[INFO] fetching crate mailgun_v3 0.9.0...
[INFO] checking mailgun_v3-0.9.0 against beta for pr-78714
[INFO] extracting crate mailgun_v3 0.9.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mailgun_v3 0.9.0 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 mailgun_v3 0.9.0
[INFO] finished tweaking crates.io crate mailgun_v3 0.9.0
[INFO] tweaked toml for crates.io crate mailgun_v3 0.9.0 written to /workspace/builds/worker-4/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-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] db5de0aebe6cf40bfa2971f8b8e5c133c6e1c91ff9e8f17256e460a947c9ab73
[INFO] running `Command { std: "docker" "start" "-a" "db5de0aebe6cf40bfa2971f8b8e5c133c6e1c91ff9e8f17256e460a947c9ab73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db5de0aebe6cf40bfa2971f8b8e5c133c6e1c91ff9e8f17256e460a947c9ab73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db5de0aebe6cf40bfa2971f8b8e5c133c6e1c91ff9e8f17256e460a947c9ab73", kill_on_drop: false }`
[INFO] [stdout] db5de0aebe6cf40bfa2971f8b8e5c133c6e1c91ff9e8f17256e460a947c9ab73
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f04fd4e8d10fea00a18f29e68bba4ef1834602362ddd594b89929e0a25e57ca5
[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" "f04fd4e8d10fea00a18f29e68bba4ef1834602362ddd594b89929e0a25e57ca5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling extend v0.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking assert-json-diff v1.1.0
[INFO] [stderr]     Checking tokio v0.2.23
[INFO] [stderr]     Checking mockito v0.23.3
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking pin-project v1.0.1
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.8
[INFO] [stderr]     Checking mailgun_v3 v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "f04fd4e8d10fea00a18f29e68bba4ef1834602362ddd594b89929e0a25e57ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f04fd4e8d10fea00a18f29e68bba4ef1834602362ddd594b89929e0a25e57ca5", kill_on_drop: false }`
[INFO] [stdout] f04fd4e8d10fea00a18f29e68bba4ef1834602362ddd594b89929e0a25e57ca5