[INFO] updating cached repository Rejolut/hedera-ios-sdk
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Rejolut/hedera-ios-sdk
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Rejolut/hedera-ios-sdk" "work/ex/beta-1.38-1/sources/1.37.0/gh/Rejolut/hedera-ios-sdk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Rejolut/hedera-ios-sdk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Rejolut/hedera-ios-sdk" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Rejolut/hedera-ios-sdk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Rejolut/hedera-ios-sdk'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] be1aec9039e649d6f59893ed1f884e3312eea57d
[INFO] sha for GitHub repo Rejolut/hedera-ios-sdk: be1aec9039e649d6f59893ed1f884e3312eea57d
[INFO] validating manifest of Rejolut/hedera-ios-sdk 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 Rejolut/hedera-ios-sdk 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 Rejolut/hedera-ios-sdk
[INFO] finished frobbing Rejolut/hedera-ios-sdk
[INFO] frobbed toml for Rejolut/hedera-ios-sdk written to work/ex/beta-1.38-1/sources/1.37.0/gh/Rejolut/hedera-ios-sdk/Cargo.toml
[INFO] started frobbing Rejolut/hedera-ios-sdk
[INFO] finished frobbing Rejolut/hedera-ios-sdk
[INFO] frobbed toml for Rejolut/hedera-ios-sdk written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Rejolut/hedera-ios-sdk/Cargo.toml
[INFO] crate Rejolut/hedera-ios-sdk 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 Rejolut/hedera-ios-sdk 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Rejolut/hedera-ios-sdk:/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] b3e6cd884debd171d300c1eeb69b9a1dd3b5f61db25abfde32bbdb00b6746840
[INFO] running `"docker" "start" "-a" "b3e6cd884debd171d300c1eeb69b9a1dd3b5f61db25abfde32bbdb00b6746840"`
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling protobuf v2.3.0
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.2
[INFO] [stderr]    Compiling subtle v2.0.0
[INFO] [stderr]    Compiling httpbis v0.7.0
[INFO] [stderr]    Compiling query_interface v0.3.5
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/subtle-2.0.0/src/lib.rs:12:34
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![cfg_attr(feature = "nightly", feature(asm))]
[INFO] [stderr]    |                                  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/subtle-2.0.0/src/lib.rs:13:34
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![cfg_attr(feature = "nightly", feature(external_doc))]
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `subtle`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-0.1.25/src/lib.rs:161:34
[INFO] [stderr]     |
[INFO] [stderr] 161 | #![cfg_attr(feature = "nightly", feature(pin))]
[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 `futures`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b3e6cd884debd171d300c1eeb69b9a1dd3b5f61db25abfde32bbdb00b6746840"`
[INFO] running `"docker" "rm" "-f" "b3e6cd884debd171d300c1eeb69b9a1dd3b5f61db25abfde32bbdb00b6746840"`
[INFO] [stdout] b3e6cd884debd171d300c1eeb69b9a1dd3b5f61db25abfde32bbdb00b6746840