[INFO] fetching crate text_io 0.1.8...
[INFO] checking text_io-0.1.8 against beta for pr-78714
[INFO] extracting crate text_io 0.1.8 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate text_io 0.1.8 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 text_io 0.1.8
[INFO] finished tweaking crates.io crate text_io 0.1.8
[INFO] tweaked toml for crates.io crate text_io 0.1.8 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate text_io 0.1.8 already has a lockfile, it will not be regenerated
[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] d73706a814ebfb5236b1f2fa57f4a7816ea4f2619fa0f46c78e80aaf981ce49f
[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" "d73706a814ebfb5236b1f2fa57f4a7816ea4f2619fa0f46c78e80aaf981ce49f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d73706a814ebfb5236b1f2fa57f4a7816ea4f2619fa0f46c78e80aaf981ce49f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d73706a814ebfb5236b1f2fa57f4a7816ea4f2619fa0f46c78e80aaf981ce49f", kill_on_drop: false }`
[INFO] [stdout] d73706a814ebfb5236b1f2fa57f4a7816ea4f2619fa0f46c78e80aaf981ce49f
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 75fb4213f5ccdf606bad9493dbb012715c9925618d9835ffaeb4f4660570aa8d
[INFO] running `Command { std: "docker" "start" "-a" "75fb4213f5ccdf606bad9493dbb012715c9925618d9835ffaeb4f4660570aa8d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking text_io v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "75fb4213f5ccdf606bad9493dbb012715c9925618d9835ffaeb4f4660570aa8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75fb4213f5ccdf606bad9493dbb012715c9925618d9835ffaeb4f4660570aa8d", kill_on_drop: false }`
[INFO] [stdout] 75fb4213f5ccdf606bad9493dbb012715c9925618d9835ffaeb4f4660570aa8d