[INFO] cloning repository https://github.com/VictorKoenders/rust_neural_network
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VictorKoenders/rust_neural_network" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVictorKoenders%2Frust_neural_network", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVictorKoenders%2Frust_neural_network'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 249a720c2e11040f4f0abb4d85041afea07bc9bd
[INFO] testing VictorKoenders/rust_neural_network against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVictorKoenders%2Frust_neural_network" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VictorKoenders/rust_neural_network on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VictorKoenders/rust_neural_network
[INFO] finished tweaking git repo https://github.com/VictorKoenders/rust_neural_network
[INFO] tweaked toml for git repo https://github.com/VictorKoenders/rust_neural_network written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/VictorKoenders/rust_neural_network already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itertools v0.6.0
[INFO] [stderr]   Downloaded c_vec v1.0.12
[INFO] [stderr]   Downloaded num-traits v0.1.37
[INFO] [stderr]   Downloaded num v0.1.37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6399369fd0fe8ff258dbc4d7026f2c7c6307ac60226a92f83e092c5a4c2b760e
[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" "6399369fd0fe8ff258dbc4d7026f2c7c6307ac60226a92f83e092c5a4c2b760e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6399369fd0fe8ff258dbc4d7026f2c7c6307ac60226a92f83e092c5a4c2b760e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6399369fd0fe8ff258dbc4d7026f2c7c6307ac60226a92f83e092c5a4c2b760e", kill_on_drop: false }`
[INFO] [stdout] 6399369fd0fe8ff258dbc4d7026f2c7c6307ac60226a92f83e092c5a4c2b760e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 553f6ce13ba3ffef5415b71fefcc6283375a608a55304ca4fd68662a23355fdf
[INFO] running `Command { std: "docker" "start" "-a" "553f6ce13ba3ffef5415b71fefcc6283375a608a55304ca4fd68662a23355fdf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling either v1.1.0
[INFO] [stderr]    Compiling c_vec v1.0.12
[INFO] [stderr]    Compiling num-integer v0.1.34
[INFO] [stderr]    Compiling sdl2-sys v0.30.0
[INFO] [stderr]    Compiling itertools v0.6.0
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling sdl2 v0.30.0
[INFO] [stderr]    Compiling rust_nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/nn/neural_network.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |         ((self.x - other.x).powf(2f32) + (self.y - other.y).powf(2f32))
[INFO] [stdout]     |         ^                                                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 114 -         ((self.x - other.x).powf(2f32) + (self.y - other.y).powf(2f32))
[INFO] [stdout] 114 +         (self.x - other.x).powf(2f32) + (self.y - other.y).powf(2f32)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/nn/neural_network.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         ((self.x - point.0).powf(2f32) + (self.y - point.1).powf(2f32))
[INFO] [stdout]     |         ^                                                             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 117 -         ((self.x - point.0).powf(2f32) + (self.y - point.1).powf(2f32))
[INFO] [stdout] 117 +         (self.x - point.0).powf(2f32) + (self.y - point.1).powf(2f32)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `step_by`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(step_by)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_nn` due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "553f6ce13ba3ffef5415b71fefcc6283375a608a55304ca4fd68662a23355fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "553f6ce13ba3ffef5415b71fefcc6283375a608a55304ca4fd68662a23355fdf", kill_on_drop: false }`
[INFO] [stdout] 553f6ce13ba3ffef5415b71fefcc6283375a608a55304ca4fd68662a23355fdf