[INFO] updating cached repository vlmonk/advent-18-day07
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vlmonk/advent-18-day07
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vlmonk/advent-18-day07" "work/ex/beta-1.38-1/sources/1.37.0/gh/vlmonk/advent-18-day07"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/vlmonk/advent-18-day07'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vlmonk/advent-18-day07" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vlmonk/advent-18-day07"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vlmonk/advent-18-day07'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 25b450bd5607fdd044773d9438ebac4ba3cf2cec
[INFO] sha for GitHub repo vlmonk/advent-18-day07: 25b450bd5607fdd044773d9438ebac4ba3cf2cec
[INFO] validating manifest of vlmonk/advent-18-day07 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 vlmonk/advent-18-day07 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 vlmonk/advent-18-day07
[INFO] finished frobbing vlmonk/advent-18-day07
[INFO] frobbed toml for vlmonk/advent-18-day07 written to work/ex/beta-1.38-1/sources/1.37.0/gh/vlmonk/advent-18-day07/Cargo.toml
[INFO] started frobbing vlmonk/advent-18-day07
[INFO] finished frobbing vlmonk/advent-18-day07
[INFO] frobbed toml for vlmonk/advent-18-day07 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vlmonk/advent-18-day07/Cargo.toml
[INFO] crate vlmonk/advent-18-day07 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 vlmonk/advent-18-day07 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-4/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/vlmonk/advent-18-day07:/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] cf8d76b6ee4b3f311dea513ffba2561708ab76116722e6e63e0075da2d0aa7df
[INFO] running `"docker" "start" "-a" "cf8d76b6ee4b3f311dea513ffba2561708ab76116722e6e63e0075da2d0aa7df"`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling day07 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(duration_as_u128)]
[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 `day07`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cf8d76b6ee4b3f311dea513ffba2561708ab76116722e6e63e0075da2d0aa7df"`
[INFO] running `"docker" "rm" "-f" "cf8d76b6ee4b3f311dea513ffba2561708ab76116722e6e63e0075da2d0aa7df"`
[INFO] [stdout] cf8d76b6ee4b3f311dea513ffba2561708ab76116722e6e63e0075da2d0aa7df