[INFO] fetching crate wasm-slideshow 0.1.0...
[INFO] documenting wasm-slideshow-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate wasm-slideshow 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate wasm-slideshow 0.1.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking crates.io crate wasm-slideshow 0.1.0
[INFO] finished tweaking crates.io crate wasm-slideshow 0.1.0
[INFO] tweaked toml for crates.io crate wasm-slideshow 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b93c9a62a0f464f6815e260142569d65d40f4cebdc59f5948a08c758739f8d7f
[INFO] running `Command { std: "docker" "start" "-a" "b93c9a62a0f464f6815e260142569d65d40f4cebdc59f5948a08c758739f8d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b93c9a62a0f464f6815e260142569d65d40f4cebdc59f5948a08c758739f8d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b93c9a62a0f464f6815e260142569d65d40f4cebdc59f5948a08c758739f8d7f", kill_on_drop: false }`
[INFO] [stdout] b93c9a62a0f464f6815e260142569d65d40f4cebdc59f5948a08c758739f8d7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad034f37dabfcfdf7a5a8ca105120b004b96ed0328a3425ac8fe9baf9d18f4ca
[INFO] running `Command { std: "docker" "start" "-a" "ad034f37dabfcfdf7a5a8ca105120b004b96ed0328a3425ac8fe9baf9d18f4ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.80
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling bumpalo v3.9.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.80
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.80
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.80
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.80
[INFO] [stderr]     Checking js-sys v0.3.57
[INFO] [stderr]     Checking web-sys v0.3.57
[INFO] [stderr]  Documenting wasm-slideshow v0.1.0 (/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(type_ascription)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `wasm-slideshow`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type cdylib --crate-name wasm_slideshow src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5270c2d7d0611beb -L dependency=/opt/rustwide/target/debug/deps --extern js_sys=/opt/rustwide/target/debug/deps/libjs_sys-8cc664e2ce7e2b29.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-e072b0c1ec0e1d18.rmeta --extern web_sys=/opt/rustwide/target/debug/deps/libweb_sys-e6539760ef3f29ba.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ad034f37dabfcfdf7a5a8ca105120b004b96ed0328a3425ac8fe9baf9d18f4ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad034f37dabfcfdf7a5a8ca105120b004b96ed0328a3425ac8fe9baf9d18f4ca", kill_on_drop: false }`
[INFO] [stdout] ad034f37dabfcfdf7a5a8ca105120b004b96ed0328a3425ac8fe9baf9d18f4ca