[INFO] crate pumpkindb_engine 0.2.0 is already in cache
[INFO] testing pumpkindb_engine-0.2.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate pumpkindb_engine 0.2.0 into work/builds/worker-0/source
[INFO] validating manifest of crates.io crate pumpkindb_engine 0.2.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate pumpkindb_engine 0.2.0
[INFO] finished tweaking crates.io crate pumpkindb_engine 0.2.0
[INFO] tweaked toml for crates.io crate pumpkindb_engine 0.2.0 written to work/builds/worker-0/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] db39c2f63d596c5804a180273cd67339c1d3483be24df1e7fc02589a8c36d8d3
[INFO] running `"docker" "start" "-a" "db39c2f63d596c5804a180273cd67339c1d3483be24df1e7fc02589a8c36d8d3"`
[INFO] [stderr]    Compiling linked-hash-map v0.3.0
[INFO] [stderr]    Compiling hex-slice v0.1.4
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling supercow v0.1.0
[INFO] [stderr]    Compiling log-mdc v0.1.0
[INFO] [stderr]    Compiling liblmdb-sys v0.2.2
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling toml v0.3.2
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling memmap v0.5.2
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling serde_cbor v0.6.1
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling snowflake v1.3.0
[INFO] [stderr]    Compiling ordered-float v0.4.0
[INFO] [stderr]    Compiling chrono v0.3.0
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling serde-value v0.4.1
[INFO] [stderr]    Compiling serde_yaml v0.6.2
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling suppositions v0.1.4
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling uuid v0.4.0
[INFO] [stderr]    Compiling config v0.3.1
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/config-0.3.1/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(drop_types_in_const)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/config-0.3.1/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(trace_macros)]
[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 `config`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "db39c2f63d596c5804a180273cd67339c1d3483be24df1e7fc02589a8c36d8d3"`
[INFO] running `"docker" "rm" "-f" "db39c2f63d596c5804a180273cd67339c1d3483be24df1e7fc02589a8c36d8d3"`
[INFO] [stdout] db39c2f63d596c5804a180273cd67339c1d3483be24df1e7fc02589a8c36d8d3