[INFO] fetching crate gwd-backend-firefox 0.1.5...
[INFO] checking gwd-backend-firefox-0.1.5 against beta for pr-78714
[INFO] extracting crate gwd-backend-firefox 0.1.5 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate gwd-backend-firefox 0.1.5 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 gwd-backend-firefox 0.1.5
[INFO] finished tweaking crates.io crate gwd-backend-firefox 0.1.5
[INFO] tweaked toml for crates.io crate gwd-backend-firefox 0.1.5 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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/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] 1addbab4c1f8a7918a932d5677a4d1a212242f77319a0d0f65d2890f57b6612d
[INFO] running `Command { std: "docker" "start" "-a" "1addbab4c1f8a7918a932d5677a4d1a212242f77319a0d0f65d2890f57b6612d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1addbab4c1f8a7918a932d5677a4d1a212242f77319a0d0f65d2890f57b6612d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1addbab4c1f8a7918a932d5677a4d1a212242f77319a0d0f65d2890f57b6612d", kill_on_drop: false }`
[INFO] [stdout] 1addbab4c1f8a7918a932d5677a4d1a212242f77319a0d0f65d2890f57b6612d
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f04d7a5e65b8819439a89fead5cb47aa7facbea8fc80e7a07ca751aa9f59c9e5
[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" "f04d7a5e65b8819439a89fead5cb47aa7facbea8fc80e7a07ca751aa9f59c9e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling pin-project-lite v0.1.11
[INFO] [stderr]    Compiling futures-core v0.3.8
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling futures-sink v0.3.8
[INFO] [stderr]    Compiling futures-io v0.3.8
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling tower-service v0.3.0
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling ipnet v2.3.0
[INFO] [stderr]    Compiling zmq v0.9.2
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling http v0.2.1
[INFO] [stderr]    Compiling form_urlencoded v1.0.0
[INFO] [stderr]    Compiling zmq-sys v0.11.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.35
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling socket2 v0.3.16
[INFO] [stderr]    Compiling filetime v0.2.13
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling futures-channel v0.3.8
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling getter-derive-rs v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling tar v0.4.30
[INFO] [stderr]    Compiling pin-project v0.4.27
[INFO] [stderr]    Compiling pin-project v1.0.1
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling tracing v0.1.21
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking simplelog v0.7.6
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling futures-util v0.3.8
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling tracing-futures v0.2.4
[INFO] [stderr]    Compiling url v2.2.0
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]    Compiling tokio v0.2.22
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling native-tls v0.2.6
[INFO] [stderr]     Checking structopt v0.3.20
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling hyper v0.13.9
[INFO] [stderr]     Checking lz4 v1.23.2
[INFO] [stderr]    Compiling hyper-tls v0.4.3
[INFO] [stderr]    Compiling reqwest v0.10.8
[INFO] [stderr]    Compiling godwit-daemon v0.1.10
[INFO] [stderr]     Checking gwd-backend-firefox v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `dyn Registrar`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:66:35
[INFO] [stdout]    |
[INFO] [stdout] 66 | extern "C" fn register(registrar: &mut dyn Registrar) {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = note: trait objects have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `dyn Registrar`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:66:35
[INFO] [stdout]    |
[INFO] [stdout] 66 | extern "C" fn register(registrar: &mut dyn Registrar) {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = note: trait objects have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 38s
[INFO] running `Command { std: "docker" "inspect" "f04d7a5e65b8819439a89fead5cb47aa7facbea8fc80e7a07ca751aa9f59c9e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f04d7a5e65b8819439a89fead5cb47aa7facbea8fc80e7a07ca751aa9f59c9e5", kill_on_drop: false }`
[INFO] [stdout] f04d7a5e65b8819439a89fead5cb47aa7facbea8fc80e7a07ca751aa9f59c9e5