[INFO] fetching crate generic-str 0.3.1...
[INFO] testing generic-str-0.3.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate generic-str 0.3.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate generic-str 0.3.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate generic-str 0.3.1
[INFO] finished tweaking crates.io crate generic-str 0.3.1
[INFO] tweaked toml for crates.io crate generic-str 0.3.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd5d8d73a4a4068459ad9657a45318e068433a650c882000bd4ff1c4699521bc
[INFO] running `Command { std: "docker" "start" "-a" "bd5d8d73a4a4068459ad9657a45318e068433a650c882000bd4ff1c4699521bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd5d8d73a4a4068459ad9657a45318e068433a650c882000bd4ff1c4699521bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd5d8d73a4a4068459ad9657a45318e068433a650c882000bd4ff1c4699521bc", kill_on_drop: false }`
[INFO] [stdout] bd5d8d73a4a4068459ad9657a45318e068433a650c882000bd4ff1c4699521bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 293cfbbb91d2fc27a9d81c5bc07c6fb110bb7230ea174077f243bda96d217b0c
[INFO] running `Command { std: "docker" "start" "-a" "293cfbbb91d2fc27a9d81c5bc07c6fb110bb7230ea174077f243bda96d217b0c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cl-generic-vec v0.3.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cl-generic-vec-0.3.4/src/lib.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | /     feature(
[INFO] [stdout] 5  | |         trusted_len,
[INFO] [stdout] 6  | |         min_specialization,
[INFO] [stdout] 7  | |         exact_size_is_empty,
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | |         ptr_metadata,
[INFO] [stdout] 14 | |     )
[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/github.com-1ecc6299db9ec823/cl-generic-vec-0.3.4/src/lib.rs:16:58
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(all(feature = "nightly", feature = "alloc"), feature(new_uninit))]
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `cl-generic-vec` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "293cfbbb91d2fc27a9d81c5bc07c6fb110bb7230ea174077f243bda96d217b0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "293cfbbb91d2fc27a9d81c5bc07c6fb110bb7230ea174077f243bda96d217b0c", kill_on_drop: false }`
[INFO] [stdout] 293cfbbb91d2fc27a9d81c5bc07c6fb110bb7230ea174077f243bda96d217b0c