[INFO] updating cached repository https://github.com/SkyZH/mnist.rs
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70b95e47ea15cbbfe2d7ba45bde0fc64a17971fa
[INFO] checking SkyZH/mnist.rs against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSkyZH%2Fmnist.rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SkyZH/mnist.rs on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SkyZH/mnist.rs
[INFO] finished tweaking git repo https://github.com/SkyZH/mnist.rs
[INFO] tweaked toml for git repo https://github.com/SkyZH/mnist.rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/SkyZH/mnist.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 198ccac861cb27d5d0cb780c3105a8cece85ce5db9fedef4c407dee8f0a9e65f
[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" "198ccac861cb27d5d0cb780c3105a8cece85ce5db9fedef4c407dee8f0a9e65f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "198ccac861cb27d5d0cb780c3105a8cece85ce5db9fedef4c407dee8f0a9e65f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "198ccac861cb27d5d0cb780c3105a8cece85ce5db9fedef4c407dee8f0a9e65f", kill_on_drop: false }`
[INFO] [stdout] 198ccac861cb27d5d0cb780c3105a8cece85ce5db9fedef4c407dee8f0a9e65f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f76dc7e8bcffcbefdb218b59643676924fb580d6bdb476cc681914bcfaa6c30a
[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" "f76dc7e8bcffcbefdb218b59643676924fb580d6bdb476cc681914bcfaa6c30a", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking mnist v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking mnist-deep-learning v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/network/network.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub layers: Vec<Box<Layer + Sync>>
[INFO] [stdout]   |                         ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/network/network.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(layers: Vec<Box<Layer + Sync>>) -> Self {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/network/network.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub layers: Vec<Box<Layer + Sync>>
[INFO] [stdout]   |                         ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/network/network.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(layers: Vec<Box<Layer + Sync>>) -> Self {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BaseMatrix`, `Matrix`
[INFO] [stdout]  --> src/main.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 6 |     matrix::{BaseMatrix, Matrix},
[INFO] [stdout]   |              ^^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/network/network.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub layers: Vec<Box<Layer + Sync>>
[INFO] [stdout]   |                         ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/network/network.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(layers: Vec<Box<Layer + Sync>>) -> Self {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BaseMatrix`, `Matrix`
[INFO] [stdout]  --> src/main.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 6 |     matrix::{BaseMatrix, Matrix},
[INFO] [stdout]   |              ^^^^^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/network/network.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub layers: Vec<Box<Layer + Sync>>
[INFO] [stdout]   |                         ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/network/network.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(layers: Vec<Box<Layer + Sync>>) -> Self {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn Layer + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_test`
[INFO] [stdout]   --> src/network/network.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new_test() -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]  --> src/dataset.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     data: Mnist,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]  --> src/dataset.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     data: Mnist,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.53s
[INFO] running `Command { std: "docker" "inspect" "f76dc7e8bcffcbefdb218b59643676924fb580d6bdb476cc681914bcfaa6c30a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f76dc7e8bcffcbefdb218b59643676924fb580d6bdb476cc681914bcfaa6c30a", kill_on_drop: false }`
[INFO] [stdout] f76dc7e8bcffcbefdb218b59643676924fb580d6bdb476cc681914bcfaa6c30a