[INFO] fetching crate convolician 0.1.0...
[INFO] checking convolician-0.1.0 against try#2cbf9c3ff35600794d69a7dc7ab399810a067910 for pr-129249-2
[INFO] extracting crate convolician 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate convolician 0.1.0
[INFO] finished tweaking crates.io crate convolician 0.1.0
[INFO] tweaked toml for crates.io crate convolician 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate convolician 0.1.0 on toolchain 2cbf9c3ff35600794d69a7dc7ab399810a067910
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate convolician 0.1.0 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" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking convolician-0.1.0 against try#2cbf9c3ff35600794d69a7dc7ab399810a067910 for pr-129249-2
[INFO] extracting crate convolician 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate convolician 0.1.0
[INFO] finished tweaking crates.io crate convolician 0.1.0
[INFO] tweaked toml for crates.io crate convolician 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate convolician 0.1.0 on toolchain 2cbf9c3ff35600794d69a7dc7ab399810a067910
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate convolician 0.1.0 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" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getrandom v0.1.8
[INFO] [stderr]   Downloaded ndarray-rand v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0
[INFO] running `Command { std: "docker" "start" "f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0" "/opt/rustwide/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0" "/opt/rustwide/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling ndarray v0.12.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking getrandom v0.1.8
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking ndarray-rand v0.9.0
[INFO] [stderr]     Checking convolician v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/array_implementation/random_matrix.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `centre`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_centre`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `before`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let before = &m.slice(s![.., ..-2]);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_before`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `after`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let after  = &m.slice(s![.., 2.. ]);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_after`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_x`
[INFO] [stdout]   --> src/array_implementation/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let d_x = central_difference::central_difference_x(&m);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_d_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `central_difference_x_2` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn central_difference_x_2(m: &Array2<u8>) -> Array2<i16> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `centre`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_centre`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `before`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let before = &m.slice(s![.., ..-2]);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_before`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `after`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let after  = &m.slice(s![.., 2.. ]);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_after`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_x`
[INFO] [stdout]   --> src/array_implementation/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let d_x = central_difference::central_difference_x(&m);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_d_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `central_difference_x_2` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn central_difference_x_2(m: &Array2<u8>) -> Array2<i16> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_central_difference_x_negative_gradients` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn test_central_difference_x_negative_gradients() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_central_difference_x_one_column` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn test_central_difference_x_one_column() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_central_difference_x_zero_columns` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn test_central_difference_x_zero_columns() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.60s
[INFO] running `Command { std: "docker" "inspect" "f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0", kill_on_drop: false }`
[INFO] [stdout] f95e0b2a1177bfedddbbfaf61c6cd046ee17d547b1b90840c0e7eb58e49332c0
