[INFO] fetching crate u_u 0.0.0...
[INFO] checking u_u-0.0.0 against master#f82664191d0e8764b7435b9d72eb0e366b8b1464 for pr-83354
[INFO] extracting crate u_u 0.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate u_u 0.0.0 on toolchain f82664191d0e8764b7435b9d72eb0e366b8b1464
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate u_u 0.0.0
[INFO] finished tweaking crates.io crate u_u 0.0.0
[INFO] tweaked toml for crates.io crate u_u 0.0.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate u_u 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8711e2fe0438d168756085bf802a05eab2f223c215ca6b655f9a879d1a1d8476
[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" "8711e2fe0438d168756085bf802a05eab2f223c215ca6b655f9a879d1a1d8476", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8711e2fe0438d168756085bf802a05eab2f223c215ca6b655f9a879d1a1d8476", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8711e2fe0438d168756085bf802a05eab2f223c215ca6b655f9a879d1a1d8476", kill_on_drop: false }`
[INFO] [stdout] 8711e2fe0438d168756085bf802a05eab2f223c215ca6b655f9a879d1a1d8476
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "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] 004e03fe0c78f406da3abd12ab379ea199ecd73b2afb5c6e87cc804118b6692a
[INFO] running `Command { std: "docker" "start" "-a" "004e03fe0c78f406da3abd12ab379ea199ecd73b2afb5c6e87cc804118b6692a", kill_on_drop: false }`
[INFO] [stderr]     Checking u_u v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "004e03fe0c78f406da3abd12ab379ea199ecd73b2afb5c6e87cc804118b6692a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "004e03fe0c78f406da3abd12ab379ea199ecd73b2afb5c6e87cc804118b6692a", kill_on_drop: false }`
[INFO] [stdout] 004e03fe0c78f406da3abd12ab379ea199ecd73b2afb5c6e87cc804118b6692a