[INFO] fetching crate cortex 0.1.5...
[INFO] testing cortex-0.1.5 against 1.54.0 for beta-1.55-1
[INFO] extracting crate cortex 0.1.5 into /workspace/builds/worker-60/source
[INFO] validating manifest of crates.io crate cortex 0.1.5 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 cortex 0.1.5
[INFO] finished tweaking crates.io crate cortex 0.1.5
[INFO] tweaked toml for crates.io crate cortex 0.1.5 written to /workspace/builds/worker-60/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-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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] 847e40e133d563072276e45fbced4e523fd4b13cb36d00aac45b193856a64115
[INFO] running `Command { std: "docker" "start" "-a" "847e40e133d563072276e45fbced4e523fd4b13cb36d00aac45b193856a64115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "847e40e133d563072276e45fbced4e523fd4b13cb36d00aac45b193856a64115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "847e40e133d563072276e45fbced4e523fd4b13cb36d00aac45b193856a64115", kill_on_drop: false }`
[INFO] [stdout] 847e40e133d563072276e45fbced4e523fd4b13cb36d00aac45b193856a64115
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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] [stdout] 33056c9f7e429376b7043ebcf74b049acdd18be70e8861f358189268051ced99
[INFO] running `Command { std: "docker" "start" "-a" "33056c9f7e429376b7043ebcf74b049acdd18be70e8861f358189268051ced99", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cortex v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stdout]   --> src/cortex/mod.rs:24:33
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub struct Cortex<T: Debug, X: Observer<T>> {
[INFO] [stdout]    |                             - required by this bound in `Cortex`
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn register(&mut self, cortex: Box<Cortex<T, Self>>) { }
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
[INFO] [stdout]    |
[INFO] [stdout] help: consider further restricting `Self`
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn register(&mut self, cortex: Box<Cortex<T, Self>>) where Self: Sized { }
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider relaxing the implicit `Sized` restriction
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub struct Cortex<T: Debug, X: Observer<T> + ?Sized> {
[INFO] [stdout]    |                                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cortex`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "33056c9f7e429376b7043ebcf74b049acdd18be70e8861f358189268051ced99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33056c9f7e429376b7043ebcf74b049acdd18be70e8861f358189268051ced99", kill_on_drop: false }`
[INFO] [stdout] 33056c9f7e429376b7043ebcf74b049acdd18be70e8861f358189268051ced99
