[INFO] updating cached repository ollieatkinson/2017_sky_christmas_challenge
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ollieatkinson/2017_sky_christmas_challenge
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ollieatkinson/2017_sky_christmas_challenge" "work/ex/beta-1.38-1/sources/1.37.0/gh/ollieatkinson/2017_sky_christmas_challenge"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ollieatkinson/2017_sky_christmas_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ollieatkinson/2017_sky_christmas_challenge" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ollieatkinson/2017_sky_christmas_challenge"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ollieatkinson/2017_sky_christmas_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4763aee435f5c5306358a0eebfeb85fdc58ee8b8
[INFO] sha for GitHub repo ollieatkinson/2017_sky_christmas_challenge: 4763aee435f5c5306358a0eebfeb85fdc58ee8b8
[INFO] validating manifest of ollieatkinson/2017_sky_christmas_challenge 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 ollieatkinson/2017_sky_christmas_challenge 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 ollieatkinson/2017_sky_christmas_challenge
[INFO] finished frobbing ollieatkinson/2017_sky_christmas_challenge
[INFO] frobbed toml for ollieatkinson/2017_sky_christmas_challenge written to work/ex/beta-1.38-1/sources/1.37.0/gh/ollieatkinson/2017_sky_christmas_challenge/Cargo.toml
[INFO] started frobbing ollieatkinson/2017_sky_christmas_challenge
[INFO] finished frobbing ollieatkinson/2017_sky_christmas_challenge
[INFO] frobbed toml for ollieatkinson/2017_sky_christmas_challenge written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ollieatkinson/2017_sky_christmas_challenge/Cargo.toml
[INFO] crate ollieatkinson/2017_sky_christmas_challenge 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 ollieatkinson/2017_sky_christmas_challenge 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-3/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/ollieatkinson/2017_sky_christmas_challenge:/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] 10c619a0d1d22e9f51aa75860d12ed01e1a4696f1cbe3f8ae686a27926e77ef6
[INFO] running `"docker" "start" "-a" "10c619a0d1d22e9f51aa75860d12ed01e1a4696f1cbe3f8ae686a27926e77ef6"`
[INFO] [stderr]    Compiling xmas_challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: environment variable `PRESENTS` not defined
[INFO] [stderr]  --> src/main.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let input = env!("PRESENTS");
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `xmas_challenge`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "10c619a0d1d22e9f51aa75860d12ed01e1a4696f1cbe3f8ae686a27926e77ef6"`
[INFO] running `"docker" "rm" "-f" "10c619a0d1d22e9f51aa75860d12ed01e1a4696f1cbe3f8ae686a27926e77ef6"`
[INFO] [stdout] 10c619a0d1d22e9f51aa75860d12ed01e1a4696f1cbe3f8ae686a27926e77ef6