[INFO] fetching crate texcore 0.7.2...
[INFO] testing texcore-0.7.2 against 1.76.0 for beta-1.77-1
[INFO] extracting crate texcore 0.7.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate texcore 0.7.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate texcore 0.7.2
[INFO] finished tweaking crates.io crate texcore 0.7.2
[INFO] tweaked toml for crates.io crate texcore 0.7.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate texcore 0.7.2 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded md-5 v0.9.1
[INFO] [stderr]   Downloaded slug v0.1.4
[INFO] [stderr]   Downloaded watchexec v1.17.2
[INFO] [stderr]   Downloaded mio-extras v2.0.6
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bddfe849be17b637334f0dae716a40c36ed141ff6c9f46d9a537edac2452e6cd
[INFO] running `Command { std: "docker" "start" "-a" "bddfe849be17b637334f0dae716a40c36ed141ff6c9f46d9a537edac2452e6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bddfe849be17b637334f0dae716a40c36ed141ff6c9f46d9a537edac2452e6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bddfe849be17b637334f0dae716a40c36ed141ff6c9f46d9a537edac2452e6cd", kill_on_drop: false }`
[INFO] [stdout] bddfe849be17b637334f0dae716a40c36ed141ff6c9f46d9a537edac2452e6cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b9242f3e504c17e5b8c6e543dfa749adac71ff7dee6585890967b42837ed6b6
[INFO] running `Command { std: "docker" "start" "-a" "0b9242f3e504c17e5b8c6e543dfa749adac71ff7dee6585890967b42837ed6b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling texcore_derive v0.1.0
[INFO] [stderr]    Compiling texcore_traits v0.1.0
[INFO] [stderr]    Compiling texcore v0.7.2 (/opt/rustwide/workdir)
[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(doc_auto_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `texcore` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "0b9242f3e504c17e5b8c6e543dfa749adac71ff7dee6585890967b42837ed6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b9242f3e504c17e5b8c6e543dfa749adac71ff7dee6585890967b42837ed6b6", kill_on_drop: false }`
[INFO] [stdout] 0b9242f3e504c17e5b8c6e543dfa749adac71ff7dee6585890967b42837ed6b6
