[INFO] fetching crate if_rust_version 1.0.0...
[INFO] checking if_rust_version-1.0.0 against beta for pr-78714
[INFO] extracting crate if_rust_version 1.0.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate if_rust_version 1.0.0 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 if_rust_version 1.0.0
[INFO] finished tweaking crates.io crate if_rust_version 1.0.0
[INFO] tweaked toml for crates.io crate if_rust_version 1.0.0 written to /workspace/builds/worker-7/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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] f23acaf64ec25d2a231fb8008dabf1e2d67fa1000c4e9b6fbf7ba93cbd5d31eb
[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" "f23acaf64ec25d2a231fb8008dabf1e2d67fa1000c4e9b6fbf7ba93cbd5d31eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f23acaf64ec25d2a231fb8008dabf1e2d67fa1000c4e9b6fbf7ba93cbd5d31eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f23acaf64ec25d2a231fb8008dabf1e2d67fa1000c4e9b6fbf7ba93cbd5d31eb", kill_on_drop: false }`
[INFO] [stdout] f23acaf64ec25d2a231fb8008dabf1e2d67fa1000c4e9b6fbf7ba93cbd5d31eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 533606c5517eee63ad3491be50c88db5dee718ef2a9054a3cfcb8bc30b4e97ea
[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" "533606c5517eee63ad3491be50c88db5dee718ef2a9054a3cfcb8bc30b4e97ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling if_rust_version v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "533606c5517eee63ad3491be50c88db5dee718ef2a9054a3cfcb8bc30b4e97ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "533606c5517eee63ad3491be50c88db5dee718ef2a9054a3cfcb8bc30b4e97ea", kill_on_drop: false }`
[INFO] [stdout] 533606c5517eee63ad3491be50c88db5dee718ef2a9054a3cfcb8bc30b4e97ea