[INFO] fetching crate castle_api 0.20.2...
[INFO] testing castle_api-0.20.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate castle_api 0.20.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate castle_api 0.20.2
[INFO] finished tweaking crates.io crate castle_api 0.20.2
[INFO] tweaked toml for crates.io crate castle_api 0.20.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate castle_api 0.20.2 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 77 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 fast-float v0.2.0
[INFO] [stderr]   Downloaded rmpv v1.3.0
[INFO] [stderr]   Downloaded castle_input_cursor v0.20.2
[INFO] [stderr]   Downloaded castle_types v0.20.2
[INFO] [stderr]   Downloaded unzip-n v0.1.2
[INFO] [stderr]   Downloaded castle_schema_parser v0.20.2
[INFO] [stderr]   Downloaded castle_shared_parser v0.20.2
[INFO] [stderr]   Downloaded castle_tokenizer v0.20.2
[INFO] [stderr]   Downloaded byte v0.2.7
[INFO] [stderr]   Downloaded castle_macro v0.20.2
[INFO] [stderr]   Downloaded castle_query_parser v0.20.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 3ae5eee2bd50a0c913ca003c9ce547fd733371d75b27e3d423b9c919b7ca290e
[INFO] running `Command { std: "docker" "start" "-a" "3ae5eee2bd50a0c913ca003c9ce547fd733371d75b27e3d423b9c919b7ca290e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ae5eee2bd50a0c913ca003c9ce547fd733371d75b27e3d423b9c919b7ca290e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ae5eee2bd50a0c913ca003c9ce547fd733371d75b27e3d423b9c919b7ca290e", kill_on_drop: false }`
[INFO] [stdout] 3ae5eee2bd50a0c913ca003c9ce547fd733371d75b27e3d423b9c919b7ca290e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ad73b9de8471b2a82e54460ee86f19d7b14a335127bd29f14b0759cb20592017
[INFO] running `Command { std: "docker" "start" "-a" "ad73b9de8471b2a82e54460ee86f19d7b14a335127bd29f14b0759cb20592017", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling byte v0.2.7
[INFO] [stderr]    Compiling fast-float v0.2.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling rmp v0.8.14
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling rmpv v1.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling async-recursion v1.1.1
[INFO] [stderr]    Compiling unzip-n v0.1.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling uuid v1.18.1
[INFO] [stderr]    Compiling castle_input_cursor v0.20.2
[INFO] [stderr]    Compiling rmp-serde v1.3.0
[INFO] [stderr]    Compiling castle_types v0.20.2
[INFO] [stderr]    Compiling castle_tokenizer v0.20.2
[INFO] [stderr]    Compiling castle_shared_parser v0.20.2
[INFO] [stderr]    Compiling castle_schema_parser v0.20.2
[INFO] [stderr]    Compiling castle_query_parser v0.20.2
[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/castle_query_parser-0.20.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(if_let_guard)]
[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 `castle_query_parser` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ad73b9de8471b2a82e54460ee86f19d7b14a335127bd29f14b0759cb20592017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad73b9de8471b2a82e54460ee86f19d7b14a335127bd29f14b0759cb20592017", kill_on_drop: false }`
[INFO] [stdout] ad73b9de8471b2a82e54460ee86f19d7b14a335127bd29f14b0759cb20592017