a63b"`
[INFO] running `"docker" "rm" "-f" "e29c37badb1e95bf66afc57d42e73237d8c855184fd21e40ccd8cd353d76a63b"`
[INFO] [stdout] e29c37badb1e95bf66afc57d42e73237d8c855184fd21e40ccd8cd353d76a63b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bencelaszlo/numerical-methods-rust:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5ca13a0dbc0db1218190fff034e4e2c9c3512949bb36c7f0e97d063551cafe90
[INFO] running `"docker" "start" "-a" "5ca13a0dbc0db1218190fff034e4e2c9c3512949bb36c7f0e97d063551cafe90"`
[INFO] [stderr]    Compiling numerical_methods_rust v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]  --> src/main.rs:8:29
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::{SystemTime, Duration};
[INFO] [stderr]   |                             ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_time`
[INFO] [stderr]   --> src/main.rs:11:6
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let start_time = SystemTime::now();
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_time`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test_numbers`
[INFO] [stderr]   --> src/main.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut test_numbers: Vec<f32> = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_test_numbers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `max_iteration`
[INFO] [stderr]   --> src/integration.rs:69:41
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn q_gauss_legendre(a: f32, b: f32, max_iteration: i32) -> f32 {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_max_iteration`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut test_numbers: Vec<f32> = Vec::new();
[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 [optimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "5ca13a0dbc0db1218190fff034e4e2c9c3512949bb36c7f0e97d063551cafe90"`
[INFO] running `"docker" "rm" "-f" "5ca13a0dbc0db1218190fff034e4e2c9c3512949bb36c7f0e97d063551cafe90"`
[INFO] [stdout] 5ca13a0dbc0db1218190fff034e4e2c9c3512949bb36c7f0e97d063551cafe90
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bencelaszlo/numerical-methods-rust:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 9f1e1b28e0f61025cdc20151599f5a925526ec85c5e6b5f8974a8bb7a746176f
[INFO] running `"docker" "start" "-a" "9f1e1b28e0f61025cdc20151599f5a925526ec85c5e6b5f8974a8bb7a746176f"`
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/numerical_methods_rust-6aeadc43885a537d
[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" "9f1e1b28e0f61025cdc20151599f5a925526ec85c5e6b5f8974a8bb7a746176f"`
[INFO] running `"docker" "rm" "-f" "9f1e1b28e0f61025cdc20151599f5a925526ec85c5e6b5f8974a8bb7a746176f"`
[INFO] [stdout] 9f1e1b28e0f61025cdc20151599f5a925526ec85c5e6b5f8974a8bb7a746176f