[INFO] fetching crate fluent_web 0.3.9...
[INFO] testing fluent_web-0.3.9 against 1.76.0 for beta-1.77-1
[INFO] extracting crate fluent_web 0.3.9 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate fluent_web 0.3.9 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 fluent_web 0.3.9
[INFO] finished tweaking crates.io crate fluent_web 0.3.9
[INFO] tweaked toml for crates.io crate fluent_web 0.3.9 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate fluent_web 0.3.9 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror v1.0.49
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[INFO] [stderr]   Downloaded lightningcss-derive v1.0.0-alpha.40
[INFO] [stderr]   Downloaded template-quote-impl v0.3.0
[INFO] [stderr]   Downloaded lightningcss v1.0.0-alpha.47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a1a4e7c4a9090ffde215c7f29c6448c4488b4205367c76b4b7e1655677f5178d
[INFO] running `Command { std: "docker" "start" "-a" "a1a4e7c4a9090ffde215c7f29c6448c4488b4205367c76b4b7e1655677f5178d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1a4e7c4a9090ffde215c7f29c6448c4488b4205367c76b4b7e1655677f5178d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1a4e7c4a9090ffde215c7f29c6448c4488b4205367c76b4b7e1655677f5178d", kill_on_drop: false }`
[INFO] [stdout] a1a4e7c4a9090ffde215c7f29c6448c4488b4205367c76b4b7e1655677f5178d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] b19f6f78e2369a3588d3187708feca34da44a5b1b0800d2f8eac8611c3d48106
[INFO] running `Command { std: "docker" "start" "-a" "b19f6f78e2369a3588d3187708feca34da44a5b1b0800d2f8eac8611c3d48106", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.12
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[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling parcel_selectors v0.26.2
[INFO] [stderr]    Compiling proc-quote v0.4.0
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[INFO] [stderr]    Compiling string_cache v0.8.7
[INFO] [stderr]    Compiling cssparser-macros v0.6.1
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling miette-derive v5.10.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
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[INFO] [stderr]    Compiling phf_macros v0.8.0
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[INFO] [stderr]    Compiling const-str-proc-macro v0.3.2
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling lightningcss-derive v1.0.0-alpha.40
[INFO] [stderr]    Compiling template-quote-impl v0.3.0
[INFO] [stderr]    Compiling miette v5.10.0
[INFO] [stderr]    Compiling cssparser-color v0.1.0
[INFO] [stderr]    Compiling const-str v0.3.2
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling template-quote v0.3.0
[INFO] [stderr]    Compiling lightningcss v1.0.0-alpha.47
[INFO] [stderr]    Compiling kuchikiki v0.8.2
[INFO] [stderr]    Compiling fluent_web v0.3.9 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[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 `fluent_web` (bin "fluent_web") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b19f6f78e2369a3588d3187708feca34da44a5b1b0800d2f8eac8611c3d48106", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b19f6f78e2369a3588d3187708feca34da44a5b1b0800d2f8eac8611c3d48106", kill_on_drop: false }`
[INFO] [stdout] b19f6f78e2369a3588d3187708feca34da44a5b1b0800d2f8eac8611c3d48106
