[INFO] fetching crate fcplug 0.4.3...
[INFO] testing fcplug-0.4.3 against 1.75.0 for beta-1.76-1
[INFO] extracting crate fcplug 0.4.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate fcplug 0.4.3 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 fcplug 0.4.3
[INFO] finished tweaking crates.io crate fcplug 0.4.3
[INFO] tweaked toml for crates.io crate fcplug 0.4.3 written to /workspace/builds/worker-4-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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded defer-lite v1.0.0
[INFO] [stderr]   Downloaded tracing-appender v0.2.3
[INFO] [stderr]   Downloaded faststr v0.2.16
[INFO] [stderr]   Downloaded pilota v0.7.0
[INFO] [stderr]   Downloaded linkedbytes v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3736e9fc755e41881d28404116acc44e6b9bcaa85b95bd619443163174b9bd17
[INFO] running `Command { std: "docker" "start" "-a" "3736e9fc755e41881d28404116acc44e6b9bcaa85b95bd619443163174b9bd17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3736e9fc755e41881d28404116acc44e6b9bcaa85b95bd619443163174b9bd17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3736e9fc755e41881d28404116acc44e6b9bcaa85b95bd619443163174b9bd17", kill_on_drop: false }`
[INFO] [stdout] 3736e9fc755e41881d28404116acc44e6b9bcaa85b95bd619443163174b9bd17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e4e62df502ffdc1beec73eb774bf9faa4d070445f880448657ddf7a626fdd8a7
[INFO] running `Command { std: "docker" "start" "-a" "e4e62df502ffdc1beec73eb774bf9faa4d070445f880448657ddf7a626fdd8a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling rustix v0.38.28
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling bitflags v2.4.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling fastrand v2.0.1
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling overload v0.1.1
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling simdutf8 v0.1.4
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling nu-ansi-term v0.46.0
[INFO] [stderr]    Compiling rand_xorshift v0.3.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling unarray v0.1.4
[INFO] [stderr]    Compiling time v0.3.31
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling defer-lite v1.0.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling crossbeam-channel v0.5.10
[INFO] [stderr]    Compiling tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling tempfile v3.9.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling async-recursion v1.0.5
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling tracing-appender v0.2.3
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling bytes v1.5.0
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling tokio v1.35.1
[INFO] [stderr]    Compiling faststr v0.2.16
[INFO] [stderr]    Compiling integer-encoding v3.0.4
[INFO] [stderr]    Compiling linkedbytes v0.1.8
[INFO] [stderr]    Compiling pilota v0.7.0
[INFO] [stderr]    Compiling fcplug v0.4.3 (/opt/rustwide/workdir)
[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(downcast_unchecked)]
[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_v2)]
[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(new_uninit)]
[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:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_trait_impl)]
[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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(downcast_unchecked)]
[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:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait_v2)]
[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:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(new_uninit)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fcplug` (lib) due to 8 previous errors
[INFO] running `Command { std: "docker" "inspect" "e4e62df502ffdc1beec73eb774bf9faa4d070445f880448657ddf7a626fdd8a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4e62df502ffdc1beec73eb774bf9faa4d070445f880448657ddf7a626fdd8a7", kill_on_drop: false }`
[INFO] [stdout] e4e62df502ffdc1beec73eb774bf9faa4d070445f880448657ddf7a626fdd8a7
