[INFO] updating cached repository Moggers/amethyst_servo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Moggers/amethyst_servo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Moggers/amethyst_servo" "work/ex/beta-1.38-1/sources/1.37.0/gh/Moggers/amethyst_servo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Moggers/amethyst_servo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Moggers/amethyst_servo" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Moggers/amethyst_servo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Moggers/amethyst_servo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 82c3b28937004b24fc31558655e00fde7d6bb324
[INFO] sha for GitHub repo Moggers/amethyst_servo: 82c3b28937004b24fc31558655e00fde7d6bb324
[INFO] validating manifest of Moggers/amethyst_servo on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Moggers/amethyst_servo on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Moggers/amethyst_servo
[INFO] finished frobbing Moggers/amethyst_servo
[INFO] frobbed toml for Moggers/amethyst_servo written to work/ex/beta-1.38-1/sources/1.37.0/gh/Moggers/amethyst_servo/Cargo.toml
[INFO] started frobbing Moggers/amethyst_servo
[INFO] finished frobbing Moggers/amethyst_servo
[INFO] frobbed toml for Moggers/amethyst_servo written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Moggers/amethyst_servo/Cargo.toml
[INFO] crate Moggers/amethyst_servo already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Moggers/amethyst_servo against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Moggers/amethyst_servo:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 7fd925db55faa66edca22c156fd3bc7f59f2295d832bd57a291ea1384e3803b1
[INFO] running `"docker" "start" "-a" "7fd925db55faa66edca22c156fd3bc7f59f2295d832bd57a291ea1384e3803b1"`
[INFO] [stderr]    Compiling utf-8 v0.7.2
[INFO] [stderr]    Compiling mozjs_sys v0.50.1
[INFO] [stderr]    Compiling smallbitvec v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling signpost v0.1.0 (https://github.com/pcwalton/signpost.git#7ed71250)
[INFO] [stderr]    Compiling binary-space-partition v0.1.2
[INFO] [stderr]    Compiling webrender v0.57.0 (https://github.com/servo/webrender#00b85801)
[INFO] [stderr]    Compiling mint v0.5.0
[INFO] [stderr]    Compiling alloc-no-stdlib v1.2.0
[INFO] [stderr]    Compiling atomic_refcell v0.1.1
[INFO] [stderr]    Compiling thread_profiler v0.1.3
[INFO] [stderr]    Compiling bitreader v0.3.1
[INFO] [stderr]    Compiling mp3-metadata v0.3.0
[INFO] [stderr]    Compiling dom_struct v0.0.1 (https://github.com/servo/servo#e8fdc677)
[INFO] [stderr]    Compiling ref_slice v1.1.1
[INFO] [stderr] error[E0658]: procedural macros cannot be expanded to expressions
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/servo-12bfca331f128de3/e8fdc67/components/dom_struct/lib.rs:17:22
[INFO] [stderr]    |
[INFO] [stderr] 17 |       let attributes = quote! {
[INFO] [stderr]    |  ______________________^
[INFO] [stderr] 18 | |         #[derive(DenyPublicFields, DomObject, JSTraceable, MallocSizeOf)]
[INFO] [stderr] 19 | |         #[must_root]
[INFO] [stderr] 20 | |         #[repr(C)]
[INFO] [stderr] 21 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/servo-12bfca331f128de3/e8fdc67/components/dom_struct/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(proc_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_quote'
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/servo-12bfca331f128de3/e8fdc67/components/dom_struct/lib.rs:9:31
[INFO] [stderr]   |
[INFO] [stderr] 9 | use proc_macro::{TokenStream, quote};
[INFO] [stderr]   |                               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/54722
[INFO] [stderr] 
[INFO] [stderr]    Compiling swapper v0.1.0
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `dom_struct`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7fd925db55faa66edca22c156fd3bc7f59f2295d832bd57a291ea1384e3803b1"`
[INFO] running `"docker" "rm" "-f" "7fd925db55faa66edca22c156fd3bc7f59f2295d832bd57a291ea1384e3803b1"`
[INFO] [stdout] 7fd925db55faa66edca22c156fd3bc7f59f2295d832bd57a291ea1384e3803b1