[INFO] fetching crate matrix_algebra 0.1.0...
[INFO] checking matrix_algebra-0.1.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate matrix_algebra 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate matrix_algebra 0.1.0
[INFO] finished tweaking crates.io crate matrix_algebra 0.1.0
[INFO] tweaked toml for crates.io crate matrix_algebra 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate matrix_algebra 0.1.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate matrix_algebra 0.1.0 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45426ee2f93c8f313e9932aa12bbee64886f75f6c44e45858c3d0d899054747b
[INFO] running `Command { std: "docker" "start" "-a" "45426ee2f93c8f313e9932aa12bbee64886f75f6c44e45858c3d0d899054747b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45426ee2f93c8f313e9932aa12bbee64886f75f6c44e45858c3d0d899054747b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45426ee2f93c8f313e9932aa12bbee64886f75f6c44e45858c3d0d899054747b", kill_on_drop: false }`
[INFO] [stdout] 45426ee2f93c8f313e9932aa12bbee64886f75f6c44e45858c3d0d899054747b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48395f3333b8c21993335a869795e56222d7f28ed50824492e834c314c97b935
[INFO] running `Command { std: "docker" "start" "-a" "48395f3333b8c21993335a869795e56222d7f28ed50824492e834c314c97b935", kill_on_drop: false }`
[INFO] [stderr]     Checking matrix_algebra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]   --> src/matrix/matrix_neg.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 34 |     assert_eq!(--&m1, Matrix::create_from_data(vec![1, 0, 0, 1], 2, 2));
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]    = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]    = note: `#[warn(double_negations)]` on by default
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]    |
[INFO] [stdout] 34 |     assert_eq!(-(-&m1), Matrix::create_from_data(vec![1, 0, 0, 1], 2, 2));
[INFO] [stdout]    |                 +    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]   --> src/matrix/matrix_neg.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 34 |     assert_eq!(--&m1, Matrix::create_from_data(vec![1, 0, 0, 1], 2, 2));
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]    = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]    = note: `#[warn(double_negations)]` on by default
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]    |
[INFO] [stdout] 34 |     assert_eq!(-(-&m1), Matrix::create_from_data(vec![1, 0, 0, 1], 2, 2));
[INFO] [stdout]    |                 +    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "48395f3333b8c21993335a869795e56222d7f28ed50824492e834c314c97b935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48395f3333b8c21993335a869795e56222d7f28ed50824492e834c314c97b935", kill_on_drop: false }`
[INFO] [stdout] 48395f3333b8c21993335a869795e56222d7f28ed50824492e834c314c97b935