[INFO] crate cryptonote-crypto 0.2.2 is already in cache
[INFO] extracting crate cryptonote-crypto 0.2.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/cryptonote-crypto/0.2.2
[INFO] extracting crate cryptonote-crypto 0.2.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cryptonote-crypto/0.2.2
[INFO] validating manifest of cryptonote-crypto-0.2.2 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 cryptonote-crypto-0.2.2 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 cryptonote-crypto-0.2.2
[INFO] finished frobbing cryptonote-crypto-0.2.2
[INFO] frobbed toml for cryptonote-crypto-0.2.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cryptonote-crypto/0.2.2/Cargo.toml
[INFO] started frobbing cryptonote-crypto-0.2.2
[INFO] finished frobbing cryptonote-crypto-0.2.2
[INFO] frobbed toml for cryptonote-crypto-0.2.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cryptonote-crypto/0.2.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 cryptonote-crypto-0.2.2 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-1/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/cryptonote-crypto/0.2.2:/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] 6f5d8fa8c53810cf5122f6e2ecc7b9a17531a71e8614ceb906e96981e30e26bb
[INFO] running `"docker" "start" "-a" "6f5d8fa8c53810cf5122f6e2ecc7b9a17531a71e8614ceb906e96981e30e26bb"`
[INFO] [stderr]    Compiling cryptonote-crypto v0.2.2 (/opt/crater/workdir)
[INFO] [stderr]    Compiling keccak v0.1.0
[INFO] [stderr]    Compiling keystream v1.0.0
[INFO] [stderr]    Compiling jh-ffi v0.5.0
[INFO] [stderr]    Compiling skein-ffi v0.5.0
[INFO] [stderr]    Compiling blake v2.0.0
[INFO] [stderr]    Compiling curve25519-dalek v1.2.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling groestl v0.8.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/build.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(rustc_private)]
[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 `cryptonote-crypto`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "6f5d8fa8c53810cf5122f6e2ecc7b9a17531a71e8614ceb906e96981e30e26bb"`
[INFO] running `"docker" "rm" "-f" "6f5d8fa8c53810cf5122f6e2ecc7b9a17531a71e8614ceb906e96981e30e26bb"`
[INFO] [stdout] 6f5d8fa8c53810cf5122f6e2ecc7b9a17531a71e8614ceb906e96981e30e26bb