[INFO] updating cached repository svartalf/rust-advent-of-code-2017
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/svartalf/rust-advent-of-code-2017
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/svartalf/rust-advent-of-code-2017" "work/ex/beta-1.38-1/sources/1.37.0/gh/svartalf/rust-advent-of-code-2017"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/svartalf/rust-advent-of-code-2017'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/svartalf/rust-advent-of-code-2017" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/svartalf/rust-advent-of-code-2017"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/svartalf/rust-advent-of-code-2017'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 43c7b7c4e5fda091ba924f025b3e4b57070ee6bf
[INFO] sha for GitHub repo svartalf/rust-advent-of-code-2017: 43c7b7c4e5fda091ba924f025b3e4b57070ee6bf
[INFO] validating manifest of svartalf/rust-advent-of-code-2017 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 svartalf/rust-advent-of-code-2017 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 svartalf/rust-advent-of-code-2017
[INFO] finished frobbing svartalf/rust-advent-of-code-2017
[INFO] frobbed toml for svartalf/rust-advent-of-code-2017 written to work/ex/beta-1.38-1/sources/1.37.0/gh/svartalf/rust-advent-of-code-2017/Cargo.toml
[INFO] started frobbing svartalf/rust-advent-of-code-2017
[INFO] finished frobbing svartalf/rust-advent-of-code-2017
[INFO] frobbed toml for svartalf/rust-advent-of-code-2017 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/svartalf/rust-advent-of-code-2017/Cargo.toml
[INFO] crate svartalf/rust-advent-of-code-2017 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 svartalf/rust-advent-of-code-2017 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/svartalf/rust-advent-of-code-2017:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e17e24141dda093d8ac074976e27c781f59983faa992379e6e3cbaa4f871ffbd
[INFO] running `"docker" "start" "-a" "e17e24141dda093d8ac074976e27c781f59983faa992379e6e3cbaa4f871ffbd"`
[INFO] [stderr]    Compiling aoc2017 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(try_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/days/day19/common.rs:124:41
[INFO] [stderr]     |
[INFO] [stderr] 124 |                             letter @ 'A'...'Z' => Cell::Letter(letter),
[INFO] [stderr]     |                                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[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 `aoc2017`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e17e24141dda093d8ac074976e27c781f59983faa992379e6e3cbaa4f871ffbd"`
[INFO] running `"docker" "rm" "-f" "e17e24141dda093d8ac074976e27c781f59983faa992379e6e3cbaa4f871ffbd"`
[INFO] [stdout] e17e24141dda093d8ac074976e27c781f59983faa992379e6e3cbaa4f871ffbd