[INFO] fetching crate metatype 0.2.2...
[INFO] testing metatype-0.2.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate metatype 0.2.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate metatype 0.2.2
[INFO] finished tweaking crates.io crate metatype 0.2.2
[INFO] tweaked toml for crates.io crate metatype 0.2.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate metatype 0.2.2 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 metatype 0.2.2 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 66ab60f84b089bd7ed13e921a9d7aceaecb36cce9ee2c096d44595057d595780
[INFO] running `Command { std: "docker" "start" "-a" "66ab60f84b089bd7ed13e921a9d7aceaecb36cce9ee2c096d44595057d595780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66ab60f84b089bd7ed13e921a9d7aceaecb36cce9ee2c096d44595057d595780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66ab60f84b089bd7ed13e921a9d7aceaecb36cce9ee2c096d44595057d595780", kill_on_drop: false }`
[INFO] [stdout] 66ab60f84b089bd7ed13e921a9d7aceaecb36cce9ee2c096d44595057d595780
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4f0b497eff9eafa9604e8d266043377173a04a5fb86e3292fd8ac99e99f92b88
[INFO] running `Command { std: "docker" "start" "-a" "4f0b497eff9eafa9604e8d266043377173a04a5fb86e3292fd8ac99e99f92b88", kill_on_drop: false }`
[INFO] [stderr]    Compiling metatype v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(arbitrary_self_types_pointers)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(ptr_metadata)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | #![feature(specialization)]
[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 `metatype` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "4f0b497eff9eafa9604e8d266043377173a04a5fb86e3292fd8ac99e99f92b88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f0b497eff9eafa9604e8d266043377173a04a5fb86e3292fd8ac99e99f92b88", kill_on_drop: false }`
[INFO] [stdout] 4f0b497eff9eafa9604e8d266043377173a04a5fb86e3292fd8ac99e99f92b88
