[INFO] fetching crate swift-precompiler 0.1.6...
[INFO] testing swift-precompiler-0.1.6 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate swift-precompiler 0.1.6 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate swift-precompiler 0.1.6
[INFO] finished tweaking crates.io crate swift-precompiler 0.1.6
[INFO] tweaked toml for crates.io crate swift-precompiler 0.1.6 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate swift-precompiler 0.1.6 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate swift-precompiler 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0b978cc15a06203bd9e71017bab48944f74054aacc98e5b72f6044388c37eac3
[INFO] running `Command { std: "docker" "start" "-a" "0b978cc15a06203bd9e71017bab48944f74054aacc98e5b72f6044388c37eac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b978cc15a06203bd9e71017bab48944f74054aacc98e5b72f6044388c37eac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b978cc15a06203bd9e71017bab48944f74054aacc98e5b72f6044388c37eac3", kill_on_drop: false }`
[INFO] [stdout] 0b978cc15a06203bd9e71017bab48944f74054aacc98e5b72f6044388c37eac3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d4adaba2d527ef7051bdc0264bfb213f1cfdec80bc9707277b0c744b6667d0a
[INFO] running `Command { std: "docker" "start" "-a" "0d4adaba2d527ef7051bdc0264bfb213f1cfdec80bc9707277b0c744b6667d0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling anstyle v1.0.4
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling clap_lex v0.6.0
[INFO] [stderr]    Compiling bit-vec v0.8.0
[INFO] [stderr]    Compiling indexmap v2.1.0
[INFO] [stderr]    Compiling winnow v0.6.5
[INFO] [stderr]    Compiling outref v0.5.1
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling path-dedot v3.1.1
[INFO] [stderr]    Compiling path-absolutize v3.1.1
[INFO] [stderr]    Compiling base64-simd v0.8.0
[INFO] [stderr]    Compiling bit-set v0.8.0
[INFO] [stderr]    Compiling anstream v0.6.18
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling clap_builder v4.4.14
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling clap_derive v4.4.7
[INFO] [stderr]    Compiling fancy-regex v0.14.0
[INFO] [stderr]    Compiling clap v4.4.14
[INFO] [stderr]    Compiling serde_spanned v0.6.5
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling toml_edit v0.22.6
[INFO] [stderr]    Compiling toml v0.8.10
[INFO] [stderr]    Compiling swift-precompiler v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/main.rs:206:40
[INFO] [stdout]     |
[INFO] [stdout] 206 | ...                   if let Ok(ref include_str_path) = include_str_path && !include_str_path.exists() {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `swift-precompiler` (bin "swift-precompiler") due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "0d4adaba2d527ef7051bdc0264bfb213f1cfdec80bc9707277b0c744b6667d0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4adaba2d527ef7051bdc0264bfb213f1cfdec80bc9707277b0c744b6667d0a", kill_on_drop: false }`
[INFO] [stdout] 0d4adaba2d527ef7051bdc0264bfb213f1cfdec80bc9707277b0c744b6667d0a
