[INFO] fetching crate rtml-rust 0.1.0...
[INFO] testing rtml-rust-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate rtml-rust 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rtml-rust 0.1.0
[INFO] finished tweaking crates.io crate rtml-rust 0.1.0
[INFO] tweaked toml for crates.io crate rtml-rust 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rtml-rust 0.1.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rtml-rust 0.1.0 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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8a4c28acf8e061a01dec44d44b9a1d15e5b35ae4bf51eac8c5a719105fa86a6
[INFO] running `Command { std: "docker" "start" "-a" "d8a4c28acf8e061a01dec44d44b9a1d15e5b35ae4bf51eac8c5a719105fa86a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8a4c28acf8e061a01dec44d44b9a1d15e5b35ae4bf51eac8c5a719105fa86a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8a4c28acf8e061a01dec44d44b9a1d15e5b35ae4bf51eac8c5a719105fa86a6", kill_on_drop: false }`
[INFO] [stdout] d8a4c28acf8e061a01dec44d44b9a1d15e5b35ae4bf51eac8c5a719105fa86a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77b80c9dd90c72d4b7ad69480ecd0358047fd59ece3a7af2164fbeee13a33ff1
[INFO] running `Command { std: "docker" "start" "-a" "77b80c9dd90c72d4b7ad69480ecd0358047fd59ece3a7af2164fbeee13a33ff1", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling aho-corasick v0.7.19
[INFO] [stderr]    Compiling regex v1.7.0
[INFO] [stderr]    Compiling rtml-rust v0.1.0 (/opt/rustwide/workdir)
[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(drain_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<Tag>` in the current scope
[INFO] [stdout]    --> src/main.rs:370:10
[INFO] [stdout]     |
[INFO] [stdout] 367 |       let results: Vec<Tag> = doc
[INFO] [stdout]     |  _____________________________-
[INFO] [stdout] 368 | |         .clone()
[INFO] [stdout] 369 | |         .tags
[INFO] [stdout] 370 | |         .drain_filter(|tag| tag.name.contains(&search_term) == true)
[INFO] [stdout]     | |         -^^^^^^^^^^^^ method not found in `Vec<Tag>`
[INFO] [stdout]     | |_________|
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<SubTag>` in the current scope
[INFO] [stdout]    --> src/main.rs:386:18
[INFO] [stdout]     |
[INFO] [stdout] 383 |               subtags: tag
[INFO] [stdout]     |  ______________________-
[INFO] [stdout] 384 | |                 .subtags
[INFO] [stdout] 385 | |                 .clone()
[INFO] [stdout] 386 | |                 .drain_filter(|subtag| {
[INFO] [stdout]     | |                 -^^^^^^^^^^^^ method not found in `Vec<SubTag>`
[INFO] [stdout]     | |_________________|
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut document = doc;
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtml-rust` (bin "rtml-rust") due to 4 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "77b80c9dd90c72d4b7ad69480ecd0358047fd59ece3a7af2164fbeee13a33ff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b80c9dd90c72d4b7ad69480ecd0358047fd59ece3a7af2164fbeee13a33ff1", kill_on_drop: false }`
[INFO] [stdout] 77b80c9dd90c72d4b7ad69480ecd0358047fd59ece3a7af2164fbeee13a33ff1
