[INFO] fetching crate iron-oxide 0.1.1...
[INFO] checking iron-oxide-0.1.1 against beta for pr-78714
[INFO] extracting crate iron-oxide 0.1.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate iron-oxide 0.1.1 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 iron-oxide 0.1.1
[INFO] finished tweaking crates.io crate iron-oxide 0.1.1
[INFO] tweaked toml for crates.io crate iron-oxide 0.1.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate iron-oxide 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stdout] 8153f806141278bbc1fa043deba42bfbe99ba17cead453d3c5dadffb430314c9
[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" "8153f806141278bbc1fa043deba42bfbe99ba17cead453d3c5dadffb430314c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8153f806141278bbc1fa043deba42bfbe99ba17cead453d3c5dadffb430314c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8153f806141278bbc1fa043deba42bfbe99ba17cead453d3c5dadffb430314c9", kill_on_drop: false }`
[INFO] [stdout] 8153f806141278bbc1fa043deba42bfbe99ba17cead453d3c5dadffb430314c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 7e535ffbcb36b4047afac0049639cc204ba0ca5c69a4eb581a353448d8dd03fd
[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" "7e535ffbcb36b4047afac0049639cc204ba0ca5c69a4eb581a353448d8dd03fd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]     Checking block v0.1.6
[INFO] [stderr]     Checking malloc_buf v0.0.6
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking objc v0.2.7
[INFO] [stderr]     Checking colog v1.0.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking calloop v0.4.4
[INFO] [stderr]     Checking wayland-client v0.23.6
[INFO] [stderr]     Checking wayland-protocols v0.23.6
[INFO] [stderr]    Compiling enumflags2_derive v0.6.4
[INFO] [stderr]     Checking enumflags2 v0.6.4
[INFO] [stderr]     Checking iron-oxide v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/device.rs:59:38
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub unsafe fn MTLCopyAllDevices() -> Vec<MTLDevice> {
[INFO] [stdout]    |               -----------------      ^^^^^^^^^^^^^^ expected struct `Vec`, found `()`
[INFO] [stdout]    |               |
[INFO] [stdout]    |               implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Vec<device::MTLDevice>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant or associated item named `MacOS` found for enum `RawWindowHandle` in the current scope
[INFO] [stdout]   --> src/layer.rs:15:30
[INFO] [stdout]    |
[INFO] [stdout] 15 |             RawWindowHandle::MacOS(handle) => {
[INFO] [stdout]    |                              ^^^^^ variant or associated item not found in `RawWindowHandle`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `iron-oxide`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7e535ffbcb36b4047afac0049639cc204ba0ca5c69a4eb581a353448d8dd03fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e535ffbcb36b4047afac0049639cc204ba0ca5c69a4eb581a353448d8dd03fd", kill_on_drop: false }`
[INFO] [stdout] 7e535ffbcb36b4047afac0049639cc204ba0ca5c69a4eb581a353448d8dd03fd