[INFO] fetching crate boomer 0.0.1...
[INFO] checking boomer-0.0.1 against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] extracting crate boomer 0.0.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate boomer 0.0.1 on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate boomer 0.0.1
[INFO] finished tweaking crates.io crate boomer 0.0.1
[INFO] tweaked toml for crates.io crate boomer 0.0.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate boomer 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3eb6e6e1eca0d204210f8d665e6d0a1a0bcf3ee68f92663226a3ef94f5c8f09c
[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" "3eb6e6e1eca0d204210f8d665e6d0a1a0bcf3ee68f92663226a3ef94f5c8f09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3eb6e6e1eca0d204210f8d665e6d0a1a0bcf3ee68f92663226a3ef94f5c8f09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3eb6e6e1eca0d204210f8d665e6d0a1a0bcf3ee68f92663226a3ef94f5c8f09c", kill_on_drop: false }`
[INFO] [stdout] 3eb6e6e1eca0d204210f8d665e6d0a1a0bcf3ee68f92663226a3ef94f5c8f09c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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] f14497a1e816118d2b10c8887ad838bd95b0c04106632aa41160b886f78cf2ef
[INFO] running `Command { std: "docker" "start" "-a" "f14497a1e816118d2b10c8887ad838bd95b0c04106632aa41160b886f78cf2ef", kill_on_drop: false }`
[INFO] [stderr]     Checking boomer v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "f14497a1e816118d2b10c8887ad838bd95b0c04106632aa41160b886f78cf2ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f14497a1e816118d2b10c8887ad838bd95b0c04106632aa41160b886f78cf2ef", kill_on_drop: false }`
[INFO] [stdout] f14497a1e816118d2b10c8887ad838bd95b0c04106632aa41160b886f78cf2ef