[INFO] updating cached repository simonvandel/fcbf
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/simonvandel/fcbf
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/simonvandel/fcbf" "work/ex/beta-1.38-1/sources/1.37.0/gh/simonvandel/fcbf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/simonvandel/fcbf'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/simonvandel/fcbf" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/simonvandel/fcbf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/simonvandel/fcbf'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 08439f0dc2e4d00fb8a3d6391842d47cdfe54178
[INFO] sha for GitHub repo simonvandel/fcbf: 08439f0dc2e4d00fb8a3d6391842d47cdfe54178
[INFO] validating manifest of simonvandel/fcbf 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 simonvandel/fcbf 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 simonvandel/fcbf
[INFO] finished frobbing simonvandel/fcbf
[INFO] frobbed toml for simonvandel/fcbf written to work/ex/beta-1.38-1/sources/1.37.0/gh/simonvandel/fcbf/Cargo.toml
[INFO] started frobbing simonvandel/fcbf
[INFO] finished frobbing simonvandel/fcbf
[INFO] frobbed toml for simonvandel/fcbf written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/simonvandel/fcbf/Cargo.toml
[INFO] crate simonvandel/fcbf 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing simonvandel/fcbf 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-5/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/simonvandel/fcbf:/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] 973a0cf5e2c76264e97fddea0b98e6f72c220cec52c40cb20d47ee7d2b915ec7
[INFO] running `"docker" "start" "-a" "973a0cf5e2c76264e97fddea0b98e6f72c220cec52c40cb20d47ee7d2b915ec7"`
[INFO] [stderr]    Compiling serde v1.0.45
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling noisy_float v0.1.4
[INFO] [stderr]    Compiling ndarray v0.11.2
[INFO] [stderr]    Compiling csv v1.0.0-beta.5
[INFO] [stderr]    Compiling fcbf v0.1.0 (/opt/crater/workdir)
[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(nll)]
[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 `fcbf`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "973a0cf5e2c76264e97fddea0b98e6f72c220cec52c40cb20d47ee7d2b915ec7"`
[INFO] running `"docker" "rm" "-f" "973a0cf5e2c76264e97fddea0b98e6f72c220cec52c40cb20d47ee7d2b915ec7"`
[INFO] [stdout] 973a0cf5e2c76264e97fddea0b98e6f72c220cec52c40cb20d47ee7d2b915ec7