[INFO] fetching crate async-signals 0.3.1...
[INFO] checking async-signals-0.3.1 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate async-signals 0.3.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate async-signals 0.3.1 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-signals 0.3.1
[INFO] finished tweaking crates.io crate async-signals 0.3.1
[INFO] tweaked toml for crates.io crate async-signals 0.3.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7909cdbe577efe6d5e5074faaef1965a52407d9c043541c884049dde7b03a421
[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" "7909cdbe577efe6d5e5074faaef1965a52407d9c043541c884049dde7b03a421", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7909cdbe577efe6d5e5074faaef1965a52407d9c043541c884049dde7b03a421", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7909cdbe577efe6d5e5074faaef1965a52407d9c043541c884049dde7b03a421", kill_on_drop: false }`
[INFO] [stdout] 7909cdbe577efe6d5e5074faaef1965a52407d9c043541c884049dde7b03a421
[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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c98723553c4d6deb611e3f40107541be9c74eabe6d5200b3cd2ef73e8901e534
[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" "c98723553c4d6deb611e3f40107541be9c74eabe6d5200b3cd2ef73e8901e534", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core v0.3.6
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking futures-io v0.3.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.26
[INFO] [stderr]     Checking async-task v4.0.2
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking futures-task v0.3.6
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-channel v1.5.0
[INFO] [stderr]     Checking futures-lite v1.10.1
[INFO] [stderr]     Checking polling v2.0.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.1.9
[INFO] [stderr]     Checking async-executor v1.3.0
[INFO] [stderr]     Checking blocking v1.0.1
[INFO] [stderr]     Checking async-global-executor v1.3.0
[INFO] [stderr]    Compiling futures-macro v0.3.6
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]     Checking async-std v1.6.5
[INFO] [stderr]     Checking pin-project v0.4.26
[INFO] [stderr]     Checking futures-util v0.3.6
[INFO] [stderr]     Checking async-signals v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.78s
[INFO] running `Command { std: "docker" "inspect" "c98723553c4d6deb611e3f40107541be9c74eabe6d5200b3cd2ef73e8901e534", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c98723553c4d6deb611e3f40107541be9c74eabe6d5200b3cd2ef73e8901e534", kill_on_drop: false }`
[INFO] [stdout] c98723553c4d6deb611e3f40107541be9c74eabe6d5200b3cd2ef73e8901e534