[INFO] fetching crate wtx-apis 0.2.0...
[INFO] testing wtx-apis-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate wtx-apis 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain
[INFO] started tweaking crates.io crate wtx-apis 0.2.0
[INFO] finished tweaking crates.io crate wtx-apis 0.2.0
[INFO] tweaked toml for crates.io crate wtx-apis 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate wtx-apis 0.2.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate wtx-apis 0.2.0 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f861c9a37248411c62c609c6a5e267a494f1e524c8abadf3bc8a5ef63eb13fd1
[INFO] running `Command { std: "docker" "start" "-a" "f861c9a37248411c62c609c6a5e267a494f1e524c8abadf3bc8a5ef63eb13fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f861c9a37248411c62c609c6a5e267a494f1e524c8abadf3bc8a5ef63eb13fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f861c9a37248411c62c609c6a5e267a494f1e524c8abadf3bc8a5ef63eb13fd1", kill_on_drop: false }`
[INFO] [stdout] f861c9a37248411c62c609c6a5e267a494f1e524c8abadf3bc8a5ef63eb13fd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9595d4e0f87a51152c049c73d5f7599d2c0b91be77ae532f8b622066adb035d4
[INFO] running `Command { std: "docker" "start" "-a" "9595d4e0f87a51152c049c73d5f7599d2c0b91be77ae532f8b622066adb035d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling wtx-macros v0.6.4
[INFO] [stderr]    Compiling wtx v0.43.1
[INFO] [stderr]    Compiling wtx-apis v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.60s
[INFO] running `Command { std: "docker" "inspect" "9595d4e0f87a51152c049c73d5f7599d2c0b91be77ae532f8b622066adb035d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9595d4e0f87a51152c049c73d5f7599d2c0b91be77ae532f8b622066adb035d4", kill_on_drop: false }`
[INFO] [stdout] 9595d4e0f87a51152c049c73d5f7599d2c0b91be77ae532f8b622066adb035d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 765f736a960becae7b39d18ff38d169895ac6dbc16363b5c427bb1c82c7b233c
[INFO] running `Command { std: "docker" "start" "-a" "765f736a960becae7b39d18ff38d169895ac6dbc16363b5c427bb1c82c7b233c", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]    Compiling cc v1.2.57
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling rustls v0.23.37
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling rustls-pemfile v2.2.0
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling hybrid-array v0.4.8
[INFO] [stderr]    Compiling block-buffer v0.12.0
[INFO] [stderr]    Compiling crypto-common v0.2.1
[INFO] [stderr]    Compiling digest v0.11.2
[INFO] [stderr]    Compiling sha1 v0.11.0-rc.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling tokio-macros v2.6.1
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling wtx-macros v0.6.4
[INFO] [stderr]    Compiling rust_decimal_macros v1.40.0
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling tracing-subscriber v0.3.23
[INFO] [stderr]    Compiling rustls-webpki v0.103.10
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling tracing-tree v0.4.1
[INFO] [stderr]    Compiling tokio-rustls v0.26.4
[INFO] [stderr]    Compiling wtx v0.43.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/wtx-0.43.1/src/lib.rs:5:34
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "nightly", feature(random, return_type_notation))]
[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 `wtx` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "765f736a960becae7b39d18ff38d169895ac6dbc16363b5c427bb1c82c7b233c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "765f736a960becae7b39d18ff38d169895ac6dbc16363b5c427bb1c82c7b233c", kill_on_drop: false }`
[INFO] [stdout] 765f736a960becae7b39d18ff38d169895ac6dbc16363b5c427bb1c82c7b233c
