[INFO] fetching crate plutus_data_derive 0.0.81...
[INFO] testing plutus_data_derive-0.0.81 against 1.95.0 for beta-1.96-2
[INFO] extracting crate plutus_data_derive 0.0.81 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate plutus_data_derive 0.0.81
[INFO] finished tweaking crates.io crate plutus_data_derive 0.0.81
[INFO] tweaked toml for crates.io crate plutus_data_derive 0.0.81 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate plutus_data_derive 0.0.81 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.117)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 516a8c31c67d45a433b0dbd99a7b31ef508469b1b0b15a9d555d57938837deee
[INFO] running `Command { std: "docker" "start" "-a" "516a8c31c67d45a433b0dbd99a7b31ef508469b1b0b15a9d555d57938837deee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "516a8c31c67d45a433b0dbd99a7b31ef508469b1b0b15a9d555d57938837deee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "516a8c31c67d45a433b0dbd99a7b31ef508469b1b0b15a9d555d57938837deee", kill_on_drop: false }`
[INFO] [stdout] 516a8c31c67d45a433b0dbd99a7b31ef508469b1b0b15a9d555d57938837deee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b00a413129d4a9990238dcf0a77104f38ccccdadae28bd0a660f9fcc76d09c0
[INFO] running `Command { std: "docker" "start" "-a" "8b00a413129d4a9990238dcf0a77104f38ccccdadae28bd0a660f9fcc76d09c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling plutus_data_derive v0.0.81 (/opt/rustwide/workdir)
[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(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `plutus_data_derive` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8b00a413129d4a9990238dcf0a77104f38ccccdadae28bd0a660f9fcc76d09c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b00a413129d4a9990238dcf0a77104f38ccccdadae28bd0a660f9fcc76d09c0", kill_on_drop: false }`
[INFO] [stdout] 8b00a413129d4a9990238dcf0a77104f38ccccdadae28bd0a660f9fcc76d09c0
