[INFO] cloning repository https://github.com/WiebeCnossen/a17d22
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/WiebeCnossen/a17d22" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWiebeCnossen%2Fa17d22", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWiebeCnossen%2Fa17d22'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bdb27ccce4c825bc111bc947459ac39a8eedcc9
[INFO] testing WiebeCnossen/a17d22 against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWiebeCnossen%2Fa17d22" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/WiebeCnossen/a17d22 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/WiebeCnossen/a17d22
[INFO] finished tweaking git repo https://github.com/WiebeCnossen/a17d22
[INFO] tweaked toml for git repo https://github.com/WiebeCnossen/a17d22 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/WiebeCnossen/a17d22 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87f2e5a23751d995c2418b219d4fcec35be22e029cd6ba6d283fdd63379dad98
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "87f2e5a23751d995c2418b219d4fcec35be22e029cd6ba6d283fdd63379dad98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87f2e5a23751d995c2418b219d4fcec35be22e029cd6ba6d283fdd63379dad98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87f2e5a23751d995c2418b219d4fcec35be22e029cd6ba6d283fdd63379dad98", kill_on_drop: false }`
[INFO] [stdout] 87f2e5a23751d995c2418b219d4fcec35be22e029cd6ba6d283fdd63379dad98
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6b3e5d68e10299f6c6f3b3ddf4f6a0c61596a33ba615ee22ba2d46fb24e18b4f
[INFO] running `Command { std: "docker" "start" "-a" "6b3e5d68e10299f6c6f3b3ddf4f6a0c61596a33ba615ee22ba2d46fb24e18b4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling a17d22 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(entry_and_modify)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:157:27
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn timed(label: &str, f: &Fn()) {
[INFO] [stdout]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:277:28
[INFO] [stdout]     |
[INFO] [stdout] 277 | fn test_input<Grid>(read: &Fn(&[&str]) -> Grid) -> Grid {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&[&str]) -> Grid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:281:33
[INFO] [stdout]     |
[INFO] [stdout] 281 | fn challenge_input<Grid>(read: &Fn(&[&str]) -> Grid) -> Grid {
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&[&str]) -> Grid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `a17d22`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6b3e5d68e10299f6c6f3b3ddf4f6a0c61596a33ba615ee22ba2d46fb24e18b4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b3e5d68e10299f6c6f3b3ddf4f6a0c61596a33ba615ee22ba2d46fb24e18b4f", kill_on_drop: false }`
[INFO] [stdout] 6b3e5d68e10299f6c6f3b3ddf4f6a0c61596a33ba615ee22ba2d46fb24e18b4f