[INFO] updating cached repository stefanoc/advent
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stefanoc/advent
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stefanoc/advent" "work/ex/beta-1.38-1/sources/1.37.0/gh/stefanoc/advent"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/stefanoc/advent'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stefanoc/advent" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stefanoc/advent"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stefanoc/advent'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 856f78d921d2829f0809363d24d0351b3ea81657
[INFO] sha for GitHub repo stefanoc/advent: 856f78d921d2829f0809363d24d0351b3ea81657
[INFO] validating manifest of stefanoc/advent 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 stefanoc/advent 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 stefanoc/advent
[INFO] finished frobbing stefanoc/advent
[INFO] frobbed toml for stefanoc/advent written to work/ex/beta-1.38-1/sources/1.37.0/gh/stefanoc/advent/Cargo.toml
[INFO] started frobbing stefanoc/advent
[INFO] finished frobbing stefanoc/advent
[INFO] frobbed toml for stefanoc/advent written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stefanoc/advent/Cargo.toml
[INFO] crate stefanoc/advent 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/stefanoc/advent/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 stefanoc/advent 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/stefanoc/advent:/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] 1b9e2220cd824cee8366fb5ab730644b2bc45d486c0b62e3f8c15d0839869f41
[INFO] running `"docker" "start" "-a" "1b9e2220cd824cee8366fb5ab730644b2bc45d486c0b62e3f8c15d0839869f41"`
[INFO] [stderr]    Compiling md5 v0.6.1
[INFO] [stderr]    Compiling iterslide v1.0.1
[INFO] [stderr]    Compiling permutohedron v0.2.4
[INFO] [stderr]    Compiling advent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(str_char)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/eleven.rs:20:60
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let has_seq = s.chars().slide(3).any(|seq| is_sequence(&seq));
[INFO] [stderr]    |                                                            ^^^^ expected slice, found struct `std::collections::VecDeque`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[char]`
[INFO] [stderr]               found type `&std::collections::VecDeque<char>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `advent`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1b9e2220cd824cee8366fb5ab730644b2bc45d486c0b62e3f8c15d0839869f41"`
[INFO] running `"docker" "rm" "-f" "1b9e2220cd824cee8366fb5ab730644b2bc45d486c0b62e3f8c15d0839869f41"`
[INFO] [stdout] 1b9e2220cd824cee8366fb5ab730644b2bc45d486c0b62e3f8c15d0839869f41