[INFO] fetching crate kira_framework_proc 0.2.3...
[INFO] testing kira_framework_proc-0.2.3 against 1.90.0 for beta-1.91-3
[INFO] extracting crate kira_framework_proc 0.2.3 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate kira_framework_proc 0.2.3
[INFO] finished tweaking crates.io crate kira_framework_proc 0.2.3
[INFO] tweaked toml for crates.io crate kira_framework_proc 0.2.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate kira_framework_proc 0.2.3 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded to_snake_case v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a52c5f847d31ef16319d2dc92756e55c93f35f03dd2962a4f2a895ff1b7265e
[INFO] running `Command { std: "docker" "start" "-a" "0a52c5f847d31ef16319d2dc92756e55c93f35f03dd2962a4f2a895ff1b7265e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a52c5f847d31ef16319d2dc92756e55c93f35f03dd2962a4f2a895ff1b7265e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a52c5f847d31ef16319d2dc92756e55c93f35f03dd2962a4f2a895ff1b7265e", kill_on_drop: false }`
[INFO] [stdout] 0a52c5f847d31ef16319d2dc92756e55c93f35f03dd2962a4f2a895ff1b7265e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ecc5e2a43e7600d8dcdeeb3b4e8add0ff71b183b99d317c767dae657fcd3e9c
[INFO] running `Command { std: "docker" "start" "-a" "7ecc5e2a43e7600d8dcdeeb3b4e8add0ff71b183b99d317c767dae657fcd3e9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling to_snake_case v0.1.1
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/to_snake_case-0.1.1/src/lib.rs:58:20
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 if let Some((false, c3)) = n3
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/to_snake_case-0.1.1/src/lib.rs:59:20
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 && let Some((false, c2)) = n2
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/to_snake_case-0.1.1/src/lib.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |                 if let Some((true, _)) = n2 && n1.1.is_uppercase() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/to_snake_case-0.1.1/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(let_chains)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `let_chains` has been stable since `1.88.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `to_snake_case` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "7ecc5e2a43e7600d8dcdeeb3b4e8add0ff71b183b99d317c767dae657fcd3e9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ecc5e2a43e7600d8dcdeeb3b4e8add0ff71b183b99d317c767dae657fcd3e9c", kill_on_drop: false }`
[INFO] [stdout] 7ecc5e2a43e7600d8dcdeeb3b4e8add0ff71b183b99d317c767dae657fcd3e9c