[INFO] updating cached repository WiebeCnossen/a17d22
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/WiebeCnossen/a17d22
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/WiebeCnossen/a17d22" "work/ex/beta-1.38-1/sources/1.37.0/gh/WiebeCnossen/a17d22"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/WiebeCnossen/a17d22'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/WiebeCnossen/a17d22" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/WiebeCnossen/a17d22"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/WiebeCnossen/a17d22'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9bdb27ccce4c825bc111bc947459ac39a8eedcc9
[INFO] sha for GitHub repo WiebeCnossen/a17d22: 9bdb27ccce4c825bc111bc947459ac39a8eedcc9
[INFO] validating manifest of WiebeCnossen/a17d22 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 WiebeCnossen/a17d22 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 WiebeCnossen/a17d22
[INFO] finished frobbing WiebeCnossen/a17d22
[INFO] frobbed toml for WiebeCnossen/a17d22 written to work/ex/beta-1.38-1/sources/1.37.0/gh/WiebeCnossen/a17d22/Cargo.toml
[INFO] started frobbing WiebeCnossen/a17d22
[INFO] finished frobbing WiebeCnossen/a17d22
[INFO] frobbed toml for WiebeCnossen/a17d22 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/WiebeCnossen/a17d22/Cargo.toml
[INFO] crate WiebeCnossen/a17d22 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 WiebeCnossen/a17d22 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-6/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/WiebeCnossen/a17d22:/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] 108d83c42d33144d5b4181ddb8529e5f3a5a22600ac1f06148b7d9ef00e8308f
[INFO] running `"docker" "start" "-a" "108d83c42d33144d5b4181ddb8529e5f3a5a22600ac1f06148b7d9ef00e8308f"`
[INFO] [stderr]    Compiling a17d22 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(entry_and_modify)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:157:27
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn timed(label: &str, f: &Fn()) {
[INFO] [stderr]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:277:28
[INFO] [stderr]     |
[INFO] [stderr] 277 | fn test_input<Grid>(read: &Fn(&[&str]) -> Grid) -> Grid {
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&[&str]) -> Grid`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:281:33
[INFO] [stderr]     |
[INFO] [stderr] 281 | fn challenge_input<Grid>(read: &Fn(&[&str]) -> Grid) -> Grid {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&[&str]) -> Grid`
[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 `a17d22`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "108d83c42d33144d5b4181ddb8529e5f3a5a22600ac1f06148b7d9ef00e8308f"`
[INFO] running `"docker" "rm" "-f" "108d83c42d33144d5b4181ddb8529e5f3a5a22600ac1f06148b7d9ef00e8308f"`
[INFO] [stdout] 108d83c42d33144d5b4181ddb8529e5f3a5a22600ac1f06148b7d9ef00e8308f