[INFO] fetching crate math_utils 0.1.0...
[INFO] checking math_utils-0.1.0 against beta for pr-78714
[INFO] extracting crate math_utils 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate math_utils 0.1.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate math_utils 0.1.0
[INFO] finished tweaking crates.io crate math_utils 0.1.0
[INFO] tweaked toml for crates.io crate math_utils 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca8bc11e62e4f9ffa0dd4dbf3ab855b73521cfb7bbfc396f1f27a44288a9ea80
[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" "ca8bc11e62e4f9ffa0dd4dbf3ab855b73521cfb7bbfc396f1f27a44288a9ea80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca8bc11e62e4f9ffa0dd4dbf3ab855b73521cfb7bbfc396f1f27a44288a9ea80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca8bc11e62e4f9ffa0dd4dbf3ab855b73521cfb7bbfc396f1f27a44288a9ea80", kill_on_drop: false }`
[INFO] [stdout] ca8bc11e62e4f9ffa0dd4dbf3ab855b73521cfb7bbfc396f1f27a44288a9ea80
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de607f06f1d6a112f1a062d804ec18b84411ba2f432e1ff5b439066e6003a602
[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" "de607f06f1d6a112f1a062d804ec18b84411ba2f432e1ff5b439066e6003a602", kill_on_drop: false }`
[INFO] [stderr]     Checking math_utils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "de607f06f1d6a112f1a062d804ec18b84411ba2f432e1ff5b439066e6003a602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de607f06f1d6a112f1a062d804ec18b84411ba2f432e1ff5b439066e6003a602", kill_on_drop: false }`
[INFO] [stdout] de607f06f1d6a112f1a062d804ec18b84411ba2f432e1ff5b439066e6003a602