[INFO] fetching crate md_title 0.1.12...
[INFO] testing md_title-0.1.12 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate md_title 0.1.12 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate md_title 0.1.12
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate md_title 0.1.12
[INFO] tweaked toml for crates.io crate md_title 0.1.12 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate md_title 0.1.12 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "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" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 80 packages to highest compatible versions
[INFO] [stderr]       Adding html2text v0.13.6 (available: v0.17.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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] 45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a
[INFO] running `Command { std: "docker" "start" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a", 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" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a", 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" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling siphasher v1.0.4
[INFO] [stderr]    Compiling serde v1.0.229
[INFO] [stderr]    Compiling smallvec v1.16.3
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling rand v0.8.8
[INFO] [stderr]    Compiling syn v3.0.9
[INFO] [stderr]    Compiling thiserror v2.0.21
[INFO] [stderr]    Compiling match_token v0.1.0
[INFO] [stderr]    Compiling htmlize v1.1.0
[INFO] [stderr]    Compiling pastey v0.1.1
[INFO] [stderr]    Compiling aok v0.1.18
[INFO] [stderr]    Compiling xerr v0.1.16
[INFO] [stderr]    Compiling futf v0.1.5
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling tendril v0.4.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling phf v0.11.3
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling string_cache_codegen v0.5.4
[INFO] [stderr]    Compiling phf_codegen v0.11.3
[INFO] [stderr]    Compiling string_cache v0.8.9
[INFO] [stderr]    Compiling markup5ever v0.14.1
[INFO] [stderr]    Compiling html5ever v0.29.1
[INFO] [stderr]    Compiling thiserror-impl v2.0.21
[INFO] [stderr]    Compiling html2text v0.13.6
[INFO] [stderr]    Compiling md_title v0.1.12 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_trait_impl)]
[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 `md_title` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused dependency `aok`
[INFO] [stderr]  --> Cargo.toml:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | [dependencies.aok]
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `aok`
[INFO] [stderr] warning: `md_title` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "inspect" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a", kill_on_drop: false }`
[INFO] [stdout] 45ba14f674b693c3ec0abc6f0e8582a475a8d625ce1326f1c1462e13fa04033a
