[INFO] fetching crate nothing 0.1.12...
[INFO] testing nothing-0.1.12 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate nothing 0.1.12 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate nothing 0.1.12
[INFO] finished tweaking crates.io crate nothing 0.1.12
[INFO] tweaked toml for crates.io crate nothing 0.1.12 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nothing 0.1.12 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 nothing 0.1.12 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
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded is-macro v0.2.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.70
[INFO] [stderr]   Downloaded pmutil v0.5.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784
[INFO] running `Command { std: "docker" "start" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784", 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" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784" "/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" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784", 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" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling pmutil v0.5.3
[INFO] [stderr]    Compiling is-macro v0.2.2
[INFO] [stderr]    Compiling nothing v0.1.12 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(try_trait_v2)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Probably<Infallible>: Residual<T>` is not satisfied
[INFO] [stdout]   --> lib.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |     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]   --> lib.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout]  9 | 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] [stderr] error: could not compile `nothing` (lib) due to 2 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784", kill_on_drop: false }`
[INFO] [stdout] fc5f764159115e5360c34cf3c13d9ed7900c1c257a26fad734410cc9629f0784
