[INFO] fetching crate md_title 0.1.12...
[INFO] checking md_title-0.1.12 against 1.95.0 for pr-155915
[INFO] extracting crate md_title 0.1.12 into /workspace/builds/worker-4-tc1/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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate md_title 0.1.12 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "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" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 79 packages to latest compatible versions
[INFO] [stderr]       Adding html2text v0.13.6 (available: v0.17.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c439962e8e4ad1842de8eafa7e0e80594ae03612a27b2fa9925c66e8021d69c
[INFO] running `Command { std: "docker" "start" "-a" "3c439962e8e4ad1842de8eafa7e0e80594ae03612a27b2fa9925c66e8021d69c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c439962e8e4ad1842de8eafa7e0e80594ae03612a27b2fa9925c66e8021d69c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c439962e8e4ad1842de8eafa7e0e80594ae03612a27b2fa9925c66e8021d69c", kill_on_drop: false }`
[INFO] [stdout] 3c439962e8e4ad1842de8eafa7e0e80594ae03612a27b2fa9925c66e8021d69c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ec18e6c9f573ad8597b3c4f242cdab27dd209709db0332cf0ae976f1eebf380
[INFO] running `Command { std: "docker" "start" "-a" "0ec18e6c9f573ad8597b3c4f242cdab27dd209709db0332cf0ae976f1eebf380", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling siphasher v1.0.3
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]     Checking log v0.4.29
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking new_debug_unreachable v1.0.6
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]     Checking lock_api v0.4.14
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking futf v0.1.5
[INFO] [stderr]    Compiling rand v0.8.6
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling static_init_macro v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.36
[INFO] [stderr]     Checking tendril v0.4.3
[INFO] [stderr]     Checking pin-project-lite v0.2.17
[INFO] [stderr]     Checking regex-syntax v0.8.10
[INFO] [stderr]     Checking phf v0.11.3
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling static_init v1.0.4
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]    Compiling htmlize v1.1.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking thread_local v1.1.9
[INFO] [stderr]     Checking unicode-width v0.2.2
[INFO] [stderr]    Compiling pastey v0.1.1
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking nu-ansi-term v0.50.3
[INFO] [stderr]     Checking xerr v0.1.16
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking aok v0.1.18
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling phf_codegen v0.11.3
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling string_cache_codegen v0.5.4
[INFO] [stderr]    Compiling markup5ever v0.14.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking matchers v0.2.0
[INFO] [stderr]     Checking string_cache v0.8.9
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling match_token v0.1.0
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]     Checking html5ever v0.29.1
[INFO] [stderr]     Checking tokio v1.52.3
[INFO] [stderr]     Checking html2text v0.13.6
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking tracing-subscriber v0.3.23
[INFO] [stderr]     Checking md_title v0.1.12 (/opt/rustwide/workdir)
[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] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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] running `Command { std: "docker" "inspect" "0ec18e6c9f573ad8597b3c4f242cdab27dd209709db0332cf0ae976f1eebf380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ec18e6c9f573ad8597b3c4f242cdab27dd209709db0332cf0ae976f1eebf380", kill_on_drop: false }`
[INFO] [stdout] 0ec18e6c9f573ad8597b3c4f242cdab27dd209709db0332cf0ae976f1eebf380
