[INFO] fetching crate bitcoin-version 0.1.16-alpha.0...
[INFO] documenting bitcoin-version-0.1.16-alpha.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate bitcoin-version 0.1.16-alpha.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate bitcoin-version 0.1.16-alpha.0 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 bitcoin-version 0.1.16-alpha.0
[INFO] finished tweaking crates.io crate bitcoin-version 0.1.16-alpha.0
[INFO] tweaked toml for crates.io crate bitcoin-version 0.1.16-alpha.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 00d859cd1615b31262de2121df570c0c4dc307ae52ec4a72536f536dc4b4efe0
[INFO] running `Command { std: "docker" "start" "-a" "00d859cd1615b31262de2121df570c0c4dc307ae52ec4a72536f536dc4b4efe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00d859cd1615b31262de2121df570c0c4dc307ae52ec4a72536f536dc4b4efe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00d859cd1615b31262de2121df570c0c4dc307ae52ec4a72536f536dc4b4efe0", kill_on_drop: false }`
[INFO] [stdout] 00d859cd1615b31262de2121df570c0c4dc307ae52ec4a72536f536dc4b4efe0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee6678241dfb1454eb99d14f0a258b419be2b9f6a4de9b14d3327cfab293a07a
[INFO] running `Command { std: "docker" "start" "-a" "ee6678241dfb1454eb99d14f0a258b419be2b9f6a4de9b14d3327cfab293a07a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling qttypes v0.2.11
[INFO] [stderr]    Compiling cpp_macros v0.5.9
[INFO] [stderr]    Compiling qmetaobject v0.2.10
[INFO] [stderr]    Compiling libevent-sys v0.2.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking crossbeam-queue v0.3.10
[INFO] [stderr]     Checking memoffset v0.6.5
[INFO] [stderr]     Checking poison v0.1.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking quanta v0.9.3
[INFO] [stderr]     Checking priority-queue v1.3.2
[INFO] [stderr]     Checking sqlite3 v0.24.0
[INFO] [stderr]     Checking sqlite v0.25.3
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking shared-mutex v0.3.1
[INFO] [stderr]     Checking crossbeam v0.8.3
[INFO] [stderr]     Checking libc-stdhandle v0.1.0
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking errno v0.2.8
[INFO] [stderr]     Checking pnet_sys v0.31.0
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking comparator v0.3.0
[INFO] [stderr]     Checking atomic-take v1.1.0
[INFO] [stderr]     Checking atomic v0.5.3
[INFO] [stderr]     Checking time-point v0.1.1
[INFO] [stderr]     Checking multiset v0.0.5
[INFO] [stderr]     Checking bitset v0.1.2
[INFO] [stderr]     Checking atomic_float v0.1.0
[INFO] [stderr]     Checking float-ord v0.3.2
[INFO] [stderr]     Checking const-default v1.0.0
[INFO] [stderr]     Checking integer-encoding v3.0.4
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling cpp v0.5.9
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling qt_macros v0.1.1
[INFO] [stderr]    Compiling qmetaobject_impl v0.2.10
[INFO] [stderr]    Compiling phf_macros v0.10.0
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling try-catch v0.2.2
[INFO] [stderr]    Compiling delegate v0.7.0
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking serde-big-array v0.4.1
[INFO] [stderr]     Checking libevent v0.1.0
[INFO] [stderr]     Checking multimap v0.8.3
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling phf v0.10.1
[INFO] [stderr]    Compiling modular-bitfield v0.11.2
[INFO] [stderr]     Checking time v0.3.31
[INFO] [stderr]    Compiling ritual_common v0.4.0
[INFO] [stderr]    Compiling qt_ritual_common v0.4.0
[INFO] [stderr]    Compiling ritual_build v0.4.0
[INFO] [stderr]    Compiling qt_ritual_build v0.5.0
[INFO] [stderr]    Compiling qt_core v0.5.0
[INFO] [stderr]    Compiling qt_gui v0.5.0
[INFO] [stderr]     Checking bitcoin-imports v0.1.16-alpha.0
[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-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `generic_associated_types` has been stable since `1.65.0` and no longer requires an attribute to enable
[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-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(exact_size_is_empty)]
[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-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(exact_size_is_empty)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bitcoin-imports` (lib) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ee6678241dfb1454eb99d14f0a258b419be2b9f6a4de9b14d3327cfab293a07a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee6678241dfb1454eb99d14f0a258b419be2b9f6a4de9b14d3327cfab293a07a", kill_on_drop: false }`
[INFO] [stdout] ee6678241dfb1454eb99d14f0a258b419be2b9f6a4de9b14d3327cfab293a07a
