[INFO] crate ascesis 0.0.1 is already in cache
[INFO] testing ascesis-0.0.1 against 1.38.0 for beta-1.39-1
[INFO] extracting crate ascesis 0.0.1 into work/builds/worker-2/source
[INFO] validating manifest of crates.io crate ascesis 0.0.1 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ascesis 0.0.1
[INFO] finished tweaking crates.io crate ascesis 0.0.1
[INFO] tweaked toml for crates.io crate ascesis 0.0.1 written to work/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate ascesis 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 254dd70b9ab4a981e578e918e2e6b1b0b8b8f7e1c999794e2db4101a6bb6c5fc
[INFO] running `"docker" "start" "-a" "254dd70b9ab4a981e578e918e2e6b1b0b8b8f7e1c999794e2db4101a6bb6c5fc"`
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling lalrpop-util v0.17.1
[INFO] [stderr]    Compiling enquote v1.0.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling ena v0.13.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling fern v0.5.8
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.1
[INFO] [stderr]    Compiling ascesis v0.0.1 (/opt/rustwide/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(slice_partition_dedup)]
[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 `ascesis`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "254dd70b9ab4a981e578e918e2e6b1b0b8b8f7e1c999794e2db4101a6bb6c5fc"`
[INFO] running `"docker" "rm" "-f" "254dd70b9ab4a981e578e918e2e6b1b0b8b8f7e1c999794e2db4101a6bb6c5fc"`
[INFO] [stdout] 254dd70b9ab4a981e578e918e2e6b1b0b8b8f7e1c999794e2db4101a6bb6c5fc