[INFO] updating cached repository matthiaskrgr/cargo-rebuild-check
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matthiaskrgr/cargo-rebuild-check
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matthiaskrgr/cargo-rebuild-check" "work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/cargo-rebuild-check"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/cargo-rebuild-check'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matthiaskrgr/cargo-rebuild-check" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matthiaskrgr/cargo-rebuild-check"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matthiaskrgr/cargo-rebuild-check'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d54fa01899ab0b14fd29fa0e585e8b1bad9bfefa
[INFO] sha for GitHub repo matthiaskrgr/cargo-rebuild-check: d54fa01899ab0b14fd29fa0e585e8b1bad9bfefa
[INFO] validating manifest of matthiaskrgr/cargo-rebuild-check 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 matthiaskrgr/cargo-rebuild-check 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 matthiaskrgr/cargo-rebuild-check
[INFO] finished frobbing matthiaskrgr/cargo-rebuild-check
[INFO] frobbed toml for matthiaskrgr/cargo-rebuild-check written to work/ex/beta-1.38-1/sources/1.37.0/gh/matthiaskrgr/cargo-rebuild-check/Cargo.toml
[INFO] started frobbing matthiaskrgr/cargo-rebuild-check
[INFO] finished frobbing matthiaskrgr/cargo-rebuild-check
[INFO] frobbed toml for matthiaskrgr/cargo-rebuild-check written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matthiaskrgr/cargo-rebuild-check/Cargo.toml
[INFO] crate matthiaskrgr/cargo-rebuild-check 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 matthiaskrgr/cargo-rebuild-check 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/gh/matthiaskrgr/cargo-rebuild-check:/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] 29cddcc2b8fc8e51f0c0bf6d1bd20e9042aab56a9355bb65de7e3eec352662be
[INFO] running `"docker" "start" "-a" "29cddcc2b8fc8e51f0c0bf6d1bd20e9042aab56a9355bb65de7e3eec352662be"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling openssl v0.10.10
[INFO] [stderr]    Compiling home v0.3.3
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling libz-sys v1.0.18
[INFO] [stderr]    Compiling cmake v0.1.31
[INFO] [stderr]    Compiling curl-sys v0.4.6
[INFO] [stderr]    Compiling filetime v0.2.1
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling jobserver v0.1.11
[INFO] [stderr]    Compiling tar v0.4.16
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling tempfile v3.0.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling libssh2-sys v0.2.8
[INFO] [stderr]    Compiling libgit2-sys v0.7.5
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling flate2 v1.0.1
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling globset v0.4.0
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling ignore v0.4.2
[INFO] [stderr]    Compiling crypto-hash v0.3.1
[INFO] [stderr]    Compiling curl v0.4.12
[INFO] [stderr]    Compiling crates-io v0.16.0
[INFO] [stderr]    Compiling git2 v0.7.2
[INFO] [stderr]    Compiling git2-curl v0.8.1
[INFO] [stderr]    Compiling cargo v0.28.0
[INFO] [stderr]    Compiling cargo-rebuild-check v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning[E0705]: the feature `rust_2018_preview` is included in the Rust 2018 edition
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(rust_2018_preview, use_extern_macros)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(rust_2018_preview, use_extern_macros)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0705.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cargo-rebuild-check`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "29cddcc2b8fc8e51f0c0bf6d1bd20e9042aab56a9355bb65de7e3eec352662be"`
[INFO] running `"docker" "rm" "-f" "29cddcc2b8fc8e51f0c0bf6d1bd20e9042aab56a9355bb65de7e3eec352662be"`
[INFO] [stdout] 29cddcc2b8fc8e51f0c0bf6d1bd20e9042aab56a9355bb65de7e3eec352662be