[INFO] crate heim-disk 0.0.5 is already in cache
[INFO] extracting crate heim-disk 0.0.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/heim-disk/0.0.5
[INFO] extracting crate heim-disk 0.0.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/heim-disk/0.0.5
[INFO] validating manifest of heim-disk-0.0.5 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 heim-disk-0.0.5 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 heim-disk-0.0.5
[INFO] finished frobbing heim-disk-0.0.5
[INFO] frobbed toml for heim-disk-0.0.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/heim-disk/0.0.5/Cargo.toml
[INFO] started frobbing heim-disk-0.0.5
[INFO] finished frobbing heim-disk-0.0.5
[INFO] frobbed toml for heim-disk-0.0.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/heim-disk/0.0.5/Cargo.toml
[INFO] crate heim-disk-0.0.5 already has a lockfile, it will not be regenerated
[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 heim-disk-0.0.5 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-7/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/heim-disk/0.0.5:/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] 81964f8292bb9af0462be23b61d3805c2d7bed8c7f6a80fb179de99456e8d07a
[INFO] running `"docker" "start" "-a" "81964f8292bb9af0462be23b61d3805c2d7bed8c7f6a80fb179de99456e8d07a"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling heim-common v0.0.5
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling heim-derive v0.0.5
[INFO] [stderr]    Compiling heim-disk v0.0.5 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.33s
[INFO] running `"docker" "inspect" "81964f8292bb9af0462be23b61d3805c2d7bed8c7f6a80fb179de99456e8d07a"`
[INFO] running `"docker" "rm" "-f" "81964f8292bb9af0462be23b61d3805c2d7bed8c7f6a80fb179de99456e8d07a"`
[INFO] [stdout] 81964f8292bb9af0462be23b61d3805c2d7bed8c7f6a80fb179de99456e8d07a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/heim-disk/0.0.5:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] e10d0ab52378a1785f1616d3893c3344f0c77f64008338c6566231de7d6e8faf
[INFO] running `"docker" "start" "-a" "e10d0ab52378a1785f1616d3893c3344f0c77f64008338c6566231de7d6e8faf"`
[INFO] [stderr]    Compiling pulldown-cmark v0.4.1
[INFO] [stderr]    Compiling async-ready v3.0.0
[INFO] [stderr]    Compiling async-datagram v3.0.0
[INFO] [stderr]    Compiling async-datagram v2.2.0
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-datagram-2.2.0/src/lib.rs:43:1
[INFO] [stderr]    |
[INFO] [stderr] 43 | #![feature(futures_api)]
[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 `async-datagram`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e10d0ab52378a1785f1616d3893c3344f0c77f64008338c6566231de7d6e8faf"`
[INFO] running `"docker" "rm" "-f" "e10d0ab52378a1785f1616d3893c3344f0c77f64008338c6566231de7d6e8faf"`
[INFO] [stdout] e10d0ab52378a1785f1616d3893c3344f0c77f64008338c6566231de7d6e8faf