[INFO] fetching crate termrect 0.1.2...
[INFO] testing termrect-0.1.2 against 1.54.0 for beta-1.55-1
[INFO] extracting crate termrect 0.1.2 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate termrect 0.1.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate termrect 0.1.2
[INFO] finished tweaking crates.io crate termrect 0.1.2
[INFO] tweaked toml for crates.io crate termrect 0.1.2 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a9f29daf1f96f8eed44bdc2656e981780b109fcdc9f71334e53b7aca8fccf3b
[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" "0a9f29daf1f96f8eed44bdc2656e981780b109fcdc9f71334e53b7aca8fccf3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a9f29daf1f96f8eed44bdc2656e981780b109fcdc9f71334e53b7aca8fccf3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a9f29daf1f96f8eed44bdc2656e981780b109fcdc9f71334e53b7aca8fccf3b", kill_on_drop: false }`
[INFO] [stdout] 0a9f29daf1f96f8eed44bdc2656e981780b109fcdc9f71334e53b7aca8fccf3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 6a62be5b31d72fb50ffafb53f1c2d3b09d46a26497f8d32fbd09008deb137b8e
[INFO] running `Command { std: "docker" "start" "-a" "6a62be5b31d72fb50ffafb53f1c2d3b09d46a26497f8d32fbd09008deb137b8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling termrect v0.1.2 (/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(collections_range)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/style.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn termion_color(&self) -> Box<termion::color::Color> {
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn termion::color::Color`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning 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 `termrect`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6a62be5b31d72fb50ffafb53f1c2d3b09d46a26497f8d32fbd09008deb137b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a62be5b31d72fb50ffafb53f1c2d3b09d46a26497f8d32fbd09008deb137b8e", kill_on_drop: false }`
[INFO] [stdout] 6a62be5b31d72fb50ffafb53f1c2d3b09d46a26497f8d32fbd09008deb137b8e
