[INFO] fetching crate world-count 0.1.4...
[INFO] testing world-count-0.1.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate world-count 0.1.4 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate world-count 0.1.4
[INFO] finished tweaking crates.io crate world-count 0.1.4
[INFO] tweaked toml for crates.io crate world-count 0.1.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate world-count 0.1.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate world-count 0.1.4 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded aoko v0.3.0-alpha.24
[INFO] [stderr]   Downloaded minstant v0.1.2
[INFO] [stderr]   Downloaded clap v4.2.7
[INFO] [stderr]   Downloaded clap_builder v4.2.7
[INFO] [stderr]   Downloaded rustix v0.37.19
[INFO] [stderr]   Downloaded tokio v1.28.0
[INFO] [stderr]   Downloaded linux-raw-sys v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36b4d7acd4e823c9e556e99d6554dbe83548458750541fa0af156032b5b8ec91
[INFO] running `Command { std: "docker" "start" "-a" "36b4d7acd4e823c9e556e99d6554dbe83548458750541fa0af156032b5b8ec91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36b4d7acd4e823c9e556e99d6554dbe83548458750541fa0af156032b5b8ec91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36b4d7acd4e823c9e556e99d6554dbe83548458750541fa0af156032b5b8ec91", kill_on_drop: false }`
[INFO] [stdout] 36b4d7acd4e823c9e556e99d6554dbe83548458750541fa0af156032b5b8ec91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0dcf9378e2bea690d890f9c9c742d8818b3b4208e16462ea0d0a3b50716d81f
[INFO] running `Command { std: "docker" "start" "-a" "c0dcf9378e2bea690d890f9c9c742d8818b3b4208e16462ea0d0a3b50716d81f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling linux-raw-sys v0.3.7
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling tokio v1.28.0
[INFO] [stderr]    Compiling clap_lex v0.4.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling no-std-compat v0.4.1
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling socket2 v0.4.9
[INFO] [stderr]    Compiling mio v0.8.6
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling is-terminal v0.4.7
[INFO] [stderr]    Compiling anstream v0.3.2
[INFO] [stderr]    Compiling clap_builder v4.2.7
[INFO] [stderr]    Compiling ctor v0.1.26
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling clap_derive v4.2.0
[INFO] [stderr]    Compiling minstant v0.1.2
[INFO] [stderr]    Compiling aoko v0.3.0-alpha.24
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/aoko-0.3.0-alpha.24/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(impl_trait_in_fn_trait_return)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/aoko-0.3.0-alpha.24/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `return_position_impl_trait_in_trait` has been stable since `1.75.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoko` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c0dcf9378e2bea690d890f9c9c742d8818b3b4208e16462ea0d0a3b50716d81f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0dcf9378e2bea690d890f9c9c742d8818b3b4208e16462ea0d0a3b50716d81f", kill_on_drop: false }`
[INFO] [stdout] c0dcf9378e2bea690d890f9c9c742d8818b3b4208e16462ea0d0a3b50716d81f