[INFO] fetching crate serra 0.1.0...
[INFO] checking serra-0.1.0 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate serra 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate serra 0.1.0 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serra 0.1.0
[INFO] finished tweaking crates.io crate serra 0.1.0
[INFO] tweaked toml for crates.io crate serra 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate serra 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33c7525e8be4b9049ae1c07a72a36f15c1f3adc3e98518115d215f94f2a44449
[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" "33c7525e8be4b9049ae1c07a72a36f15c1f3adc3e98518115d215f94f2a44449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33c7525e8be4b9049ae1c07a72a36f15c1f3adc3e98518115d215f94f2a44449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33c7525e8be4b9049ae1c07a72a36f15c1f3adc3e98518115d215f94f2a44449", kill_on_drop: false }`
[INFO] [stdout] 33c7525e8be4b9049ae1c07a72a36f15c1f3adc3e98518115d215f94f2a44449
[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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa45ea401e1c3f8c0e9400ef10b8aa77d3d7ad5e9d8e07642d5929ebf97d9fa2
[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" "fa45ea401e1c3f8c0e9400ef10b8aa77d3d7ad5e9d8e07642d5929ebf97d9fa2", kill_on_drop: false }`
[INFO] [stderr]     Checking serra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "fa45ea401e1c3f8c0e9400ef10b8aa77d3d7ad5e9d8e07642d5929ebf97d9fa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa45ea401e1c3f8c0e9400ef10b8aa77d3d7ad5e9d8e07642d5929ebf97d9fa2", kill_on_drop: false }`
[INFO] [stdout] fa45ea401e1c3f8c0e9400ef10b8aa77d3d7ad5e9d8e07642d5929ebf97d9fa2