[INFO] fetching crate objrs_frameworks_metal_kit 0.0.2...
[INFO] testing objrs_frameworks_metal_kit-0.0.2 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate objrs_frameworks_metal_kit 0.0.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate objrs_frameworks_metal_kit 0.0.2 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate objrs_frameworks_metal_kit 0.0.2
[INFO] finished tweaking crates.io crate objrs_frameworks_metal_kit 0.0.2
[INFO] tweaked toml for crates.io crate objrs_frameworks_metal_kit 0.0.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded objrs_frameworks_app_kit v0.0.2
[INFO] [stderr]   Downloaded objrs_macros v0.0.2
[INFO] [stderr]   Downloaded objrs_frameworks_metal v0.0.2
[INFO] [stderr]   Downloaded objrs_frameworks_core_graphics v0.0.2
[INFO] [stderr]   Downloaded objrs_frameworks_foundation_macros v0.0.2
[INFO] [stderr]   Downloaded objrs_frameworks_foundation v0.0.2
[INFO] [stderr]   Downloaded objrs_runtime v0.0.2
[INFO] [stderr]   Downloaded objrs v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10b5bbaa703ffd157b9ade25df3b50177d6319de750e60e2d47e097f3233282a
[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" "10b5bbaa703ffd157b9ade25df3b50177d6319de750e60e2d47e097f3233282a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10b5bbaa703ffd157b9ade25df3b50177d6319de750e60e2d47e097f3233282a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10b5bbaa703ffd157b9ade25df3b50177d6319de750e60e2d47e097f3233282a", kill_on_drop: false }`
[INFO] [stdout] 10b5bbaa703ffd157b9ade25df3b50177d6319de750e60e2d47e097f3233282a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80dd0062dfaa02c78ac73d9ac2f76498e52a6d8f6aeb881baac86a38dc8e6f7a
[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" "80dd0062dfaa02c78ac73d9ac2f76498e52a6d8f6aeb881baac86a38dc8e6f7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling objrs_runtime v0.0.2
[INFO] [stdout] error[E0740]: unions may not contain fields that need dropping
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/objrs_runtime-0.0.2/src/objc_exception.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     f: F,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: wrap the type with `std::mem::ManuallyDrop` and ensure it is manually dropped
[INFO] [stdout]    |
[INFO] [stdout] 96 |     f: std::mem::ManuallyDrop<F>,
[INFO] [stdout]    |        +++++++++++++++++++++++ +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0740`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `objrs_runtime` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "80dd0062dfaa02c78ac73d9ac2f76498e52a6d8f6aeb881baac86a38dc8e6f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80dd0062dfaa02c78ac73d9ac2f76498e52a6d8f6aeb881baac86a38dc8e6f7a", kill_on_drop: false }`
[INFO] [stdout] 80dd0062dfaa02c78ac73d9ac2f76498e52a6d8f6aeb881baac86a38dc8e6f7a