[INFO] updating cached repository https://github.com/overdrivenpotato/ui-experiments
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 00bee4df583a1959f94b7c802a01d5c61e0e4fa9
[INFO] testing overdrivenpotato/ui-experiments against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foverdrivenpotato%2Fui-experiments" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/overdrivenpotato/ui-experiments on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/overdrivenpotato/ui-experiments
[INFO] finished tweaking git repo https://github.com/overdrivenpotato/ui-experiments
[INFO] tweaked toml for git repo https://github.com/overdrivenpotato/ui-experiments written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/overdrivenpotato/ui-experiments already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 978374cfe0d205735fed65224d7b5e6a1315c49fce9974a1a7d9a12713c2da57
[INFO] running `"docker" "start" "-a" "978374cfe0d205735fed65224d7b5e6a1315c49fce9974a1a7d9a12713c2da57"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde_json v1.0.9
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]    Compiling blocks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[macro_use] extern crate serde_derive;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #[macro_use] extern crate lazy_static;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Length`
[INFO] [stderr]  --> src/ui/size.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::{Length, Unit};
[INFO] [stderr]   |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::position::Position`
[INFO] [stderr]   --> src/ui/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use self::position::Position;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::size::Size`
[INFO] [stderr]   --> src/ui/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use self::size::Size;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::content::Content`
[INFO] [stderr]   --> src/ui/mod.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use self::content::Content;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::spacing::Spacing`
[INFO] [stderr]   --> src/ui/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use self::spacing::Spacing;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::border::Border`
[INFO] [stderr]   --> src/ui/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use self::border::Border;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::shadow::Shadow`
[INFO] [stderr]   --> src/ui/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use self::shadow::Shadow;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::render::Render`
[INFO] [stderr]   --> src/ui/mod.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 | use self::render::Render;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::reactive::Reactive`
[INFO] [stderr]   --> src/ui/mod.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | use self::reactive::Reactive;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::font::Font`
[INFO] [stderr]   --> src/ui/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | use self::font::Font;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/reactor.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 |     update: Box<Update<Message = T>>,
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = T>`
[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/reactor.rs:11:25
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn wrap(update: Box<Update<Message = T>>) -> Self {
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reactor.rs:30:28
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn clone(&self) -> Box<Update<Message = U>> {
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = U>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reactor.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |     update: Box<Update<Message = M>>,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:24:28
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn clone(&self) -> Box<Update<Message = Self::Message>>;
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = Self::Message>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:27:24
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl<M> Update for Box<Update<Message = M>> where M: Send + 'static {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:34:28
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn clone(&self) -> Box<Update<Message = Self::Message>> {
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Update<Message = Self::Message>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `blocks`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "978374cfe0d205735fed65224d7b5e6a1315c49fce9974a1a7d9a12713c2da57"`
[INFO] running `"docker" "rm" "-f" "978374cfe0d205735fed65224d7b5e6a1315c49fce9974a1a7d9a12713c2da57"`
[INFO] [stdout] 978374cfe0d205735fed65224d7b5e6a1315c49fce9974a1a7d9a12713c2da57