[INFO] fetching crate wtx-ui 0.8.3...
[INFO] testing wtx-ui-0.8.3 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate wtx-ui 0.8.3 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate wtx-ui 0.8.3
[INFO] finished tweaking crates.io crate wtx-ui 0.8.3
[INFO] tweaked toml for crates.io crate wtx-ui 0.8.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate wtx-ui 0.8.3 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate wtx-ui 0.8.3 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-tree v0.4.1
[INFO] [stderr]   Downloaded wtx-macros v0.12.1
[INFO] [stderr]   Downloaded clap_derive v4.6.4
[INFO] [stderr]   Downloaded clap v4.6.5
[INFO] [stderr]   Downloaded cc v1.4.0
[INFO] [stderr]   Downloaded zlib-rs v0.6.7
[INFO] [stderr]   Downloaded clap_builder v4.6.5
[INFO] [stderr]   Downloaded blake3 v1.8.5
[INFO] [stderr]   Downloaded wtx v0.52.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279
[INFO] running `Command { std: "docker" "start" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.189
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling shlex v2.0.1
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling bytes v1.12.1
[INFO] [stderr]    Compiling foldhash v0.2.0
[INFO] [stderr]    Compiling hashbrown v0.17.1
[INFO] [stderr]    Compiling cc v1.4.0
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling socket2 v0.6.5
[INFO] [stderr]    Compiling mio v1.2.2
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling syn v3.0.3
[INFO] [stderr]    Compiling tokio-macros v2.7.2
[INFO] [stderr]    Compiling tokio v1.53.1
[INFO] [stderr]    Compiling wtx v0.52.1
[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-0.52.1/src/lib.rs:4:34
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![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" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279", kill_on_drop: false }`
[INFO] [stdout] 881fa6e6fa973c8a7fc6781251781cecbcdcf9eb99163a375243e18816677279
