[INFO] crate bitcask-rs 0.1.1 is already in cache
[INFO] extracting crate bitcask-rs 0.1.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/bitcask-rs/0.1.1
[INFO] extracting crate bitcask-rs 0.1.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/bitcask-rs/0.1.1
[INFO] validating manifest of bitcask-rs-0.1.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bitcask-rs-0.1.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bitcask-rs-0.1.1
[INFO] finished frobbing bitcask-rs-0.1.1
[INFO] frobbed toml for bitcask-rs-0.1.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/bitcask-rs/0.1.1/Cargo.toml
[INFO] started frobbing bitcask-rs-0.1.1
[INFO] finished frobbing bitcask-rs-0.1.1
[INFO] frobbed toml for bitcask-rs-0.1.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/bitcask-rs/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing bitcask-rs-0.1.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/bitcask-rs/0.1.1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 1904d2470cecb93a610460758916e50a129b17c54eaf7d9e15b40d4291c6c558
[INFO] running `"docker" "start" "-a" "1904d2470cecb93a610460758916e50a129b17c54eaf7d9e15b40d4291c6c558"`
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]    Compiling arc-swap v0.3.11
[INFO] [stderr]    Compiling log-mdc v0.1.0
[INFO] [stderr]    Compiling integer-encoding v1.0.7
[INFO] [stderr]    Compiling unsafe-any v0.4.2
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling io-at v0.4.1
[INFO] [stderr]    Compiling derive_builder_core v0.2.0
[INFO] [stderr]    Compiling serde_yaml v0.8.9
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling serde-value v0.5.3
[INFO] [stderr]    Compiling twox-hash v1.4.2
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling log4rs v0.8.3
[INFO] [stderr]    Compiling bitcask-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[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 `bitcask-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1904d2470cecb93a610460758916e50a129b17c54eaf7d9e15b40d4291c6c558"`
[INFO] running `"docker" "rm" "-f" "1904d2470cecb93a610460758916e50a129b17c54eaf7d9e15b40d4291c6c558"`
[INFO] [stdout] 1904d2470cecb93a610460758916e50a129b17c54eaf7d9e15b40d4291c6c558