[INFO] fetching crate neuroflow 0.2.0...
[INFO] checking neuroflow-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate neuroflow 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate neuroflow 0.2.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate neuroflow 0.2.0
[INFO] finished tweaking crates.io crate neuroflow 0.2.0
[INFO] tweaked toml for crates.io crate neuroflow 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate neuroflow 0.2.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c144b784a0bc5157a86e993d0e05ac25ae58cc34ca8f5df239750a2d883d1cda
[INFO] running `Command { std: "docker" "start" "-a" "c144b784a0bc5157a86e993d0e05ac25ae58cc34ca8f5df239750a2d883d1cda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c144b784a0bc5157a86e993d0e05ac25ae58cc34ca8f5df239750a2d883d1cda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c144b784a0bc5157a86e993d0e05ac25ae58cc34ca8f5df239750a2d883d1cda", kill_on_drop: false }`
[INFO] [stdout] c144b784a0bc5157a86e993d0e05ac25ae58cc34ca8f5df239750a2d883d1cda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30ab6dc60c0fa3173548367d8e50a14100d4f0849879e872c8a43aa916daab6d
[INFO] running `Command { std: "docker" "start" "-a" "30ab6dc60c0fa3173548367d8e50a14100d4f0849879e872c8a43aa916daab6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.183
[INFO] [stderr]    Compiling libm v0.2.7
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]    Compiling serde_json v1.0.105
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling serde_derive v1.0.183
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking csv v1.2.2
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking neuroflow v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/data/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]    --> src/data/mod.rs:10:5
[INFO] [stdout]     |
[INFO] [stdout] 10  | use csv;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:126:1
[INFO] [stdout]     |
[INFO] [stdout] 126 | extern crate csv;
[INFO] [stdout]     | ----------------- the item `csv` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]    --> src/io/mod.rs:29:5
[INFO] [stdout]     |
[INFO] [stdout] 29  | use serde;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:123:1
[INFO] [stdout]     |
[INFO] [stdout] 123 | extern crate serde;
[INFO] [stdout]     | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]    --> src/io/mod.rs:30:5
[INFO] [stdout]     |
[INFO] [stdout] 30  | use serde_json;
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:124:1
[INFO] [stdout]     |
[INFO] [stdout] 124 | extern crate serde_json;
[INFO] [stdout]     | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:132:5
[INFO] [stdout]     |
[INFO] [stdout] 132 | use std::default::Default;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/data/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]    --> src/data/mod.rs:10:5
[INFO] [stdout]     |
[INFO] [stdout] 10  | use csv;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:126:1
[INFO] [stdout]     |
[INFO] [stdout] 126 | extern crate csv;
[INFO] [stdout]     | ----------------- the item `csv` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]    --> src/io/mod.rs:29:5
[INFO] [stdout]     |
[INFO] [stdout] 29  | use serde;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:123:1
[INFO] [stdout]     |
[INFO] [stdout] 123 | extern crate serde;
[INFO] [stdout]     | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]    --> src/io/mod.rs:30:5
[INFO] [stdout]     |
[INFO] [stdout] 30  | use serde_json;
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:124:1
[INFO] [stdout]     |
[INFO] [stdout] 124 | extern crate serde_json;
[INFO] [stdout]     | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:132:5
[INFO] [stdout]     |
[INFO] [stdout] 132 | use std::default::Default;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.64s
[INFO] running `Command { std: "docker" "inspect" "30ab6dc60c0fa3173548367d8e50a14100d4f0849879e872c8a43aa916daab6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30ab6dc60c0fa3173548367d8e50a14100d4f0849879e872c8a43aa916daab6d", kill_on_drop: false }`
[INFO] [stdout] 30ab6dc60c0fa3173548367d8e50a14100d4f0849879e872c8a43aa916daab6d