[INFO] cloning repository ZuiSong/chen_lang
[INFO] running `"git" "clone" "--bare" "git://github.com/ZuiSong/chen_lang.git" "work/cache/sources/gh/ZuiSong/chen_lang"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ZuiSong/chen_lang'...
[INFO] running `"git" "clone" "work/cache/sources/gh/ZuiSong/chen_lang" "work/ex/beta-1.37-6/sources/1.36.0/gh/ZuiSong/chen_lang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ZuiSong/chen_lang'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ZuiSong/chen_lang" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ZuiSong/chen_lang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ZuiSong/chen_lang'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] beab6efba01877c67cfbfc629ef2dacc831137ec
[INFO] sha for GitHub repo ZuiSong/chen_lang: beab6efba01877c67cfbfc629ef2dacc831137ec
[INFO] validating manifest of ZuiSong/chen_lang on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ZuiSong/chen_lang on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ZuiSong/chen_lang
[INFO] finished frobbing ZuiSong/chen_lang
[INFO] frobbed toml for ZuiSong/chen_lang written to work/ex/beta-1.37-6/sources/1.36.0/gh/ZuiSong/chen_lang/Cargo.toml
[INFO] started frobbing ZuiSong/chen_lang
[INFO] finished frobbing ZuiSong/chen_lang
[INFO] frobbed toml for ZuiSong/chen_lang written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ZuiSong/chen_lang/Cargo.toml
[INFO] crate ZuiSong/chen_lang already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ZuiSong/chen_lang against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ZuiSong/chen_lang:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] a7b0d4c73d863faa7e0b3ba250e8cdaa4267b643ac4fc125f61d661fa8ccbc5f
[INFO] running `"docker" "start" "-a" "a7b0d4c73d863faa7e0b3ba250e8cdaa4267b643ac4fc125f61d661fa8ccbc5f"`
[INFO] [stderr]    Compiling syn v0.15.38
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling backtrace-sys v0.1.29
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling simple_logger v1.3.0
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling chen_lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(box_syntax)]
[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 `chen_lang`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a7b0d4c73d863faa7e0b3ba250e8cdaa4267b643ac4fc125f61d661fa8ccbc5f"`
[INFO] running `"docker" "rm" "-f" "a7b0d4c73d863faa7e0b3ba250e8cdaa4267b643ac4fc125f61d661fa8ccbc5f"`
[INFO] [stdout] a7b0d4c73d863faa7e0b3ba250e8cdaa4267b643ac4fc125f61d661fa8ccbc5f