[INFO] fetching crate permutation-generator 0.1.1...
[INFO] testing permutation-generator-0.1.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate permutation-generator 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate permutation-generator 0.1.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate permutation-generator 0.1.1
[INFO] finished tweaking crates.io crate permutation-generator 0.1.1
[INFO] tweaked toml for crates.io crate permutation-generator 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-index v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b618f674a58a38596eea4c2c27b08740d3cbb5f81aab91fe181b5f7d04b77a8c
[INFO] running `Command { std: "docker" "start" "-a" "b618f674a58a38596eea4c2c27b08740d3cbb5f81aab91fe181b5f7d04b77a8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b618f674a58a38596eea4c2c27b08740d3cbb5f81aab91fe181b5f7d04b77a8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b618f674a58a38596eea4c2c27b08740d3cbb5f81aab91fe181b5f7d04b77a8c", kill_on_drop: false }`
[INFO] [stdout] b618f674a58a38596eea4c2c27b08740d3cbb5f81aab91fe181b5f7d04b77a8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 72b4ed12435065bae462e4a005cce335e41a289db310fe233618e501d0fe3ee3
[INFO] running `Command { std: "docker" "start" "-a" "72b4ed12435065bae462e4a005cce335e41a289db310fe233618e501d0fe3ee3", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit-index v0.2.0
[INFO] [stderr]    Compiling permutation-generator v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(min_type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of full type_alias_impl_trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/permutation_generator/permutation_generator_16.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     type Item = impl Iterator<Item = u8>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/permutation_generator/permutation_generator_32.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |     type Item = impl Iterator<Item = u8>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/permutation_generator/permutation_generator_8.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     type Item = impl Iterator<Item = u8>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `permutation-generator` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "72b4ed12435065bae462e4a005cce335e41a289db310fe233618e501d0fe3ee3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72b4ed12435065bae462e4a005cce335e41a289db310fe233618e501d0fe3ee3", kill_on_drop: false }`
[INFO] [stdout] 72b4ed12435065bae462e4a005cce335e41a289db310fe233618e501d0fe3ee3