[INFO] fetching crate SomeWithImage 0.1.8...
[INFO] checking SomeWithImage-0.1.8 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate SomeWithImage 0.1.8 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate SomeWithImage 0.1.8 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate SomeWithImage 0.1.8
[INFO] finished tweaking crates.io crate SomeWithImage 0.1.8
[INFO] tweaked toml for crates.io crate SomeWithImage 0.1.8 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding image v0.24.9 (latest: v0.25.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded color_quant v1.1.0
[INFO] [stderr]   Downloaded simd-adler32 v0.3.7
[INFO] [stderr]   Downloaded bit_field v0.10.2
[INFO] [stderr]   Downloaded spin v0.9.8
[INFO] [stderr]   Downloaded lebe v0.5.2
[INFO] [stderr]   Downloaded fdeflate v0.3.4
[INFO] [stderr]   Downloaded flume v0.11.0
[INFO] [stderr]   Downloaded qoi v0.4.1
[INFO] [stderr]   Downloaded exr v1.72.0
[INFO] [stderr]   Downloaded jpeg-decoder v0.3.1
[INFO] [stderr]   Downloaded png v0.17.13
[INFO] [stderr]   Downloaded flate2 v1.0.30
[INFO] [stderr]   Downloaded weezl v0.1.8
[INFO] [stderr]   Downloaded tiff v0.9.1
[INFO] [stderr]   Downloaded zune-inflate v0.2.54
[INFO] [stderr]   Downloaded gif v0.13.1
[INFO] [stderr]   Downloaded crc32fast v1.4.0
[INFO] [stderr]   Downloaded miniz_oxide v0.7.2
[INFO] [stderr]   Downloaded image v0.24.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb3135b5d93c59b7ca9da1e1967758ca1943a3b8491c3b903a4a1c14b01e430e
[INFO] running `Command { std: "docker" "start" "-a" "eb3135b5d93c59b7ca9da1e1967758ca1943a3b8491c3b903a4a1c14b01e430e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb3135b5d93c59b7ca9da1e1967758ca1943a3b8491c3b903a4a1c14b01e430e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb3135b5d93c59b7ca9da1e1967758ca1943a3b8491c3b903a4a1c14b01e430e", kill_on_drop: false }`
[INFO] [stdout] eb3135b5d93c59b7ca9da1e1967758ca1943a3b8491c3b903a4a1c14b01e430e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eac28ec7404bfa9804810dfcd0c049b91ecfa83d3a0c8cca0f4e57f03c6e41e8
[INFO] running `Command { std: "docker" "start" "-a" "eac28ec7404bfa9804810dfcd0c049b91ecfa83d3a0c8cca0f4e57f03c6e41e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking either v1.11.0
[INFO] [stderr]     Checking weezl v0.1.8
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking lebe v0.5.2
[INFO] [stderr]     Checking bytemuck v1.15.0
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking half v2.4.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking gif v0.13.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking flate2 v1.0.30
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking png v0.17.13
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking exr v1.72.0
[INFO] [stderr]     Checking jpeg-decoder v0.3.1
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking SomeWithImage v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Filter_matrix` should have an upper camel case name
[INFO] [stdout]  --> src/multiply_by_matrix/Filter.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Filter_matrix {
[INFO] [stdout]   |            ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FilterMatrix`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Filter_matrix` should have an upper camel case name
[INFO] [stdout]  --> src/multiply_by_matrix/Filter.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Filter_matrix {
[INFO] [stdout]   |            ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FilterMatrix`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/multiply_by_matrix.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for i in 0..repeat {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/multiply_by_matrix.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for i in 0..repeat {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `SomeWithImage` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `some_with_image`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Filter` should have a snake case name
[INFO] [stdout]  --> src/multiply_by_matrix.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod Filter;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case (notice the capitalization): `filter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Filter` should have a snake case name
[INFO] [stdout]  --> src/multiply_by_matrix.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod Filter;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case (notice the capitalization): `filter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.25s
[INFO] running `Command { std: "docker" "inspect" "eac28ec7404bfa9804810dfcd0c049b91ecfa83d3a0c8cca0f4e57f03c6e41e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eac28ec7404bfa9804810dfcd0c049b91ecfa83d3a0c8cca0f4e57f03c6e41e8", kill_on_drop: false }`
[INFO] [stdout] eac28ec7404bfa9804810dfcd0c049b91ecfa83d3a0c8cca0f4e57f03c6e41e8
[INFO] checking SomeWithImage-0.1.8 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate SomeWithImage 0.1.8 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate SomeWithImage 0.1.8 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate SomeWithImage 0.1.8
[INFO] finished tweaking crates.io crate SomeWithImage 0.1.8
[INFO] tweaked toml for crates.io crate SomeWithImage 0.1.8 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding image v0.24.9 (latest: v0.25.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0b3f82c182711a316a73aae7cb53aab5bc03d0364daa11255ae948af069226e9
[INFO] running `Command { std: "docker" "start" "-a" "0b3f82c182711a316a73aae7cb53aab5bc03d0364daa11255ae948af069226e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b3f82c182711a316a73aae7cb53aab5bc03d0364daa11255ae948af069226e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b3f82c182711a316a73aae7cb53aab5bc03d0364daa11255ae948af069226e9", kill_on_drop: false }`
[INFO] [stdout] 0b3f82c182711a316a73aae7cb53aab5bc03d0364daa11255ae948af069226e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a57d75a5bd0517ca0176df00dc8a62a3c371e61242a88b4829579a74e1895b0
[INFO] running `Command { std: "docker" "start" "-a" "6a57d75a5bd0517ca0176df00dc8a62a3c371e61242a88b4829579a74e1895b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking either v1.11.0
[INFO] [stderr]     Checking weezl v0.1.8
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking bytemuck v1.15.0
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking lebe v0.5.2
[INFO] [stderr]     Checking half v2.4.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]     Checking gif v0.13.1
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking flate2 v1.0.30
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking png v0.17.13
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking exr v1.72.0
[INFO] [stderr]     Checking jpeg-decoder v0.3.1
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking SomeWithImage v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Filter_matrix` should have an upper camel case name
[INFO] [stdout]  --> src/multiply_by_matrix/Filter.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Filter_matrix {
[INFO] [stdout]   |            ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FilterMatrix`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Filter_matrix` should have an upper camel case name
[INFO] [stdout]  --> src/multiply_by_matrix/Filter.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Filter_matrix {
[INFO] [stdout]   |            ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FilterMatrix`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/multiply_by_matrix.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for i in 0..repeat {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `SomeWithImage` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `some_with_image`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Filter` should have a snake case name
[INFO] [stdout]  --> src/multiply_by_matrix.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod Filter;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case (notice the capitalization): `filter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/multiply_by_matrix.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for i in 0..repeat {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Filter` should have a snake case name
[INFO] [stdout]  --> src/multiply_by_matrix.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod Filter;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case (notice the capitalization): `filter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.26s
[INFO] running `Command { std: "docker" "inspect" "6a57d75a5bd0517ca0176df00dc8a62a3c371e61242a88b4829579a74e1895b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a57d75a5bd0517ca0176df00dc8a62a3c371e61242a88b4829579a74e1895b0", kill_on_drop: false }`
[INFO] [stdout] 6a57d75a5bd0517ca0176df00dc8a62a3c371e61242a88b4829579a74e1895b0