[INFO] documenting bitcoin-version-0.1.16-alpha.0 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate bitcoin-version 0.1.16-alpha.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate bitcoin-version 0.1.16-alpha.0 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitcoin-version 0.1.16-alpha.0
[INFO] finished tweaking crates.io crate bitcoin-version 0.1.16-alpha.0
[INFO] tweaked toml for crates.io crate bitcoin-version 0.1.16-alpha.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8272d386c119b8e57250c9d81575418f093b61dfc7448d019138c55dd6adf413
[INFO] running `Command { std: "docker" "start" "-a" "8272d386c119b8e57250c9d81575418f093b61dfc7448d019138c55dd6adf413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8272d386c119b8e57250c9d81575418f093b61dfc7448d019138c55dd6adf413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8272d386c119b8e57250c9d81575418f093b61dfc7448d019138c55dd6adf413", kill_on_drop: false }`
[INFO] [stdout] 8272d386c119b8e57250c9d81575418f093b61dfc7448d019138c55dd6adf413
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42ccf3ac94c80cd04193d17617f5d51fc4d36152046225bfa455e34464afe1c3
[INFO] running `Command { std: "docker" "start" "-a" "42ccf3ac94c80cd04193d17617f5d51fc4d36152046225bfa455e34464afe1c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling qttypes v0.2.11
[INFO] [stderr]    Compiling cpp_macros v0.5.9
[INFO] [stderr]    Compiling qmetaobject v0.2.10
[INFO] [stderr]    Compiling libevent-sys v0.2.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking indexmap v1.9.3
[INFO] [stderr]     Checking raw-cpuid v10.7.0
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.10
[INFO] [stderr]     Checking crossbeam-queue v0.3.10
[INFO] [stderr]     Checking memoffset v0.6.5
[INFO] [stderr]     Checking poison v0.1.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking shared-mutex v0.3.1
[INFO] [stderr]     Checking sqlite3 v0.24.0
[INFO] [stderr]     Checking sqlite v0.25.3
[INFO] [stderr]     Checking libc-stdhandle v0.1.0
[INFO] [stderr]     Checking num-bigint v0.4.4
[INFO] [stderr]     Checking num-iter v0.1.43
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking crossbeam v0.8.3
[INFO] [stderr]     Checking pnet_sys v0.31.0
[INFO] [stderr]     Checking priority-queue v1.3.2
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking errno v0.2.8
[INFO] [stderr]     Checking atomic v0.5.3
[INFO] [stderr]     Checking atomic_float v0.1.0
[INFO] [stderr]     Checking comparator v0.3.0
[INFO] [stderr]     Checking integer-encoding v3.0.4
[INFO] [stderr]     Checking time-point v0.1.1
[INFO] [stderr]     Checking const-default v1.0.0
[INFO] [stderr]     Checking atomic-take v1.1.0
[INFO] [stderr]     Checking multiset v0.0.5
[INFO] [stderr]     Checking float-ord v0.3.2
[INFO] [stderr]     Checking bitset v0.1.2
[INFO] [stderr]     Checking quanta v0.9.3
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling cpp v0.5.9
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling qt_macros v0.1.1
[INFO] [stderr]    Compiling phf_macros v0.10.0
[INFO] [stderr]    Compiling qmetaobject_impl v0.2.10
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling delegate v0.7.0
[INFO] [stderr]    Compiling try-catch v0.2.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling libevent v0.1.0
[INFO] [stderr]    Compiling phf v0.10.1
[INFO] [stderr]    Compiling modular-bitfield v0.11.2
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking serde-big-array v0.4.1
[INFO] [stderr]     Checking multimap v0.8.3
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling ritual_common v0.4.0
[INFO] [stderr]    Compiling time v0.3.31
[INFO] [stderr]    Compiling qt_ritual_common v0.4.0
[INFO] [stderr]    Compiling ritual_build v0.4.0
[INFO] [stderr]    Compiling qt_ritual_build v0.5.0
[INFO] [stderr]    Compiling qt_core v0.5.0
[INFO] [stderr]    Compiling qt_gui v0.5.0
[INFO] [stderr]     Checking bitcoin-imports v0.1.16-alpha.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `generic_associated_types` has been stable since `1.65.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(exact_size_is_empty)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bitcoin-imports-0.1.16-alpha.0/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(exact_size_is_empty)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bitcoin-imports` (lib) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "42ccf3ac94c80cd04193d17617f5d51fc4d36152046225bfa455e34464afe1c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42ccf3ac94c80cd04193d17617f5d51fc4d36152046225bfa455e34464afe1c3", kill_on_drop: false }`
[INFO] [stdout] 42ccf3ac94c80cd04193d17617f5d51fc4d36152046225bfa455e34464afe1c3
