[INFO] fetching crate complex_algebra 0.1.8...
[INFO] checking complex_algebra-0.1.8 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate complex_algebra 0.1.8 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate complex_algebra 0.1.8
[INFO] finished tweaking crates.io crate complex_algebra 0.1.8
[INFO] tweaked toml for crates.io crate complex_algebra 0.1.8 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate complex_algebra 0.1.8 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 800bdaf518c9ac609bde0ea1b6b5f48407daf93dbcc1c97a6d2ee1242274079c
[INFO] running `Command { std: "docker" "start" "-a" "800bdaf518c9ac609bde0ea1b6b5f48407daf93dbcc1c97a6d2ee1242274079c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "800bdaf518c9ac609bde0ea1b6b5f48407daf93dbcc1c97a6d2ee1242274079c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "800bdaf518c9ac609bde0ea1b6b5f48407daf93dbcc1c97a6d2ee1242274079c", kill_on_drop: false }`
[INFO] [stdout] 800bdaf518c9ac609bde0ea1b6b5f48407daf93dbcc1c97a6d2ee1242274079c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78f14788233ee2343270f9c4e05b8da5796c5c5c5d11cca58143462c1a8396bc
[INFO] running `Command { std: "docker" "start" "-a" "78f14788233ee2343270f9c4e05b8da5796c5c5c5d11cca58143462c1a8396bc", kill_on_drop: false }`
[INFO] [stderr]     Checking complex_algebra v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]   --> src/complex/neg.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     assert_eq!(--z, c(1.0, 2.0));
[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] 30 |     assert_eq!(-(-z), c(1.0, 2.0));
[INFO] [stdout]    |                 +  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "78f14788233ee2343270f9c4e05b8da5796c5c5c5d11cca58143462c1a8396bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78f14788233ee2343270f9c4e05b8da5796c5c5c5d11cca58143462c1a8396bc", kill_on_drop: false }`
[INFO] [stdout] 78f14788233ee2343270f9c4e05b8da5796c5c5c5d11cca58143462c1a8396bc