[INFO] fetching crate cellular_lib 0.1.1...
[INFO] testing cellular_lib-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate cellular_lib 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate cellular_lib 0.1.1 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 crates.io crate cellular_lib 0.1.1
[INFO] finished tweaking crates.io crate cellular_lib 0.1.1
[INFO] tweaked toml for crates.io crate cellular_lib 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `bench` profile
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] 60a50440508d7ba8c6c4f2188ef1c5a5c39d7899d02ed1e6529af94e2a66dce2
[INFO] running `Command { std: "docker" "start" "-a" "60a50440508d7ba8c6c4f2188ef1c5a5c39d7899d02ed1e6529af94e2a66dce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60a50440508d7ba8c6c4f2188ef1c5a5c39d7899d02ed1e6529af94e2a66dce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60a50440508d7ba8c6c4f2188ef1c5a5c39d7899d02ed1e6529af94e2a66dce2", kill_on_drop: false }`
[INFO] [stdout] 60a50440508d7ba8c6c4f2188ef1c5a5c39d7899d02ed1e6529af94e2a66dce2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9dd1d7c5f71e4a70249ad2c0469610b4a60b20152a6fb656cf1c2ecfbc2128b6
[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" "9dd1d7c5f71e4a70249ad2c0469610b4a60b20152a6fb656cf1c2ecfbc2128b6", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `bench` profile
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]    Compiling cellular_lib v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/cellular_automata/cellular_process.rs:49:31
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub type HaltFunc<CellType> = Fn(&GridDataType<CellType>) -> bool;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&GridDataType<CellType>) -> bool`
[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/cellular_automata/mod.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub type Printer = Fn(&str) -> ();
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&str) -> ()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/cellular_automata/mod.rs:18:19
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub type Reader = Fn() -> String;
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> String`
[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 `cellular_lib`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "9dd1d7c5f71e4a70249ad2c0469610b4a60b20152a6fb656cf1c2ecfbc2128b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dd1d7c5f71e4a70249ad2c0469610b4a60b20152a6fb656cf1c2ecfbc2128b6", kill_on_drop: false }`
[INFO] [stdout] 9dd1d7c5f71e4a70249ad2c0469610b4a60b20152a6fb656cf1c2ecfbc2128b6