[INFO] fetching crate math_traits 0.2.1...
[INFO] checking math_traits-0.2.1 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate math_traits 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate math_traits 0.2.1 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate math_traits 0.2.1
[INFO] finished tweaking crates.io crate math_traits 0.2.1
[INFO] tweaked toml for crates.io crate math_traits 0.2.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 316f663e8b3d83c106beec2b9e5fb999f6afbe6841b4848f7befeb0fd2f86a7f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "316f663e8b3d83c106beec2b9e5fb999f6afbe6841b4848f7befeb0fd2f86a7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "316f663e8b3d83c106beec2b9e5fb999f6afbe6841b4848f7befeb0fd2f86a7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "316f663e8b3d83c106beec2b9e5fb999f6afbe6841b4848f7befeb0fd2f86a7f", kill_on_drop: false }`
[INFO] [stdout] 316f663e8b3d83c106beec2b9e5fb999f6afbe6841b4848f7befeb0fd2f86a7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c6aab8f1c29fe9752a11427a1ff4e50e14fece01de31bf9eeb13c35552b7f9ae
[INFO] running `Command { std: "docker" "start" "-a" "c6aab8f1c29fe9752a11427a1ff4e50e14fece01de31bf9eeb13c35552b7f9ae", kill_on_drop: false }`
[INFO] [stderr]     Checking tuple v0.4.2
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking math_traits v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `fmaf32`, `fmaf64`
[INFO] [stdout]  --> src/real.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::intrinsics::{fmaf32, fmaf64};
[INFO] [stdout]   |                       ^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fmaf32`, `fmaf64`
[INFO] [stdout]  --> src/real.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::intrinsics::{fmaf32, fmaf64};
[INFO] [stdout]   |                       ^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.15s
[INFO] running `Command { std: "docker" "inspect" "c6aab8f1c29fe9752a11427a1ff4e50e14fece01de31bf9eeb13c35552b7f9ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6aab8f1c29fe9752a11427a1ff4e50e14fece01de31bf9eeb13c35552b7f9ae", kill_on_drop: false }`
[INFO] [stdout] c6aab8f1c29fe9752a11427a1ff4e50e14fece01de31bf9eeb13c35552b7f9ae