[INFO] fetching crate filetest 0.1.2...
[INFO] documenting filetest-0.1.2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate filetest 0.1.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate filetest 0.1.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate filetest 0.1.2
[INFO] finished tweaking crates.io crate filetest 0.1.2
[INFO] tweaked toml for crates.io crate filetest 0.1.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate filetest 0.1.2 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ee255f55391c07e0966deaefe966fb5f1e00d5733fafffad48831aabdd4b5ab
[INFO] running `Command { std: "docker" "start" "-a" "4ee255f55391c07e0966deaefe966fb5f1e00d5733fafffad48831aabdd4b5ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ee255f55391c07e0966deaefe966fb5f1e00d5733fafffad48831aabdd4b5ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ee255f55391c07e0966deaefe966fb5f1e00d5733fafffad48831aabdd4b5ab", kill_on_drop: false }`
[INFO] [stdout] 4ee255f55391c07e0966deaefe966fb5f1e00d5733fafffad48831aabdd4b5ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c89f0b83bda90ea2162be2d7a1308a6da5689b5ef2dd144b4faae952a2a0815f
[INFO] running `Command { std: "docker" "start" "-a" "c89f0b83bda90ea2162be2d7a1308a6da5689b5ef2dd144b4faae952a2a0815f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking quote v1.0.33
[INFO] [stderr]     Checking syn v2.0.37
[INFO] [stderr]  Documenting filetest v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 document `filetest`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type proc-macro --crate-name filetest src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e82cef72e014bd00 -L dependency=/opt/rustwide/target/debug/deps --extern glob=/opt/rustwide/target/debug/deps/libglob-6a24a213b858fa89.rmeta --extern proc_macro_error=/opt/rustwide/target/debug/deps/libproc_macro_error-c96255b659b8d1a2.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c94dbdfd67cfe90b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-c04f665cd48e9946.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-8fa9ca6637d32fb9.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-951d175325e290f4.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c89f0b83bda90ea2162be2d7a1308a6da5689b5ef2dd144b4faae952a2a0815f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c89f0b83bda90ea2162be2d7a1308a6da5689b5ef2dd144b4faae952a2a0815f", kill_on_drop: false }`
[INFO] [stdout] c89f0b83bda90ea2162be2d7a1308a6da5689b5ef2dd144b4faae952a2a0815f
