[INFO] fetching crate subito 0.1.1...
[INFO] testing subito-0.1.1 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate subito 0.1.1 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate subito 0.1.1
[INFO] finished tweaking crates.io crate subito 0.1.1
[INFO] tweaked toml for crates.io crate subito 0.1.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate subito 0.1.1 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate subito 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505
[INFO] running `Command { std: "docker" "start" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nothing-0.1.11/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | #![feature(derive_default_enum)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `derive_default_enum` has been stable since `1.62.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Probably<Infallible>: Residual<T>` is not satisfied
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nothing-0.1.11/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |     type Residual = Probably<std::convert::Infallible>;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]    |
[INFO] [stdout] help: the nightly-only, unstable trait `Residual<T>` is not implemented for `Probably<Infallible>`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nothing-0.1.11/lib.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub enum Probably<T> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: the following other types implement trait `Residual<O>`
[INFO] [stdout]   --> /rustc/dfb0accb7f508ae8be965d8629557221c889dd98/library/core/src/option.rs:2901:0
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Option<Infallible>`
[INFO] [stdout]   --> /rustc/dfb0accb7f508ae8be965d8629557221c889dd98/library/core/src/result.rs:2209:0
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Result<Infallible, E>`
[INFO] [stdout] note: required by a bound in `std::ops::Try::Residual`
[INFO] [stdout]   --> /rustc/dfb0accb7f508ae8be965d8629557221c889dd98/library/core/src/ops/try_trait.rs:160:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nothing` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505", kill_on_drop: false }`
[INFO] [stdout] 9c3698e74d1ea72998b8cb6d551f9c46c8d756811488d255365309fe74e88505
