[INFO] fetching crate permutation-generator 0.1.1...
[INFO] testing permutation-generator-0.1.1 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate permutation-generator 0.1.1 into /workspace/builds/worker-37/source
[INFO] validating manifest of crates.io crate permutation-generator 0.1.1 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-37/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4127ad56948166b61d98f0e198164a6ae95e60c8b6c4bf11bb1c5a0bd281097f
[INFO] running `Command { std: "docker" "start" "-a" "4127ad56948166b61d98f0e198164a6ae95e60c8b6c4bf11bb1c5a0bd281097f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4127ad56948166b61d98f0e198164a6ae95e60c8b6c4bf11bb1c5a0bd281097f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4127ad56948166b61d98f0e198164a6ae95e60c8b6c4bf11bb1c5a0bd281097f", kill_on_drop: false }`
[INFO] [stdout] 4127ad56948166b61d98f0e198164a6ae95e60c8b6c4bf11bb1c5a0bd281097f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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=forbid" "-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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cfeadf7cf30e7310554744cff7497ee363435eb3256c928fbd91b8ee2829b564
[INFO] running `Command { std: "docker" "start" "-a" "cfeadf7cf30e7310554744cff7497ee363435eb3256c928fbd91b8ee2829b564", 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]    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
[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]    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
[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]    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "cfeadf7cf30e7310554744cff7497ee363435eb3256c928fbd91b8ee2829b564", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfeadf7cf30e7310554744cff7497ee363435eb3256c928fbd91b8ee2829b564", kill_on_drop: false }`
[INFO] [stdout] cfeadf7cf30e7310554744cff7497ee363435eb3256c928fbd91b8ee2829b564