[INFO] updating cached repository rustmx/workshop-rocket-meetup008
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rustmx/workshop-rocket-meetup008
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rustmx/workshop-rocket-meetup008" "work/ex/beta-1.38-1/sources/1.37.0/gh/rustmx/workshop-rocket-meetup008"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rustmx/workshop-rocket-meetup008'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rustmx/workshop-rocket-meetup008" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustmx/workshop-rocket-meetup008"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustmx/workshop-rocket-meetup008'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b391d739d0ae23da22e9b786da4dd937b8459a78
[INFO] sha for GitHub repo rustmx/workshop-rocket-meetup008: b391d739d0ae23da22e9b786da4dd937b8459a78
[INFO] validating manifest of rustmx/workshop-rocket-meetup008 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 rustmx/workshop-rocket-meetup008 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 rustmx/workshop-rocket-meetup008
[INFO] finished frobbing rustmx/workshop-rocket-meetup008
[INFO] frobbed toml for rustmx/workshop-rocket-meetup008 written to work/ex/beta-1.38-1/sources/1.37.0/gh/rustmx/workshop-rocket-meetup008/Cargo.toml
[INFO] started frobbing rustmx/workshop-rocket-meetup008
[INFO] finished frobbing rustmx/workshop-rocket-meetup008
[INFO] frobbed toml for rustmx/workshop-rocket-meetup008 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustmx/workshop-rocket-meetup008/Cargo.toml
[INFO] crate rustmx/workshop-rocket-meetup008 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 rustmx/workshop-rocket-meetup008 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/rustmx/workshop-rocket-meetup008:/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] 82687b40aeeb0fc2b86e1b71f5a23518fab79747814a87459f0acec3aac70642
[INFO] running `"docker" "start" "-a" "82687b40aeeb0fc2b86e1b71f5a23518fab79747814a87459f0acec3aac70642"`
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]    Compiling either v1.3.0
[INFO] [stderr]    Compiling libc v0.2.33
[INFO] [stderr]    Compiling lazy_static v0.2.9
[INFO] [stderr]    Compiling futures v0.1.17
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]    Compiling num-traits v0.1.40
[INFO] [stderr]    Compiling log v0.3.8
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling percent-encoding v1.0.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:32
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[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 `yansi`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "82687b40aeeb0fc2b86e1b71f5a23518fab79747814a87459f0acec3aac70642"`
[INFO] running `"docker" "rm" "-f" "82687b40aeeb0fc2b86e1b71f5a23518fab79747814a87459f0acec3aac70642"`
[INFO] [stdout] 82687b40aeeb0fc2b86e1b71f5a23518fab79747814a87459f0acec3aac70642