[INFO] fetching crate derive-discriminant 0.1.1...
[INFO] testing derive-discriminant-0.1.1 against 1.76.0 for beta-1.77-1
[INFO] extracting crate derive-discriminant 0.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate derive-discriminant 0.1.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate derive-discriminant 0.1.1
[INFO] finished tweaking crates.io crate derive-discriminant 0.1.1
[INFO] tweaked toml for crates.io crate derive-discriminant 0.1.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 937fc9c36d1ef00921dda63370f8c145aa3a549ef12f753a8bf0c9af3d791716
[INFO] running `Command { std: "docker" "start" "-a" "937fc9c36d1ef00921dda63370f8c145aa3a549ef12f753a8bf0c9af3d791716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "937fc9c36d1ef00921dda63370f8c145aa3a549ef12f753a8bf0c9af3d791716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "937fc9c36d1ef00921dda63370f8c145aa3a549ef12f753a8bf0c9af3d791716", kill_on_drop: false }`
[INFO] [stdout] 937fc9c36d1ef00921dda63370f8c145aa3a549ef12f753a8bf0c9af3d791716
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c1ea373b1d51bf8ddf2f8c06c8e9026343fd56ee8e1fb0f28a27d2529fb96c2
[INFO] running `Command { std: "docker" "start" "-a" "6c1ea373b1d51bf8ddf2f8c06c8e9026343fd56ee8e1fb0f28a27d2529fb96c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling derive-discriminant v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "6c1ea373b1d51bf8ddf2f8c06c8e9026343fd56ee8e1fb0f28a27d2529fb96c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c1ea373b1d51bf8ddf2f8c06c8e9026343fd56ee8e1fb0f28a27d2529fb96c2", kill_on_drop: false }`
[INFO] [stdout] 6c1ea373b1d51bf8ddf2f8c06c8e9026343fd56ee8e1fb0f28a27d2529fb96c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90ad0b2fe5fb83a04ea2077ee4f569c931df673159e02ab1dabf1f9291f8277e
[INFO] running `Command { std: "docker" "start" "-a" "90ad0b2fe5fb83a04ea2077ee4f569c931df673159e02ab1dabf1f9291f8277e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling derive-discriminant v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/macro.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(unsize)]
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive-discriminant` (test "macro") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "90ad0b2fe5fb83a04ea2077ee4f569c931df673159e02ab1dabf1f9291f8277e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90ad0b2fe5fb83a04ea2077ee4f569c931df673159e02ab1dabf1f9291f8277e", kill_on_drop: false }`
[INFO] [stdout] 90ad0b2fe5fb83a04ea2077ee4f569c931df673159e02ab1dabf1f9291f8277e
