[INFO] updating cached repository https://github.com/jadencarver/superconductor
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9a85df318735ed7c54e58df18b29872107febacd
[INFO] testing jadencarver/superconductor against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjadencarver%2Fsuperconductor" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jadencarver/superconductor 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 git repo https://github.com/jadencarver/superconductor
[INFO] finished tweaking git repo https://github.com/jadencarver/superconductor
[INFO] tweaked toml for git repo https://github.com/jadencarver/superconductor written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/jadencarver/superconductor already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/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] 2f582fb1cb1374de9041e73da158e3aa6baee7983f00c7e1138dacb8c28fd0e8
[INFO] running `"docker" "start" "-a" "2f582fb1cb1374de9041e73da158e3aa6baee7983f00c7e1138dacb8c28fd0e8"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling if_chain v0.1.2
[INFO] [stderr]    Compiling maud v0.16.2 (https://github.com/lfairy/maud.git#04eb61e8)
[INFO] [stderr]    Compiling openssl-sys-extras v0.7.14
[INFO] [stderr]    Compiling openssl v0.7.14
[INFO] [stderr]    Compiling libz-sys v1.0.13
[INFO] [stderr]    Compiling cmake v0.1.21
[INFO] [stderr]    Compiling fsevent-sys v0.1.6
[INFO] [stderr]    Compiling termion v1.3.0
[INFO] [stderr]    Compiling base64 v0.4.1
[INFO] [stderr]    Compiling serde_xml v0.9.1
[INFO] [stderr]    Compiling serde_codegen v0.8.23
[INFO] [stderr]    Compiling chrono v0.3.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/maud-588f745ae3a2d730/04eb61e/maud/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(specialization)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error[E0455]: native frameworks are only available on macOS targets
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fsevent-sys-0.1.6/fsevent.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | #[link(name = "CoreServices", kind = "framework")]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0455]: native frameworks are only available on macOS targets
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fsevent-sys-0.1.6/core_foundation.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | #[link(name = "CoreServices", kind = "framework")]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `maud`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0455`.
[INFO] [stderr] error: Could not compile `fsevent-sys`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2f582fb1cb1374de9041e73da158e3aa6baee7983f00c7e1138dacb8c28fd0e8"`
[INFO] running `"docker" "rm" "-f" "2f582fb1cb1374de9041e73da158e3aa6baee7983f00c7e1138dacb8c28fd0e8"`
[INFO] [stdout] 2f582fb1cb1374de9041e73da158e3aa6baee7983f00c7e1138dacb8c28fd0e8