[INFO] crate metal-sys 0.0.0 is already in cache
[INFO] testing metal-sys-0.0.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate metal-sys 0.0.0 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate metal-sys 0.0.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate metal-sys 0.0.0
[INFO] finished tweaking crates.io crate metal-sys 0.0.0
[INFO] tweaked toml for crates.io crate metal-sys 0.0.0 written to work/builds/worker-6/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 493476a2106de949031a15552dbfe765c527609c62324d295689103c08200578
[INFO] running `"docker" "start" "-a" "493476a2106de949031a15552dbfe765c527609c62324d295689103c08200578"`
[INFO] [stderr]    Compiling metal-sys v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/protocols/mtl_resource.rs:143:1
[INFO] [stderr]     |
[INFO] [stderr] 143 | / /// Optional arguments used to create and influence behavior of buffer and
[INFO] [stderr] 144 | | /// texture objects.
[INFO] [stderr]     | |____________________^
[INFO] [stderr] 145 | / bitflags! {
[INFO] [stderr] 146 | |     pub flags MTLResourceOptions: usize {
[INFO] [stderr] 147 | |         /// The default CPU cache mode for the resource. Guarantees that read and
[INFO] [stderr] 148 | |         /// write operations are executed in the expected order.
[INFO] [stderr] ...   |
[INFO] [stderr] 183 | |     }
[INFO] [stderr] 184 | | }
[INFO] [stderr]     | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `block`
[INFO] [stderr]  --> src/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | extern crate block;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `metal-sys`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "493476a2106de949031a15552dbfe765c527609c62324d295689103c08200578"`
[INFO] running `"docker" "rm" "-f" "493476a2106de949031a15552dbfe765c527609c62324d295689103c08200578"`
[INFO] [stdout] 493476a2106de949031a15552dbfe765c527609c62324d295689103c08200578