[INFO] fetching crate finitediff 0.2.0...
[INFO] checking finitediff-0.2.0 against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] extracting crate finitediff 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate finitediff 0.2.0
[INFO] finished tweaking crates.io crate finitediff 0.2.0
[INFO] tweaked toml for crates.io crate finitediff 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate finitediff 0.2.0 on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate finitediff 0.2.0 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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bb87faf37dd0d2a0c3d00c573a43a8089c966a13c33176c66f4d895beaf3d9d
[INFO] running `Command { std: "docker" "start" "-a" "3bb87faf37dd0d2a0c3d00c573a43a8089c966a13c33176c66f4d895beaf3d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bb87faf37dd0d2a0c3d00c573a43a8089c966a13c33176c66f4d895beaf3d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bb87faf37dd0d2a0c3d00c573a43a8089c966a13c33176c66f4d895beaf3d9d", kill_on_drop: false }`
[INFO] [stdout] 3bb87faf37dd0d2a0c3d00c573a43a8089c966a13c33176c66f4d895beaf3d9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b50fef812d4478a4f537b734bc238f975d3bbfb6d910f8e6065b9114eb31477
[INFO] running `Command { std: "docker" "start" "-a" "1b50fef812d4478a4f537b734bc238f975d3bbfb6d910f8e6065b9114eb31477", kill_on_drop: false }`
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking finitediff v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/bench.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             black_box(cost_vec_f64(&x));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 46 |             let _ = black_box(cost_vec_f64(&x));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/bench.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 black_box(cost_vec_f64(&x));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 let _ = black_box(cost_vec_f64(&x));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/bench.rs:65:17
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 black_box(cost_vec_f64(&x));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let _ = black_box(cost_vec_f64(&x));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/bench.rs:74:13
[INFO] [stdout]    |
[INFO] [stdout] 74 |             black_box(cost_multi_vec_f64(&x));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |             let _ = black_box(cost_multi_vec_f64(&x));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/bench.rs:83:17
[INFO] [stdout]    |
[INFO] [stdout] 83 |                 black_box(cost_multi_vec_f64(&x));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 83 |                 let _ = black_box(cost_multi_vec_f64(&x));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/bench.rs:93:17
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 black_box(cost_multi_vec_f64(&x));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 let _ = black_box(cost_multi_vec_f64(&x));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |             black_box(finitediff::vec::forward_diff(&cost_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 102 |             let _ = black_box(finitediff::vec::forward_diff(&cost_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             black_box(finitediff::vec::central_diff(&cost_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 119 |             let _ = black_box(finitediff::vec::central_diff(&cost_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:136:13
[INFO] [stdout]     |
[INFO] [stdout] 136 |             black_box(finitediff::vec::forward_jacobian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 136 |             let _ = black_box(finitediff::vec::forward_jacobian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             black_box(finitediff::vec::central_jacobian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 153 |             let _ = black_box(finitediff::vec::central_jacobian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 | /             black_box(finitediff::vec::forward_jacobian_vec_prod(
[INFO] [stdout] 172 | |                 &cost_multi_vec_f64,
[INFO] [stdout] 173 | |             )(&x, &p));
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 171 |             let _ = black_box(finitediff::vec::forward_jacobian_vec_prod(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:194:13
[INFO] [stdout]     |
[INFO] [stdout] 194 | /             black_box(finitediff::vec::central_jacobian_vec_prod(
[INFO] [stdout] 195 | |                 &cost_multi_vec_f64,
[INFO] [stdout] 196 | |             )(&x, &p));
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 194 |             let _ = black_box(finitediff::vec::central_jacobian_vec_prod(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:230:13
[INFO] [stdout]     |
[INFO] [stdout] 230 | /             black_box(finitediff::vec::forward_jacobian_pert(&cost_multi_vec_f64)(
[INFO] [stdout] 231 | |                 &x, &p2,
[INFO] [stdout] 232 | |             ));
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 230 |             let _ = black_box(finitediff::vec::forward_jacobian_pert(&cost_multi_vec_f64)(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:279:13
[INFO] [stdout]     |
[INFO] [stdout] 279 | /             black_box(finitediff::vec::central_jacobian_pert(&cost_multi_vec_f64)(
[INFO] [stdout] 280 | |                 &x, &p2,
[INFO] [stdout] 281 | |             ));
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 279 |             let _ = black_box(finitediff::vec::central_jacobian_pert(&cost_multi_vec_f64)(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:314:13
[INFO] [stdout]     |
[INFO] [stdout] 314 |             black_box(finitediff::vec::forward_hessian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 314 |             let _ = black_box(finitediff::vec::forward_hessian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:331:13
[INFO] [stdout]     |
[INFO] [stdout] 331 |             black_box(finitediff::vec::central_hessian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 331 |             let _ = black_box(finitediff::vec::central_hessian(&cost_multi_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:349:13
[INFO] [stdout]     |
[INFO] [stdout] 349 | /             black_box(finitediff::vec::forward_hessian_vec_prod(
[INFO] [stdout] 350 | |                 &cost_multi_vec_f64,
[INFO] [stdout] 351 | |             )(&x, &p));
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 349 |             let _ = black_box(finitediff::vec::forward_hessian_vec_prod(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:372:13
[INFO] [stdout]     |
[INFO] [stdout] 372 | /             black_box(finitediff::vec::central_hessian_vec_prod(
[INFO] [stdout] 373 | |                 &cost_multi_vec_f64,
[INFO] [stdout] 374 | |             )(&x, &p));
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 372 |             let _ = black_box(finitediff::vec::central_hessian_vec_prod(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:394:13
[INFO] [stdout]     |
[INFO] [stdout] 394 |             black_box(finitediff::vec::forward_hessian_nograd(&cost_vec_f64)(&x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 394 |             let _ = black_box(finitediff::vec::forward_hessian_nograd(&cost_vec_f64)(&x));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/bench.rs:412:13
[INFO] [stdout]     |
[INFO] [stdout] 412 | /             black_box(finitediff::vec::forward_hessian_nograd_sparse(
[INFO] [stdout] 413 | |                 &cost_vec_f64,
[INFO] [stdout] 414 | |             )(&x, indices));
[INFO] [stdout]     | |___________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 412 |             let _ = black_box(finitediff::vec::forward_hessian_nograd_sparse(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "1b50fef812d4478a4f537b734bc238f975d3bbfb6d910f8e6065b9114eb31477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b50fef812d4478a4f537b734bc238f975d3bbfb6d910f8e6065b9114eb31477", kill_on_drop: false }`
[INFO] [stdout] 1b50fef812d4478a4f537b734bc238f975d3bbfb6d910f8e6065b9114eb31477
