[INFO] fetching crate rust_is_even 0.1.0...
[INFO] checking rust_is_even-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate rust_is_even 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rust_is_even 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust_is_even 0.1.0
[INFO] finished tweaking crates.io crate rust_is_even 0.1.0
[INFO] tweaked toml for crates.io crate rust_is_even 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate rust_is_even 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 12a88056643bdbb9f3cb87554e5520745407ef881ed5bb9bb7308235d1d66fec
[INFO] running `Command { std: "docker" "start" "-a" "12a88056643bdbb9f3cb87554e5520745407ef881ed5bb9bb7308235d1d66fec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12a88056643bdbb9f3cb87554e5520745407ef881ed5bb9bb7308235d1d66fec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12a88056643bdbb9f3cb87554e5520745407ef881ed5bb9bb7308235d1d66fec", kill_on_drop: false }`
[INFO] [stdout] 12a88056643bdbb9f3cb87554e5520745407ef881ed5bb9bb7308235d1d66fec
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--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] bcab9a06b30ee0cd2dddf6bfa9e5899a0982bc759b828ce3eb0c9326f178f573
[INFO] running `Command { std: "docker" "start" "-a" "bcab9a06b30ee0cd2dddf6bfa9e5899a0982bc759b828ce3eb0c9326f178f573", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling tokio v1.4.0
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking openssl-sys v0.9.61
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking openssl v0.10.33
[INFO] [stderr]     Checking native-tls v0.2.7
[INFO] [stderr]     Checking tokio-util v0.6.5
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.3.2
[INFO] [stderr]    Compiling pin-project-internal v1.0.6
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking pin-project v1.0.6
[INFO] [stderr]     Checking hyper v0.14.5
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking reqwest v0.11.2
[INFO] [stderr]     Checking rust_is_even v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `impl Future`
[INFO] [stdout]   --> src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         assert_eq!(is_even(1), false);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         impl Future
[INFO] [stdout]    |         bool
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `impl Future` doesn't implement `Debug`
[INFO] [stdout]   --> src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         assert_eq!(is_even(1), false);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `impl Future` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `impl Future`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `impl Future`
[INFO] [stdout]   --> src/lib.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         assert_eq!(is_even(2), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         impl Future
[INFO] [stdout]    |         bool
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `impl Future` doesn't implement `Debug`
[INFO] [stdout]   --> src/lib.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         assert_eq!(is_even(2), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `impl Future` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `impl Future`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `impl Future`
[INFO] [stdout]   --> src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         assert_eq!(is_even(42), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         impl Future
[INFO] [stdout]    |         bool
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `impl Future` doesn't implement `Debug`
[INFO] [stdout]   --> src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         assert_eq!(is_even(42), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `impl Future` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `impl Future`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `impl Future`
[INFO] [stdout]   --> src/lib.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         assert_eq!(is_even(43), false);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         impl Future
[INFO] [stdout]    |         bool
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `impl Future` doesn't implement `Debug`
[INFO] [stdout]   --> src/lib.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         assert_eq!(is_even(43), false);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `impl Future` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `impl Future`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0369.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_is_even` due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "bcab9a06b30ee0cd2dddf6bfa9e5899a0982bc759b828ce3eb0c9326f178f573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcab9a06b30ee0cd2dddf6bfa9e5899a0982bc759b828ce3eb0c9326f178f573", kill_on_drop: false }`
[INFO] [stdout] bcab9a06b30ee0cd2dddf6bfa9e5899a0982bc759b828ce3eb0c9326f178f573
