[INFO] fetching crate rworkers 0.0.0...
[INFO] checking rworkers-0.0.0 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate rworkers 0.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rworkers 0.0.0 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rworkers 0.0.0
[INFO] finished tweaking crates.io crate rworkers 0.0.0
[INFO] tweaked toml for crates.io crate rworkers 0.0.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", 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] 501e5ad7663525a2a61bec6f4120e0407f235fd3cf2ea10edc27b368d373573f
[INFO] running `Command { std: "docker" "start" "-a" "501e5ad7663525a2a61bec6f4120e0407f235fd3cf2ea10edc27b368d373573f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "501e5ad7663525a2a61bec6f4120e0407f235fd3cf2ea10edc27b368d373573f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "501e5ad7663525a2a61bec6f4120e0407f235fd3cf2ea10edc27b368d373573f", kill_on_drop: false }`
[INFO] [stdout] 501e5ad7663525a2a61bec6f4120e0407f235fd3cf2ea10edc27b368d373573f
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] 100f950085f4d0ea1ae34a372bb12527fdade31936e10efea1127a918f02c707
[INFO] running `Command { std: "docker" "start" "-a" "100f950085f4d0ea1ae34a372bb12527fdade31936e10efea1127a918f02c707", kill_on_drop: false }`
[INFO] [stderr]     Checking rworkers v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "100f950085f4d0ea1ae34a372bb12527fdade31936e10efea1127a918f02c707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "100f950085f4d0ea1ae34a372bb12527fdade31936e10efea1127a918f02c707", kill_on_drop: false }`
[INFO] [stdout] 100f950085f4d0ea1ae34a372bb12527fdade31936e10efea1127a918f02c707