[INFO] fetching crate prust_core 0.1.3...
[INFO] testing prust_core-0.1.3 against 1.59.0 for beta-1.60-1
[INFO] extracting crate prust_core 0.1.3 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate prust_core 0.1.3 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 prust_core 0.1.3
[INFO] finished tweaking crates.io crate prust_core 0.1.3
[INFO] tweaked toml for crates.io crate prust_core 0.1.3 written to /workspace/builds/worker-5/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 2a8f77471a997f9894618e8f8eff561d68fe65e3e3f36ab27e89771777f36672
[INFO] running `Command { std: "docker" "start" "-a" "2a8f77471a997f9894618e8f8eff561d68fe65e3e3f36ab27e89771777f36672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a8f77471a997f9894618e8f8eff561d68fe65e3e3f36ab27e89771777f36672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a8f77471a997f9894618e8f8eff561d68fe65e3e3f36ab27e89771777f36672", kill_on_drop: false }`
[INFO] [stdout] 2a8f77471a997f9894618e8f8eff561d68fe65e3e3f36ab27e89771777f36672
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 832596aaffaf014b8113aaead49a438df44e5dbad5d6994f8093c50e077b89e5
[INFO] running `Command { std: "docker" "start" "-a" "832596aaffaf014b8113aaead49a438df44e5dbad5d6994f8093c50e077b89e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling prust_core v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `core::option`
[INFO] [stdout]   --> src/error.rs:27:40
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl core::convert::From<core::option::NoneError> for Error {
[INFO] [stdout]    |                                        ^^^^^^^^^ not found in `core::option`
[INFO] [stdout]    |
[INFO] [stdout] help: there is an enum variant `crate::Error::NoneError`; try using the variant's enum
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl core::convert::From<crate::Error> for Error {
[INFO] [stdout]    |                          ~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `core::option`
[INFO] [stdout]   --> src/error.rs:28:30
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn from(_: core::option::NoneError) -> Self {
[INFO] [stdout]    |                              ^^^^^^^^^ not found in `core::option`
[INFO] [stdout]    |
[INFO] [stdout] help: there is an enum variant `crate::Error::NoneError`; try using the variant's enum
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn from(_: crate::Error) -> Self {
[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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allow_internal_unstable)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait)]
[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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(arbitrary_enum_discriminant)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prust_core` due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "832596aaffaf014b8113aaead49a438df44e5dbad5d6994f8093c50e077b89e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "832596aaffaf014b8113aaead49a438df44e5dbad5d6994f8093c50e077b89e5", kill_on_drop: false }`
[INFO] [stdout] 832596aaffaf014b8113aaead49a438df44e5dbad5d6994f8093c50e077b89e5