[INFO] fetching crate maybe-dangling 0.1.0...
[INFO] testing maybe-dangling-0.1.0 against beta-2023-10-04 for beta-1.74-1
[INFO] extracting crate maybe-dangling 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate maybe-dangling 0.1.0 on toolchain beta-2023-10-04
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-10-04" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate maybe-dangling 0.1.0
[INFO] finished tweaking crates.io crate maybe-dangling 0.1.0
[INFO] tweaked toml for crates.io crate maybe-dangling 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-10-04" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-10-04" "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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-10-04" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef8b4322f6cc3d576d5998dcb20202e9494c9a6fcb3b31f8803ccaa1487069f0
[INFO] running `Command { std: "docker" "start" "-a" "ef8b4322f6cc3d576d5998dcb20202e9494c9a6fcb3b31f8803ccaa1487069f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef8b4322f6cc3d576d5998dcb20202e9494c9a6fcb3b31f8803ccaa1487069f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef8b4322f6cc3d576d5998dcb20202e9494c9a6fcb3b31f8803ccaa1487069f0", kill_on_drop: false }`
[INFO] [stdout] ef8b4322f6cc3d576d5998dcb20202e9494c9a6fcb3b31f8803ccaa1487069f0
[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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-10-04" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b729f970be456414266a53734ba190b213d1727926eb323509eef0a0f180d55
[INFO] running `Command { std: "docker" "start" "-a" "7b729f970be456414266a53734ba190b213d1727926eb323509eef0a0f180d55", kill_on_drop: false }`
[INFO] [stderr]    Compiling maybe-dangling v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'cfg_match'
[INFO] [stdout]   --> src/maybe_dangling.rs:65:1
[INFO] [stdout]    |
[INFO] [stdout] 65 | crate::cfg_match! {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #115585 <https://github.com/rust-lang/rust/issues/115585> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: no rules expected the token `feature`
[INFO] [stdout]   --> src/maybe_dangling.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     feature = "nightly-dropck_eyepatch" => {
[INFO] [stdout]    |     ^^^^^^^ no rules expected this token in macro call
[INFO] [stdout]    |
[INFO] [stdout] note: while trying to match `cfg`
[INFO] [stdout]   --> /rustc/b5c050febf10c9bcc0459d41fe2a1e190ad30b8d/library/core/src/macros/mod.rs:358:11
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `cfg_match` is ambiguous
[INFO] [stdout]   --> src/lib.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | use cfg_match;
[INFO] [stdout]    |     ^^^^^^^^^ ambiguous name
[INFO] [stdout]    |
[INFO] [stdout]    = note: ambiguous because of a conflict between a macro-expanded name and a less macro-expanded name from outer scope during import or macro resolution
[INFO] [stdout]    = note: `cfg_match` could refer to a macro from prelude
[INFO] [stdout] note: `cfg_match` could also refer to the macro defined here
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | / macro_rules! cfg_match {
[INFO] [stdout] 18 | |     (
[INFO] [stdout] 19 | |         _ => { $($expansion:tt)* } $(,)?
[INFO] [stdout] 20 | |     ) => (
[INFO] [stdout] ...  |
[INFO] [stdout] 40 | |     });
[INFO] [stdout] 41 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `cfg_match`
[INFO] [stdout]   --> src/lib.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 | macro_rules! cfg_match {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'cfg_match'
[INFO] [stdout]   --> src/lib.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | use cfg_match;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #115585 <https://github.com/rust-lang/rust/issues/115585> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0658, E0659.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maybe-dangling` (lib) due to 5 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "7b729f970be456414266a53734ba190b213d1727926eb323509eef0a0f180d55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b729f970be456414266a53734ba190b213d1727926eb323509eef0a0f180d55", kill_on_drop: false }`
[INFO] [stdout] 7b729f970be456414266a53734ba190b213d1727926eb323509eef0a0f180d55