[INFO] cloning repository https://github.com/wefcdse/websocket_control
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wefcdse/websocket_control" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwefcdse%2Fwebsocket_control", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwefcdse%2Fwebsocket_control'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7269870de19ffe538af71f5dfcb7eaf2b8c2d1ee
[INFO] testing wefcdse/websocket_control against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwefcdse%2Fwebsocket_control" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wefcdse/websocket_control
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/wefcdse/websocket_control
[INFO] tweaked toml for git repo https://github.com/wefcdse/websocket_control written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wefcdse/websocket_control on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wefcdse/websocket_control 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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] dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190
[INFO] running `Command { std: "docker" "start" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190", 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" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190", 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" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
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[INFO] [stderr]    Compiling computercraft_websocket_control v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 47.21s
[INFO] running `Command { std: "docker" "inspect" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190", 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" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.20
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[INFO] [stderr]    Compiling tungstenite v0.20.1
[INFO] [stderr]    Compiling tower v0.4.13
[INFO] [stderr]    Compiling hyper v0.14.27
[INFO] [stderr]    Compiling tokio-tungstenite v0.20.1
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[INFO] [stderr]    Compiling regex v1.10.2
[INFO] [stderr]    Compiling env_logger v0.10.0
[INFO] [stderr]    Compiling computercraft_websocket_control v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]   --> examples/unused.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     .collect::<Result<_, _>>()?;
[INFO] [stdout]    |      -------   ^^^^^^^^^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]    |      |
[INFO] [stdout]    |      required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout] help: the trait `FromIterator<Result<T, E>>` is conditionally implemented for `Result<V, E>`
[INFO] [stdout]   --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/core/src/result.rs:2114:14
[INFO] [stdout]    |
[INFO] [stdout]    = note: unsatisfied requirement introduced here: `!: FromIterator<()>`
[INFO] [stdout]    = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]    = help: you might have intended to use the type `()` here instead
[INFO] [stdout]    = note: required for `Result<!, Errors>` to implement `FromIterator<Result<(), Errors>>`
[INFO] [stdout] note: required by a bound in `std::iter::Iterator::collect`
[INFO] [stdout]   --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/core/src/iter/traits/iterator.rs:2087:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `computercraft_websocket_control` (example "unused") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190", kill_on_drop: false }`
[INFO] [stdout] dac6a1ac2b21b8807414a70765e8ac15d14b5966aca868d1e6d81ea73655f190
