[INFO] cloning repository https://github.com/lmorais-dev/ml-demo-neural-net-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lmorais-dev/ml-demo-neural-net-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmorais-dev%2Fml-demo-neural-net-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmorais-dev%2Fml-demo-neural-net-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fed9c9e33924b2a9bc458f7ee9cc5864cb7651d6
[INFO] building lmorais-dev/ml-demo-neural-net-rust against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmorais-dev%2Fml-demo-neural-net-rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lmorais-dev/ml-demo-neural-net-rust on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lmorais-dev/ml-demo-neural-net-rust
[INFO] finished tweaking git repo https://github.com/lmorais-dev/ml-demo-neural-net-rust
[INFO] tweaked toml for git repo https://github.com/lmorais-dev/ml-demo-neural-net-rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lmorais-dev/ml-demo-neural-net-rust 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e9c1bf8bd64b202680cb59b21c0d0a2320b44bd821771fd20b0c342efc82962
[INFO] running `Command { std: "docker" "start" "-a" "5e9c1bf8bd64b202680cb59b21c0d0a2320b44bd821771fd20b0c342efc82962", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e9c1bf8bd64b202680cb59b21c0d0a2320b44bd821771fd20b0c342efc82962", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e9c1bf8bd64b202680cb59b21c0d0a2320b44bd821771fd20b0c342efc82962", kill_on_drop: false }`
[INFO] [stdout] 5e9c1bf8bd64b202680cb59b21c0d0a2320b44bd821771fd20b0c342efc82962
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 318ae0c57ef0049fe7b318df8eb31aea9c20c50e6116bee288ed56f637066d43
[INFO] running `Command { std: "docker" "start" "-a" "318ae0c57ef0049fe7b318df8eb31aea9c20c50e6116bee288ed56f637066d43", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust-nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/network.rs:86:21
[INFO] [stdout]    |
[INFO] [stdout] 86 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `OutOfBounds` and `UnexpectedMappingResult` are never constructed
[INFO] [stdout]  --> src/matrix.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum MatrixError {
[INFO] [stdout]   |          ----------- variants in this enum
[INFO] [stdout] 5 |     OutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 6 |     DimensionMismatch,
[INFO] [stdout] 7 |     UnexpectedMappingResult
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MatrixError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/network.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     InternalComputationError(MatrixError)
[INFO] [stdout]   |     ------------------------ ^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `NetworkError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 |     InternalComputationError(())
[INFO] [stdout]   |                              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.02s
[INFO] running `Command { std: "docker" "inspect" "318ae0c57ef0049fe7b318df8eb31aea9c20c50e6116bee288ed56f637066d43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "318ae0c57ef0049fe7b318df8eb31aea9c20c50e6116bee288ed56f637066d43", kill_on_drop: false }`
[INFO] [stdout] 318ae0c57ef0049fe7b318df8eb31aea9c20c50e6116bee288ed56f637066d43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f67621611a1247140fab23b456b8bc8b40c8e096f7654a1f2f2ee26eeb1b4b8a
[INFO] running `Command { std: "docker" "start" "-a" "f67621611a1247140fab23b456b8bc8b40c8e096f7654a1f2f2ee26eeb1b4b8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/network.rs:86:21
[INFO] [stdout]    |
[INFO] [stdout] 86 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `OutOfBounds` and `UnexpectedMappingResult` are never constructed
[INFO] [stdout]  --> src/matrix.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum MatrixError {
[INFO] [stdout]   |          ----------- variants in this enum
[INFO] [stdout] 5 |     OutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 6 |     DimensionMismatch,
[INFO] [stdout] 7 |     UnexpectedMappingResult
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MatrixError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/network.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     InternalComputationError(MatrixError)
[INFO] [stdout]   |     ------------------------ ^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `NetworkError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 |     InternalComputationError(())
[INFO] [stdout]   |                              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "f67621611a1247140fab23b456b8bc8b40c8e096f7654a1f2f2ee26eeb1b4b8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f67621611a1247140fab23b456b8bc8b40c8e096f7654a1f2f2ee26eeb1b4b8a", kill_on_drop: false }`
[INFO] [stdout] f67621611a1247140fab23b456b8bc8b40c8e096f7654a1f2f2ee26eeb1b4b8a