[INFO] fetching crate jkcenum_derive 0.2.0...
[INFO] testing jkcenum_derive-0.2.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate jkcenum_derive 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate jkcenum_derive 0.2.0 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 jkcenum_derive 0.2.0
[INFO] finished tweaking crates.io crate jkcenum_derive 0.2.0
[INFO] tweaked toml for crates.io crate jkcenum_derive 0.2.0 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" "+1.75.0" "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 virtue v0.0.15
[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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b98caa9016496a86ac0fb8a5d98cc0b00498379119b4c5c44e0512b2011197d6
[INFO] running `Command { std: "docker" "start" "-a" "b98caa9016496a86ac0fb8a5d98cc0b00498379119b4c5c44e0512b2011197d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b98caa9016496a86ac0fb8a5d98cc0b00498379119b4c5c44e0512b2011197d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b98caa9016496a86ac0fb8a5d98cc0b00498379119b4c5c44e0512b2011197d6", kill_on_drop: false }`
[INFO] [stdout] b98caa9016496a86ac0fb8a5d98cc0b00498379119b4c5c44e0512b2011197d6
[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" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa199a397357e97cb591fbba7830c786a5ec7bb2ca206c3a7c2ed717a1f4cbdb
[INFO] running `Command { std: "docker" "start" "-a" "fa199a397357e97cb591fbba7830c786a5ec7bb2ca206c3a7c2ed717a1f4cbdb", kill_on_drop: false }`
[INFO] [stderr]    Compiling virtue v0.0.15
[INFO] [stderr]    Compiling jkcenum_derive v0.2.0 (/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(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `jkcenum_derive` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "fa199a397357e97cb591fbba7830c786a5ec7bb2ca206c3a7c2ed717a1f4cbdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa199a397357e97cb591fbba7830c786a5ec7bb2ca206c3a7c2ed717a1f4cbdb", kill_on_drop: false }`
[INFO] [stdout] fa199a397357e97cb591fbba7830c786a5ec7bb2ca206c3a7c2ed717a1f4cbdb
[INFO] testing jkcenum_derive-0.2.0 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate jkcenum_derive 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate jkcenum_derive 0.2.0 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jkcenum_derive 0.2.0
[INFO] finished tweaking crates.io crate jkcenum_derive 0.2.0
[INFO] tweaked toml for crates.io crate jkcenum_derive 0.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "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" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 755cbd50454458c9f52599f7999f49536835c69cc8c65b1c6954b2684b530fe1
[INFO] running `Command { std: "docker" "start" "-a" "755cbd50454458c9f52599f7999f49536835c69cc8c65b1c6954b2684b530fe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "755cbd50454458c9f52599f7999f49536835c69cc8c65b1c6954b2684b530fe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "755cbd50454458c9f52599f7999f49536835c69cc8c65b1c6954b2684b530fe1", kill_on_drop: false }`
[INFO] [stdout] 755cbd50454458c9f52599f7999f49536835c69cc8c65b1c6954b2684b530fe1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8df12ee54d3bbec499c435fa4441260d42f111fa9856356ec38150312e4bcf26
[INFO] running `Command { std: "docker" "start" "-a" "8df12ee54d3bbec499c435fa4441260d42f111fa9856356ec38150312e4bcf26", kill_on_drop: false }`
[INFO] [stderr]    Compiling virtue v0.0.15
[INFO] [stderr]    Compiling jkcenum_derive v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[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 `jkcenum_derive` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8df12ee54d3bbec499c435fa4441260d42f111fa9856356ec38150312e4bcf26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8df12ee54d3bbec499c435fa4441260d42f111fa9856356ec38150312e4bcf26", kill_on_drop: false }`
[INFO] [stdout] 8df12ee54d3bbec499c435fa4441260d42f111fa9856356ec38150312e4bcf26
