[INFO] cloning repository https://github.com/jtronge/numerical_methods
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jtronge/numerical_methods" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtronge%2Fnumerical_methods", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtronge%2Fnumerical_methods'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 534c0c0cf394ee415edaae0df35e19ccf4811b85
[INFO] checking jtronge/numerical_methods against try#802c9b5f98c16ec9d24cdfd517f740f1f3df0e29 for pr-137728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtronge%2Fnumerical_methods" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jtronge/numerical_methods on toolchain 802c9b5f98c16ec9d24cdfd517f740f1f3df0e29
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+802c9b5f98c16ec9d24cdfd517f740f1f3df0e29" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jtronge/numerical_methods
[INFO] finished tweaking git repo https://github.com/jtronge/numerical_methods
[INFO] tweaked toml for git repo https://github.com/jtronge/numerical_methods written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jtronge/numerical_methods already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+802c9b5f98c16ec9d24cdfd517f740f1f3df0e29" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+802c9b5f98c16ec9d24cdfd517f740f1f3df0e29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f23b9ee6ff1560f5c3b9fa3735014464adcc2c9eb35107643e5a4990eea2d1e7
[INFO] running `Command { std: "docker" "start" "-a" "f23b9ee6ff1560f5c3b9fa3735014464adcc2c9eb35107643e5a4990eea2d1e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f23b9ee6ff1560f5c3b9fa3735014464adcc2c9eb35107643e5a4990eea2d1e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f23b9ee6ff1560f5c3b9fa3735014464adcc2c9eb35107643e5a4990eea2d1e7", kill_on_drop: false }`
[INFO] [stdout] f23b9ee6ff1560f5c3b9fa3735014464adcc2c9eb35107643e5a4990eea2d1e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+802c9b5f98c16ec9d24cdfd517f740f1f3df0e29" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02eb5b044ba0c7207f3f6f76e8a3e3ff43613bad437102eaf2b6dd502088ca0b
[INFO] running `Command { std: "docker" "start" "-a" "02eb5b044ba0c7207f3f6f76e8a3e3ff43613bad437102eaf2b6dd502088ca0b", kill_on_drop: false }`
[INFO] [stderr]     Checking numerical_methods v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/milnes_method.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let mut y_c = y_correct(h, y[2+i], y_1[2+i], y_1[3+i], y_prime_est);
[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: `y1step`
[INFO] [stdout]    --> src/bin/changing_h.rs:103:15
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let ((y1step, err1step), (_, _)) = compute_one_two_taylor_series(x0, y0, h, compute_derivatives);
[INFO] [stdout]     |               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_y1step`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_y`
[INFO] [stdout]    --> src/bin/changing_h.rs:132:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut last_y = y;
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/changing_h.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut last_y = y;
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/milnes_method.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let mut y_c = y_correct(h, y[2+i], y_1[2+i], y_1[3+i], y_prime_est);
[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: `y1step`
[INFO] [stdout]    --> src/bin/changing_h.rs:103:15
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let ((y1step, err1step), (_, _)) = compute_one_two_taylor_series(x0, y0, h, compute_derivatives);
[INFO] [stdout]     |               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_y1step`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_y`
[INFO] [stdout]    --> src/bin/changing_h.rs:132:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut last_y = y;
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/changing_h.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut last_y = y;
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "02eb5b044ba0c7207f3f6f76e8a3e3ff43613bad437102eaf2b6dd502088ca0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02eb5b044ba0c7207f3f6f76e8a3e3ff43613bad437102eaf2b6dd502088ca0b", kill_on_drop: false }`
[INFO] [stdout] 02eb5b044ba0c7207f3f6f76e8a3e3ff43613bad437102eaf2b6dd502088ca0b