[INFO] updating cached repository https://github.com/bencelaszlo/numerical-methods-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] 0340dc30c099869bdfde75eb56b32ae77b2b18b3
[INFO] testing bencelaszlo/numerical-methods-rust against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbencelaszlo%2Fnumerical-methods-rust" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bencelaszlo/numerical-methods-rust on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bencelaszlo/numerical-methods-rust
[INFO] finished tweaking git repo https://github.com/bencelaszlo/numerical-methods-rust
[INFO] tweaked toml for git repo https://github.com/bencelaszlo/numerical-methods-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/bencelaszlo/numerical-methods-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=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-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6e177d59335b6f6910699411a8a39021f026c1801f0acde4b360fd2991d878b6
[INFO] running `"docker" "start" "-a" "6e177d59335b6f6910699411a8a39021f026c1801f0acde4b360fd2991d878b6"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[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/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]  --> src/main.rs:6:29
[INFO] [stderr]   |
[INFO] [stderr] 6 | 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: `k`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |     for k in 0..y.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 7.43s
[INFO] running `"docker" "inspect" "6e177d59335b6f6910699411a8a39021f026c1801f0acde4b360fd2991d878b6"`
[INFO] running `"docker" "rm" "-f" "6e177d59335b6f6910699411a8a39021f026c1801f0acde4b360fd2991d878b6"`
[INFO] [stdout] 6e177d59335b6f6910699411a8a39021f026c1801f0acde4b360fd2991d878b6
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=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-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 204c1d14d345ae9478f98cd6c1f74a81f4e2b76409d51286b17050bb022e45b5
[INFO] running `"docker" "start" "-a" "204c1d14d345ae9478f98cd6c1f74a81f4e2b76409d51286b17050bb022e45b5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling numerical_methods_rust v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]  --> src/main.rs:6:29
[INFO] [stderr]   |
[INFO] [stderr] 6 | 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: `k`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |     for k in 0..y.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "204c1d14d345ae9478f98cd6c1f74a81f4e2b76409d51286b17050bb022e45b5"`
[INFO] running `"docker" "rm" "-f" "204c1d14d345ae9478f98cd6c1f74a81f4e2b76409d51286b17050bb022e45b5"`
[INFO] [stdout] 204c1d14d345ae9478f98cd6c1f74a81f4e2b76409d51286b17050bb022e45b5
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=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-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0233a82fd7decc18a11de851e29a8f2a2f99e0c3852cdfa8d335a5485536cee5
[INFO] running `"docker" "start" "-a" "0233a82fd7decc18a11de851e29a8f2a2f99e0c3852cdfa8d335a5485536cee5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stdout] 
[INFO] [stderr]  --> src/main.rs:6:29
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 6 | use std::time::{SystemTime, Duration};
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr]   |                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     for k in 0..test_numbers.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/main.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |     for k in 0..y.len() {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/numerical_methods_rust-203a0abd60981534
[INFO] running `"docker" "inspect" "0233a82fd7decc18a11de851e29a8f2a2f99e0c3852cdfa8d335a5485536cee5"`
[INFO] running `"docker" "rm" "-f" "0233a82fd7decc18a11de851e29a8f2a2f99e0c3852cdfa8d335a5485536cee5"`
[INFO] [stdout] 0233a82fd7decc18a11de851e29a8f2a2f99e0c3852cdfa8d335a5485536cee5