[INFO] fetching crate ndarray-vision 0.5.1...
[INFO] checking ndarray-vision-0.5.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ndarray-vision 0.5.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ndarray-vision 0.5.1 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 ndarray-vision 0.5.1
[INFO] finished tweaking crates.io crate ndarray-vision 0.5.1
[INFO] tweaked toml for crates.io crate ndarray-vision 0.5.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate ndarray-vision 0.5.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libm v0.2.7
[INFO] [stderr]   Downloaded openblas-build v0.10.5
[INFO] [stderr]   Downloaded matrixmultiply v0.3.7
[INFO] [stderr]   Downloaded chrono v0.4.28
[INFO] [stderr]   Downloaded netlib-src v0.8.0
[INFO] [stderr]   Downloaded openblas-src v0.10.5
[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] 66ff68a43f059c1bea5b102829f1f22592d9f9a7429fb1f5f27d9ac9f493cf7e
[INFO] running `Command { std: "docker" "start" "-a" "66ff68a43f059c1bea5b102829f1f22592d9f9a7429fb1f5f27d9ac9f493cf7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66ff68a43f059c1bea5b102829f1f22592d9f9a7429fb1f5f27d9ac9f493cf7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66ff68a43f059c1bea5b102829f1f22592d9f9a7429fb1f5f27d9ac9f493cf7e", kill_on_drop: false }`
[INFO] [stdout] 66ff68a43f059c1bea5b102829f1f22592d9f9a7429fb1f5f27d9ac9f493cf7e
[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] ff005655309f63fd70ce1a46e095616adc870d6520456f96dc1144c20b158d15
[INFO] running `Command { std: "docker" "start" "-a" "ff005655309f63fd70ce1a46e095616adc870d6520456f96dc1144c20b158d15", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling libm v0.2.7
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.48
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking fdeflate v0.3.0
[INFO] [stderr]     Checking flate2 v1.0.27
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]     Checking png v0.17.10
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking cblas-sys v0.1.4
[INFO] [stderr]     Checking lapack-sys v0.14.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling syn v2.0.31
[INFO] [stderr]     Checking rand_chacha v0.3.1
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[INFO] [stderr]     Checking approx v0.4.0
[INFO] [stderr]     Checking noisy_float v0.2.0
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.48
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking cauchy v0.4.0
[INFO] [stderr]    Compiling katexit v0.1.4
[INFO] [stderr]     Checking lax v0.16.0
[INFO] [stderr]     Checking ndarray-stats v0.5.1
[INFO] [stderr]     Checking ndarray-linalg v0.16.0
[INFO] [stderr]     Checking ndarray-rand v0.14.0
[INFO] [stderr]     Checking ndarray-vision v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]  --> src/core/colour_models.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::From;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PixelBound` is imported redundantly
[INFO] [stdout]  --> src/format/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::core::traits::PixelBound;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use crate::core::*;
[INFO] [stdout]   |     -------------- the item `PixelBound` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sized` is imported redundantly
[INFO] [stdout]  --> src/processing/conv.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::marker::Sized;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Sized` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sized` is imported redundantly
[INFO] [stdout]  --> src/processing/sobel.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::marker::Sized;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Sized` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]  --> src/core/colour_models.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::From;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arr1` is imported redundantly
[INFO] [stdout]    --> src/core/image.rs:216:9
[INFO] [stdout]     |
[INFO] [stdout] 215 |     use super::*;
[INFO] [stdout]     |         -------- the item `arr1` is already imported here
[INFO] [stdout] 216 |     use ndarray::arr1;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Gray` is imported redundantly
[INFO] [stdout]   --> src/enhancement/histogram_equalisation.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     use super::*;
[INFO] [stdout]    |         -------- the item `Gray` is already imported here
[INFO] [stdout] 99 |     use crate::core::Gray;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PixelBound` is imported redundantly
[INFO] [stdout]  --> src/format/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::core::traits::PixelBound;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use crate::core::*;
[INFO] [stdout]   |     -------------- the item `PixelBound` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arr2` is imported redundantly
[INFO] [stdout]    --> src/morphology/mod.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 125 |     use super::*;
[INFO] [stdout]     |         -------- the item `arr2` is already imported here
[INFO] [stdout] 126 |     use ndarray::arr2;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sized` is imported redundantly
[INFO] [stdout]  --> src/processing/conv.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::marker::Sized;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Sized` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sized` is imported redundantly
[INFO] [stdout]  --> src/processing/sobel.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::marker::Sized;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Sized` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `affine` is imported redundantly
[INFO] [stdout]    --> src/transform/mod.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |     use super::affine;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 147 |     use super::*;
[INFO] [stdout]     |         -------- the item `affine` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rect` is never constructed
[INFO] [stdout]   --> src/transform/mod.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Rect {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> examples/basic.rs:11:25
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let cameraman = root.clone().join("images/cameraman.ppm");
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 11 -     let cameraman = root.clone().join("images/cameraman.ppm");
[INFO] [stdout] 11 +     let cameraman = root.join("images/cameraman.ppm");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rect` is never constructed
[INFO] [stdout]   --> src/transform/mod.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Rect {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.92s
[INFO] running `Command { std: "docker" "inspect" "ff005655309f63fd70ce1a46e095616adc870d6520456f96dc1144c20b158d15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff005655309f63fd70ce1a46e095616adc870d6520456f96dc1144c20b158d15", kill_on_drop: false }`
[INFO] [stdout] ff005655309f63fd70ce1a46e095616adc870d6520456f96dc1144c20b158d15