[INFO] updating cached repository https://github.com/gretchenfrage/clusterzip
[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] 3950a835105c2ce215310f68c64029a79ec58278
[INFO] testing gretchenfrage/clusterzip against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgretchenfrage%2Fclusterzip" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gretchenfrage/clusterzip on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gretchenfrage/clusterzip
[INFO] finished tweaking git repo https://github.com/gretchenfrage/clusterzip
[INFO] tweaked toml for git repo https://github.com/gretchenfrage/clusterzip written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/gretchenfrage/clusterzip already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 3593cdd029b85e758f5beb900cfbc0a098016db2d6c901677004f54ac891f72a
[INFO] running `"docker" "start" "-a" "3593cdd029b85e758f5beb900cfbc0a098016db2d6c901677004f54ac891f72a"`
[INFO] [stderr]    Compiling futures v0.1.19
[INFO] [stderr]    Compiling volatile_cell v1.0.0
[INFO] [stderr]    Compiling monitor v0.1.0
[INFO] [stderr]    Compiling serde v1.0.35
[INFO] [stderr]    Compiling file v1.1.1
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling libz-sys v1.0.18
[INFO] [stderr]    Compiling openssl-sys v0.9.27
[INFO] [stderr]    Compiling cmake v0.1.29
[INFO] [stderr]    Compiling bytes v0.4.6
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling stopwatch v0.0.7
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/volatile_cell-1.0.0/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(core_intrinsics)]
[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: could not compile `volatile_cell`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3593cdd029b85e758f5beb900cfbc0a098016db2d6c901677004f54ac891f72a"`
[INFO] running `"docker" "rm" "-f" "3593cdd029b85e758f5beb900cfbc0a098016db2d6c901677004f54ac891f72a"`
[INFO] [stdout] 3593cdd029b85e758f5beb900cfbc0a098016db2d6c901677004f54ac891f72a