[INFO] fetching crate mock_me 0.2.3...
[INFO] documenting mock_me-0.2.3 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate mock_me 0.2.3 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate mock_me 0.2.3 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 mock_me 0.2.3
[INFO] finished tweaking crates.io crate mock_me 0.2.3
[INFO] tweaked toml for crates.io crate mock_me 0.2.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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] [stderr] warning: library `mock_me` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mock_me_test_context v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e4c5255e32d811f51d7801a88cdd69407690548011d9a2d5fa3f3dfc1acc2c9a
[INFO] running `Command { std: "docker" "start" "-a" "e4c5255e32d811f51d7801a88cdd69407690548011d9a2d5fa3f3dfc1acc2c9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4c5255e32d811f51d7801a88cdd69407690548011d9a2d5fa3f3dfc1acc2c9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4c5255e32d811f51d7801a88cdd69407690548011d9a2d5fa3f3dfc1acc2c9a", kill_on_drop: false }`
[INFO] [stdout] e4c5255e32d811f51d7801a88cdd69407690548011d9a2d5fa3f3dfc1acc2c9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] de1ec6b33db9336a13c9718c63b87de074a168a80fc156dc49e89ffb1632d65c
[INFO] running `Command { std: "docker" "start" "-a" "de1ec6b33db9336a13c9718c63b87de074a168a80fc156dc49e89ffb1632d65c", kill_on_drop: false }`
[INFO] [stderr] warning: library `mock_me` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking mock_me_test_context v0.1.2
[INFO] [stderr]  Documenting mock_me v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | #![feature(proc_macro)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `proc_macro` has been stable since `1.29.0` and no longer requires an attribute to enable
[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 `mock_me`
[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 --crate-type proc-macro --crate-name mock_me src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=20ac51ce7749a0a3 -L dependency=/opt/rustwide/target/debug/deps --extern mock_me_test_context=/opt/rustwide/target/debug/deps/libmock_me_test_context-51c56cd14368884d.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.2.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "de1ec6b33db9336a13c9718c63b87de074a168a80fc156dc49e89ffb1632d65c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de1ec6b33db9336a13c9718c63b87de074a168a80fc156dc49e89ffb1632d65c", kill_on_drop: false }`
[INFO] [stdout] de1ec6b33db9336a13c9718c63b87de074a168a80fc156dc49e89ffb1632d65c
