[INFO] fetching crate prust_core 0.1.3...
[INFO] testing prust_core-0.1.3 against 1.75.0 for beta-1.76-1
[INFO] extracting crate prust_core 0.1.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate prust_core 0.1.3 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc6fef65eb50fc965e384767555d36c6c980112358f795248a1925befb23f730
[INFO] running `Command { std: "docker" "start" "-a" "bc6fef65eb50fc965e384767555d36c6c980112358f795248a1925befb23f730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc6fef65eb50fc965e384767555d36c6c980112358f795248a1925befb23f730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc6fef65eb50fc965e384767555d36c6c980112358f795248a1925befb23f730", kill_on_drop: false }`
[INFO] [stdout] bc6fef65eb50fc965e384767555d36c6c980112358f795248a1925befb23f730
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5d6d45cfc327a98ff79c54ce0b9c524b05d23d8e3663ebdab824306e8170092
[INFO] running `Command { std: "docker" "start" "-a" "d5d6d45cfc327a98ff79c54ce0b9c524b05d23d8e3663ebdab824306e8170092", kill_on_drop: false }`
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling arrayref v0.3.7
[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]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `arbitrary_enum_discriminant` has been stable since `1.66.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `allow_internal_unstable` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allow_internal_unstable)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `arbitrary_enum_discriminant` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(arbitrary_enum_discriminant)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `try_trait`
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prust_core` (lib) due to 8 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d5d6d45cfc327a98ff79c54ce0b9c524b05d23d8e3663ebdab824306e8170092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5d6d45cfc327a98ff79c54ce0b9c524b05d23d8e3663ebdab824306e8170092", kill_on_drop: false }`
[INFO] [stdout] d5d6d45cfc327a98ff79c54ce0b9c524b05d23d8e3663ebdab824306e8170092
