[INFO] fetching crate polar-core 0.7.1...
[INFO] checking polar-core-0.7.1 against beta for pr-78714
[INFO] extracting crate polar-core 0.7.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate polar-core 0.7.1 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 polar-core 0.7.1
[INFO] finished tweaking crates.io crate polar-core 0.7.1
[INFO] tweaked toml for crates.io crate polar-core 0.7.1 written to /workspace/builds/worker-2/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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] f5bb7fad37f7124e84029ea0030c3ffce31bb7f45a7319f2568fc9c41f584865
[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" "f5bb7fad37f7124e84029ea0030c3ffce31bb7f45a7319f2568fc9c41f584865", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5bb7fad37f7124e84029ea0030c3ffce31bb7f45a7319f2568fc9c41f584865", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5bb7fad37f7124e84029ea0030c3ffce31bb7f45a7319f2568fc9c41f584865", kill_on_drop: false }`
[INFO] [stdout] f5bb7fad37f7124e84029ea0030c3ffce31bb7f45a7319f2568fc9c41f584865
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 8226b84d4a8071d06a83b03d467be315e0b378b0d28da819d054fe8ac82ec725
[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" "8226b84d4a8071d06a83b03d467be315e0b378b0d28da819d054fe8ac82ec725", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]     Checking permute v0.1.0
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking lalrpop-util v0.19.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.68
[INFO] [stderr]     Checking pipe v0.3.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling indoc v1.0.3
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.68
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.68
[INFO] [stderr]     Checking wasm-bindgen v0.2.68
[INFO] [stderr]     Checking js-sys v0.3.45
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]    Compiling string_cache v0.8.0
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking csv v1.1.4
[INFO] [stderr]    Compiling lalrpop v0.19.1
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]    Compiling polar-core v0.7.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 05s
[INFO] running `Command { std: "docker" "inspect" "8226b84d4a8071d06a83b03d467be315e0b378b0d28da819d054fe8ac82ec725", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8226b84d4a8071d06a83b03d467be315e0b378b0d28da819d054fe8ac82ec725", kill_on_drop: false }`
[INFO] [stdout] 8226b84d4a8071d06a83b03d467be315e0b378b0d28da819d054fe8ac82ec725