[INFO] crate nature_retry 0.0.1 is already in cache
[INFO] testing nature_retry-0.0.1 against 1.38.0 for beta-1.39-1
[INFO] extracting crate nature_retry 0.0.1 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate nature_retry 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 nature_retry 0.0.1
[INFO] finished tweaking crates.io crate nature_retry 0.0.1
[INFO] tweaked toml for crates.io crate nature_retry 0.0.1 written to work/builds/worker-7/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/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] af805dce17e9ba3d88c86b0417d5bcbef43300c6062789a283745c3a4b121d8e
[INFO] running `"docker" "start" "-a" "af805dce17e9ba3d88c86b0417d5bcbef43300c6062789a283745c3a4b121d8e"`
[INFO] [stderr]    Compiling lru_time_cache v0.8.1
[INFO] [stderr]    Compiling libsqlite3-sys v0.12.0
[INFO] [stderr]    Compiling mysqlclient-sys v0.2.4
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling fern v0.5.8
[INFO] [stderr]    Compiling diesel_derives v1.4.0
[INFO] [stderr]    Compiling actix_derive v0.3.2
[INFO] [stderr]    Compiling derive-error-chain v0.11.2
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling chrono v0.4.9
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-udp v0.1.5
[INFO] [stderr]    Compiling tokio-signal v0.2.7
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling trust-dns-proto v0.6.3
[INFO] [stderr]    Compiling trust-dns-proto v0.5.0
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling r2d2 v0.8.5
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling trust-dns-resolver v0.10.3
[INFO] [stderr]    Compiling dotenv v0.11.0
[INFO] [stderr]    Compiling diesel v1.4.2
[INFO] [stderr]    Compiling actix v0.7.9
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling reqwest v0.9.22
[INFO] [stderr]    Compiling nature_common v0.0.1
[INFO] [stderr]    Compiling r2d2-diesel v1.0.0
[INFO] [stderr]    Compiling nature_db v0.0.1
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nature_db-0.0.1/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nature_db-0.0.1/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(rustc_private)]
[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 `nature_db`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "af805dce17e9ba3d88c86b0417d5bcbef43300c6062789a283745c3a4b121d8e"`
[INFO] running `"docker" "rm" "-f" "af805dce17e9ba3d88c86b0417d5bcbef43300c6062789a283745c3a4b121d8e"`
[INFO] [stdout] af805dce17e9ba3d88c86b0417d5bcbef43300c6062789a283745c3a4b121d8e