[INFO] fetching crate quantum 0.1.2...
[INFO] checking quantum-0.1.2 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate quantum 0.1.2 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate quantum 0.1.2 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quantum 0.1.2
[INFO] finished tweaking crates.io crate quantum 0.1.2
[INFO] tweaked toml for crates.io crate quantum 0.1.2 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d6035f6e67d50954a714eff573cd11a04142bfbd222c83735a09ec02f0cc3646
[INFO] running `Command { std: "docker" "start" "-a" "d6035f6e67d50954a714eff573cd11a04142bfbd222c83735a09ec02f0cc3646", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d6035f6e67d50954a714eff573cd11a04142bfbd222c83735a09ec02f0cc3646", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6035f6e67d50954a714eff573cd11a04142bfbd222c83735a09ec02f0cc3646", kill_on_drop: false }`
[INFO] [stdout] d6035f6e67d50954a714eff573cd11a04142bfbd222c83735a09ec02f0cc3646
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c5daf8d8b984110626ed24fd145f63b6d148ba2f56a877722e56e959333ac1b
[INFO] running `Command { std: "docker" "start" "-a" "9c5daf8d8b984110626ed24fd145f63b6d148ba2f56a877722e56e959333ac1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking float-cmp v0.2.5
[INFO] [stderr]     Checking quantum v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/matrix.rs:193:8
[INFO] [stdout]     |
[INFO] [stdout] 193 |    let mut m = m_real![1, 2; 3, 4];
[INFO] [stdout]     |        ----^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/matrix.rs:203:9
[INFO] [stdout]     |
[INFO] [stdout] 203 |     let mut added = m_real![2, 4; 6, 8];
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/matrix.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut squared = m_real![7, 10; 15, 22];
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.61s
[INFO] running `Command { std: "docker" "inspect" "9c5daf8d8b984110626ed24fd145f63b6d148ba2f56a877722e56e959333ac1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c5daf8d8b984110626ed24fd145f63b6d148ba2f56a877722e56e959333ac1b", kill_on_drop: false }`
[INFO] [stdout] 9c5daf8d8b984110626ed24fd145f63b6d148ba2f56a877722e56e959333ac1b