[INFO] fetching crate slack-hook2 0.10.0...
[INFO] checking slack-hook2-0.10.0 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate slack-hook2 0.10.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate slack-hook2 0.10.0 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slack-hook2 0.10.0
[INFO] finished tweaking crates.io crate slack-hook2 0.10.0
[INFO] tweaked toml for crates.io crate slack-hook2 0.10.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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] e878afa0bc7860299d00cd986baddaed62d82c212a0cfb5f55a8a08f829847b8
[INFO] running `Command { std: "docker" "start" "-a" "e878afa0bc7860299d00cd986baddaed62d82c212a0cfb5f55a8a08f829847b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e878afa0bc7860299d00cd986baddaed62d82c212a0cfb5f55a8a08f829847b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e878afa0bc7860299d00cd986baddaed62d82c212a0cfb5f55a8a08f829847b8", kill_on_drop: false }`
[INFO] [stdout] e878afa0bc7860299d00cd986baddaed62d82c212a0cfb5f55a8a08f829847b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db2ba62a8ea68f832f60675bb57d27a72d755d65748a3dd40fe8398665e58cae
[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" "db2ba62a8ea68f832f60675bb57d27a72d755d65748a3dd40fe8398665e58cae", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking tracing-core v0.1.16
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking hyper v0.13.8
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.8
[INFO] [stderr]     Checking slack-hook2 v0.10.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `Command { std: "docker" "inspect" "db2ba62a8ea68f832f60675bb57d27a72d755d65748a3dd40fe8398665e58cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db2ba62a8ea68f832f60675bb57d27a72d755d65748a3dd40fe8398665e58cae", kill_on_drop: false }`
[INFO] [stdout] db2ba62a8ea68f832f60675bb57d27a72d755d65748a3dd40fe8398665e58cae