[INFO] cloning repository fcsonline/datalex
[INFO] running `"git" "clone" "--bare" "git://github.com/fcsonline/datalex.git" "work/cache/sources/gh/fcsonline/datalex"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/fcsonline/datalex'...
[INFO] running `"git" "clone" "work/cache/sources/gh/fcsonline/datalex" "work/ex/beta-1.37-6/sources/1.36.0/gh/fcsonline/datalex"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/fcsonline/datalex'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fcsonline/datalex" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fcsonline/datalex"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fcsonline/datalex'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 69ab3def84a10f47205d798cf33b1cff7b1fcab2
[INFO] sha for GitHub repo fcsonline/datalex: 69ab3def84a10f47205d798cf33b1cff7b1fcab2
[INFO] validating manifest of fcsonline/datalex 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 fcsonline/datalex 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 fcsonline/datalex
[INFO] finished frobbing fcsonline/datalex
[INFO] frobbed toml for fcsonline/datalex written to work/ex/beta-1.37-6/sources/1.36.0/gh/fcsonline/datalex/Cargo.toml
[INFO] started frobbing fcsonline/datalex
[INFO] finished frobbing fcsonline/datalex
[INFO] frobbed toml for fcsonline/datalex written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fcsonline/datalex/Cargo.toml
[INFO] crate fcsonline/datalex 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing fcsonline/datalex 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-0/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/fcsonline/datalex:/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] 500e4b0cac9f0d87f89c48125534798448ecec50896cfcffcf9ca4bfcb890f14
[INFO] running `"docker" "start" "-a" "500e4b0cac9f0d87f89c48125534798448ecec50896cfcffcf9ca4bfcb890f14"`
[INFO] [stderr] warning: unused manifest key: package.proc-macro
[INFO] [stderr]    Compiling syn v0.15.37
[INFO] [stderr]    Compiling lalr v0.0.2
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling redfa v0.0.2
[INFO] [stderr]    Compiling plex v0.2.5
[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/plex-0.2.5/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(proc_macro_diagnostic)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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/plex-0.2.5/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(proc_macro_span)]
[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 `plex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "500e4b0cac9f0d87f89c48125534798448ecec50896cfcffcf9ca4bfcb890f14"`
[INFO] running `"docker" "rm" "-f" "500e4b0cac9f0d87f89c48125534798448ecec50896cfcffcf9ca4bfcb890f14"`
[INFO] [stdout] 500e4b0cac9f0d87f89c48125534798448ecec50896cfcffcf9ca4bfcb890f14