[INFO] crate base32768 0.1.0 is already in cache
[INFO] extracting crate base32768 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/base32768/0.1.0
[INFO] extracting crate base32768 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/base32768/0.1.0
[INFO] validating manifest of base32768-0.1.0 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 base32768-0.1.0 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 base32768-0.1.0
[INFO] finished frobbing base32768-0.1.0
[INFO] frobbed toml for base32768-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/base32768/0.1.0/Cargo.toml
[INFO] started frobbing base32768-0.1.0
[INFO] finished frobbing base32768-0.1.0
[INFO] frobbed toml for base32768-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/base32768/0.1.0/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 base32768-0.1.0 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/base32768/0.1.0:/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] 3ca871aed1f4cf95d3dad4cf26bb97476f2fe4e50bf0125f2a3e1605688a32c3
[INFO] running `"docker" "start" "-a" "3ca871aed1f4cf95d3dad4cf26bb97476f2fe4e50bf0125f2a3e1605688a32c3"`
[INFO] [stderr]    Compiling base32768 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / lazy_static! {
[INFO] [stderr] 22 | |     static ref LOOKUP_TABLES: LookupTables = {
[INFO] [stderr] 23 | |         let mut encode = HashMap::new();
[INFO] [stderr] 24 | |         let mut decode = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 65 | |     };
[INFO] [stderr] 66 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[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 `base32768`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3ca871aed1f4cf95d3dad4cf26bb97476f2fe4e50bf0125f2a3e1605688a32c3"`
[INFO] running `"docker" "rm" "-f" "3ca871aed1f4cf95d3dad4cf26bb97476f2fe4e50bf0125f2a3e1605688a32c3"`
[INFO] [stdout] 3ca871aed1f4cf95d3dad4cf26bb97476f2fe4e50bf0125f2a3e1605688a32c3