[INFO] fetching crate ddsavelib 0.1.1...
[INFO] documenting ddsavelib-0.1.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate ddsavelib 0.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate ddsavelib 0.1.1 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 ddsavelib 0.1.1
[INFO] finished tweaking crates.io crate ddsavelib 0.1.1
[INFO] tweaked toml for crates.io crate ddsavelib 0.1.1 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] 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] e2b4b79baf34f6865b16f6e2c1dd080ab596b337b16e5df0bc8e2bd6afeac93e
[INFO] running `Command { std: "docker" "start" "-a" "e2b4b79baf34f6865b16f6e2c1dd080ab596b337b16e5df0bc8e2bd6afeac93e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2b4b79baf34f6865b16f6e2c1dd080ab596b337b16e5df0bc8e2bd6afeac93e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2b4b79baf34f6865b16f6e2c1dd080ab596b337b16e5df0bc8e2bd6afeac93e", kill_on_drop: false }`
[INFO] [stdout] e2b4b79baf34f6865b16f6e2c1dd080ab596b337b16e5df0bc8e2bd6afeac93e
[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] ec34ab564e46ff9377a506486f7398829a0817c6b390d8739a665b8c6fecb491
[INFO] running `Command { std: "docker" "start" "-a" "ec34ab564e46ff9377a506486f7398829a0817c6b390d8739a665b8c6fecb491", kill_on_drop: false }`
[INFO] [stderr]     Checking siphasher v0.3.11
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]     Checking string_cache v0.8.7
[INFO] [stderr]  Documenting ddsavelib v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(try_reserve)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:54:1
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(or_patterns)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `or_patterns` has been stable since `1.53.0` and no longer requires an attribute to enable
[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 `ddsavelib`
[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=2018 --crate-type lib --crate-name ddsavelib src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="string_cache"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7c4de6b77d6b7f85 -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-7620dcb02882a88c.rmeta --extern dtoa=/opt/rustwide/target/debug/deps/libdtoa-9e293337e3c7e69e.rmeta --extern itoa=/opt/rustwide/target/debug/deps/libitoa-7978ceb2f405d613.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-94384e5ea6a973b7.rmeta --extern string_cache=/opt/rustwide/target/debug/deps/libstring_cache-0320429e335225b4.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ec34ab564e46ff9377a506486f7398829a0817c6b390d8739a665b8c6fecb491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec34ab564e46ff9377a506486f7398829a0817c6b390d8739a665b8c6fecb491", kill_on_drop: false }`
[INFO] [stdout] ec34ab564e46ff9377a506486f7398829a0817c6b390d8739a665b8c6fecb491
