[INFO] crate pharos 0.2.0 is already in cache
[INFO] extracting crate pharos 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/pharos/0.2.0
[INFO] extracting crate pharos 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pharos/0.2.0
[INFO] validating manifest of pharos-0.2.0 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 pharos-0.2.0 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 pharos-0.2.0
[INFO] finished frobbing pharos-0.2.0
[INFO] frobbed toml for pharos-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/pharos/0.2.0/Cargo.toml
[INFO] started frobbing pharos-0.2.0
[INFO] finished frobbing pharos-0.2.0
[INFO] frobbed toml for pharos-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pharos/0.2.0/Cargo.toml
[INFO] crate pharos-0.2.0 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 pharos-0.2.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pharos/0.2.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 92190a5ba822287a89fa0e39e8a7257e1b08f4d8d326c527256d288000f24a53
[INFO] running `"docker" "start" "-a" "92190a5ba822287a89fa0e39e8a7257e1b08f4d8d326c527256d288000f24a53"`
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling libc v0.2.53
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling pharos v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]    --> src/lib.rs:193:27
[INFO] [stderr]     |
[INFO] [stderr] 193 | #![ feature( async_await, await_macro ) ]
[INFO] [stderr]     |                           ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: subsumed by `.await` syntax
[INFO] [stderr]    --> src/lib.rs:193:27
[INFO] [stderr]     |
[INFO] [stderr] 193 | #![ feature( async_await, await_macro ) ]
[INFO] [stderr]     |                           ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]    --> src/lib.rs:193:1
[INFO] [stderr]     |
[INFO] [stderr] 193 | #![ feature( async_await, await_macro ) ]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `pharos`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "92190a5ba822287a89fa0e39e8a7257e1b08f4d8d326c527256d288000f24a53"`
[INFO] running `"docker" "rm" "-f" "92190a5ba822287a89fa0e39e8a7257e1b08f4d8d326c527256d288000f24a53"`
[INFO] [stdout] 92190a5ba822287a89fa0e39e8a7257e1b08f4d8d326c527256d288000f24a53