[INFO] fetching crate imapctl 0.1.0...
[INFO] testing imapctl-0.1.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate imapctl 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate imapctl 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate imapctl 0.1.0
[INFO] tweaked toml for crates.io crate imapctl 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate imapctl 0.1.0 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 imapctl 0.1.0 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 toml_edit v0.23.4
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[INFO] [stderr]   Downloaded imap-proto v0.16.5
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[INFO] [stderr]   Downloaded stop-token v0.7.0
[INFO] [stderr]   Downloaded self_cell v1.2.0
[INFO] [stderr]   Downloaded async-imap v0.11.1
[INFO] [stderr]   Downloaded compression-core v0.4.28
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c
[INFO] running `Command { std: "docker" "start" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c", 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" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c" "/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" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c", 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" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
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[INFO] [stderr]    Compiling webpki-roots v1.0.2
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[INFO] [stderr]    Compiling tera v1.20.0
[INFO] [stderr]    Compiling async-imap v0.11.1
[INFO] [stderr]    Compiling rustls-webpki v0.103.4
[INFO] [stderr]    Compiling tokio-rustls v0.26.2
[INFO] [stderr]    Compiling imapctl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(string_remove_matches)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `imapctl` (bin "imapctl") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c", kill_on_drop: false }`
[INFO] [stdout] d4bedc82a4389caadaaddf2c2febbe0185fa3d34da1500064771098466398b5c
