[INFO] fetching crate empath 0.0.2...
[INFO] testing empath-0.0.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate empath 0.0.2 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate empath 0.0.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate empath 0.0.2
[INFO] finished tweaking crates.io crate empath 0.0.2
[INFO] tweaked toml for crates.io crate empath 0.0.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate empath 0.0.2 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-attributes v0.1.24
[INFO] [stderr]   Downloaded ctrlc v3.4.0
[INFO] [stderr]   Downloaded rustls-pemfile v1.0.2
[INFO] [stderr]   Downloaded iana-time-zone v0.1.56
[INFO] [stderr]   Downloaded async-lock v2.7.0
[INFO] [stderr]   Downloaded smol-timeout v0.6.0
[INFO] [stderr]   Downloaded once_cell v1.17.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded cbindgen v0.24.5
[INFO] [stderr]   Downloaded rustls v0.21.1
[INFO] [stderr]   Downloaded rustls-webpki v0.100.1
[INFO] [stderr]   Downloaded smol v1.3.0
[INFO] [stderr]   Downloaded ipconfig v0.3.1
[INFO] [stderr]   Downloaded async-net v1.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f264aaa337b393735d0de4205922882aa0d803ca4417de581297a711477ed494
[INFO] running `Command { std: "docker" "start" "-a" "f264aaa337b393735d0de4205922882aa0d803ca4417de581297a711477ed494", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f264aaa337b393735d0de4205922882aa0d803ca4417de581297a711477ed494", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f264aaa337b393735d0de4205922882aa0d803ca4417de581297a711477ed494", kill_on_drop: false }`
[INFO] [stdout] f264aaa337b393735d0de4205922882aa0d803ca4417de581297a711477ed494
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc340549ddfe49d58d97e0039ddcf4ce60c0e5cbaa756c59722458a903c49032
[INFO] running `Command { std: "docker" "start" "-a" "bc340549ddfe49d58d97e0039ddcf4ce60c0e5cbaa756c59722458a903c49032", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
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[INFO] [stderr]    Compiling cfg-if v1.0.0
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[INFO] [stderr]    Compiling unicode-ident v1.0.9
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[INFO] [stderr]    Compiling futures-core v0.3.28
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[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling futures-io v0.3.28
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]    Compiling concurrent-queue v2.2.0
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[INFO] [stderr]    Compiling parking v2.1.0
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[INFO] [stderr]    Compiling once_cell v1.17.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling futures-lite v1.13.0
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[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.163
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[INFO] [stderr]    Compiling enum-as-inner v0.5.1
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling url v2.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling encoding_rs v0.8.32
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling rustls v0.21.1
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling ipnet v2.7.2
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling nix v0.26.2
[INFO] [stderr]    Compiling trust-dns-proto v0.22.0
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling resolv-conf v0.7.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling charset v0.1.3
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling rustls-webpki v0.100.1
[INFO] [stderr]    Compiling async-executor v1.5.1
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling base64 v0.21.2
[INFO] [stderr]    Compiling iana-time-zone v0.1.56
[INFO] [stderr]    Compiling pin-project-lite v0.1.12
[INFO] [stderr]    Compiling quoted_printable v0.4.8
[INFO] [stderr]    Compiling smol-timeout v0.6.0
[INFO] [stderr]    Compiling rustls-pemfile v1.0.2
[INFO] [stderr]    Compiling mailparse v0.14.0
[INFO] [stderr]    Compiling chrono v0.4.26
[INFO] [stderr]    Compiling trust-dns-resolver v0.22.0
[INFO] [stderr]    Compiling smol v1.3.0
[INFO] [stderr]    Compiling ctrlc v3.4.0
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling fern v0.6.2
[INFO] [stderr]    Compiling libloading v0.8.0
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling empath v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `empath` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bc340549ddfe49d58d97e0039ddcf4ce60c0e5cbaa756c59722458a903c49032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc340549ddfe49d58d97e0039ddcf4ce60c0e5cbaa756c59722458a903c49032", kill_on_drop: false }`
[INFO] [stdout] bc340549ddfe49d58d97e0039ddcf4ce60c0e5cbaa756c59722458a903c49032
