[INFO] fetching crate prust_test 0.1.2...
[INFO] testing prust_test-0.1.2 against 1.59.0 for beta-1.60-1
[INFO] extracting crate prust_test 0.1.2 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate prust_test 0.1.2 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] removed /workspace/builds/worker-21/source/.cargo/config.toml
[INFO] started tweaking crates.io crate prust_test 0.1.2
[INFO] finished tweaking crates.io crate prust_test 0.1.2
[INFO] tweaked toml for crates.io crate prust_test 0.1.2 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate crates.io crate prust_test 0.1.2 already has a lockfile, it will not be regenerated
[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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 7af265afa352a27244fb7449e129f8cc41a38d366a01f38e119cd3ab62f47d78
[INFO] running `Command { std: "docker" "start" "-a" "7af265afa352a27244fb7449e129f8cc41a38d366a01f38e119cd3ab62f47d78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7af265afa352a27244fb7449e129f8cc41a38d366a01f38e119cd3ab62f47d78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7af265afa352a27244fb7449e129f8cc41a38d366a01f38e119cd3ab62f47d78", kill_on_drop: false }`
[INFO] [stdout] 7af265afa352a27244fb7449e129f8cc41a38d366a01f38e119cd3ab62f47d78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 99d1eed9500165aa79ab91a1ed8a90208398b04bbf6ee30feaeb91e7b151a96e
[INFO] running `Command { std: "docker" "start" "-a" "99d1eed9500165aa79ab91a1ed8a90208398b04bbf6ee30feaeb91e7b151a96e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling text_io v0.1.8
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling prust_core v0.1.2
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling libudev v0.2.0
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `core::option`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prust_core-0.1.2/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]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prust_core-0.1.2/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]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prust_core-0.1.2/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]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prust_core-0.1.2/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]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prust_core-0.1.2/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(arbitrary_enum_discriminant)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling dirs-next v1.0.2
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prust_core` due to 6 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0412, E0554.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "99d1eed9500165aa79ab91a1ed8a90208398b04bbf6ee30feaeb91e7b151a96e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99d1eed9500165aa79ab91a1ed8a90208398b04bbf6ee30feaeb91e7b151a96e", kill_on_drop: false }`
[INFO] [stdout] 99d1eed9500165aa79ab91a1ed8a90208398b04bbf6ee30feaeb91e7b151a96e