[INFO] cloning repository https://github.com/emilio/nn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emilio/nn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femilio%2Fnn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femilio%2Fnn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8cda885b450db2983bd4b503ff00a19cba5dce0
[INFO] testing emilio/nn against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femilio%2Fnn" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emilio/nn on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emilio/nn
[INFO] finished tweaking git repo https://github.com/emilio/nn
[INFO] tweaked toml for git repo https://github.com/emilio/nn written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/emilio/nn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cmake v0.1.24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbc62488fa991b7222ba1d37ea03480ace08851892e7179151938406686e0558
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bbc62488fa991b7222ba1d37ea03480ace08851892e7179151938406686e0558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbc62488fa991b7222ba1d37ea03480ace08851892e7179151938406686e0558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbc62488fa991b7222ba1d37ea03480ace08851892e7179151938406686e0558", kill_on_drop: false }`
[INFO] [stdout] bbc62488fa991b7222ba1d37ea03480ace08851892e7179151938406686e0558
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7dc4c36a1899b814d2fc58a7cbbe227026ca73c13985399f376fe5335bdfd3ff
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7dc4c36a1899b814d2fc58a7cbbe227026ca73c13985399f376fe5335bdfd3ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.49
[INFO] [stderr]    Compiling bitflags v0.8.2
[INFO] [stderr]    Compiling unicode-segmentation v1.2.0
[INFO] [stderr]    Compiling term_size v0.3.0
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling clap v2.24.2
[INFO] [stderr]    Compiling cmake v0.1.24
[INFO] [stderr]    Compiling neural-networks-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `slice` is imported redundantly
[INFO] [stdout]    --> src/main.rs:527:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | use std::{io, fs, path, slice};
[INFO] [stdout]     |                         ----- the item `slice` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 527 |     use std::slice;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `slice` is imported redundantly
[INFO] [stdout]    --> src/main.rs:546:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | use std::{io, fs, path, slice};
[INFO] [stdout]     |                         ----- the item `slice` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 546 |     use std::slice;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:215:21
[INFO] [stdout]     |
[INFO] [stdout] 215 |             let (l, mut r) = self.layers.split_at_mut(i);
[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/main.rs:226:17
[INFO] [stdout]     |
[INFO] [stdout] 226 |             let mut output_layer = self.layers.last_mut().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                 let mut this_layer = match iter.next() {
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:259:24
[INFO] [stdout]     |
[INFO] [stdout] 259 |         while let Some(mut previous_layer) = next {
[INFO] [stdout]     |                        ----^^^^^^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:260:17
[INFO] [stdout]     |
[INFO] [stdout] 260 |             let mut this_layer = match iter.next() {
[INFO] [stdout]     |                 ----^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.30s
[INFO] running `Command { std: "docker" "inspect" "7dc4c36a1899b814d2fc58a7cbbe227026ca73c13985399f376fe5335bdfd3ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dc4c36a1899b814d2fc58a7cbbe227026ca73c13985399f376fe5335bdfd3ff", kill_on_drop: false }`
[INFO] [stdout] 7dc4c36a1899b814d2fc58a7cbbe227026ca73c13985399f376fe5335bdfd3ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 838c261c05cb2890143c7d503b79b0978dc1726f307ef61aeb33ba9c93512118
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "838c261c05cb2890143c7d503b79b0978dc1726f307ef61aeb33ba9c93512118", 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]    Compiling neural-networks-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `slice` is imported redundantly
[INFO] [stdout]    --> src/main.rs:527:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | use std::{io, fs, path, slice};
[INFO] [stdout]     |                         ----- the item `slice` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 527 |     use std::slice;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `slice` is imported redundantly
[INFO] [stdout]    --> src/main.rs:546:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | use std::{io, fs, path, slice};
[INFO] [stdout]     |                         ----- the item `slice` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 546 |     use std::slice;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:215:21
[INFO] [stdout]     |
[INFO] [stdout] 215 |             let (l, mut r) = self.layers.split_at_mut(i);
[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/main.rs:226:17
[INFO] [stdout]     |
[INFO] [stdout] 226 |             let mut output_layer = self.layers.last_mut().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                 let mut this_layer = match iter.next() {
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:259:24
[INFO] [stdout]     |
[INFO] [stdout] 259 |         while let Some(mut previous_layer) = next {
[INFO] [stdout]     |                        ----^^^^^^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:260:17
[INFO] [stdout]     |
[INFO] [stdout] 260 |             let mut this_layer = match iter.next() {
[INFO] [stdout]     |                 ----^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "838c261c05cb2890143c7d503b79b0978dc1726f307ef61aeb33ba9c93512118", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "838c261c05cb2890143c7d503b79b0978dc1726f307ef61aeb33ba9c93512118", kill_on_drop: false }`
[INFO] [stdout] 838c261c05cb2890143c7d503b79b0978dc1726f307ef61aeb33ba9c93512118
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5a640d4c834d11c593664497cbfcefbfa07e1c7d04d89b69d9c0fb3341a4e2cc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5a640d4c834d11c593664497cbfcefbfa07e1c7d04d89b69d9c0fb3341a4e2cc", kill_on_drop: false }`
[INFO] [stderr] warning: the item `slice` is imported redundantly
[INFO] [stderr]    --> src/main.rs:527:9
[INFO] [stderr]     |
[INFO] [stderr] 23  | use std::{io, fs, path, slice};
[INFO] [stderr]     |                         ----- the item `slice` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 527 |     use std::slice;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `slice` is imported redundantly
[INFO] [stderr]    --> src/main.rs:546:9
[INFO] [stderr]     |
[INFO] [stderr] 23  | use std::{io, fs, path, slice};
[INFO] [stderr]     |                         ----- the item `slice` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 546 |     use std::slice;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:215:21
[INFO] [stderr]     |
[INFO] [stderr] 215 |             let (l, mut r) = self.layers.split_at_mut(i);
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:226:17
[INFO] [stderr]     |
[INFO] [stderr] 226 |             let mut output_layer = self.layers.last_mut().unwrap();
[INFO] [stderr]     |                 ----^^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:238:21
[INFO] [stderr]     |
[INFO] [stderr] 238 |                 let mut this_layer = match iter.next() {
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:259:24
[INFO] [stderr]     |
[INFO] [stderr] 259 |         while let Some(mut previous_layer) = next {
[INFO] [stderr]     |                        ----^^^^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:260:17
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let mut this_layer = match iter.next() {
[INFO] [stderr]     |                 ----^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/neural_networks_practice-f8ca3a3069fe7bf1
[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 `Command { std: "docker" "inspect" "5a640d4c834d11c593664497cbfcefbfa07e1c7d04d89b69d9c0fb3341a4e2cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a640d4c834d11c593664497cbfcefbfa07e1c7d04d89b69d9c0fb3341a4e2cc", kill_on_drop: false }`
[INFO] [stdout] 5a640d4c834d11c593664497cbfcefbfa07e1c7d04d89b69d9c0fb3341a4e2cc
