[INFO] fetching crate prefix-map 0.3.1...
[INFO] documenting prefix-map-0.3.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate prefix-map 0.3.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate prefix-map 0.3.1 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 prefix-map 0.3.1
[INFO] finished tweaking crates.io crate prefix-map 0.3.1
[INFO] tweaked toml for crates.io crate prefix-map 0.3.1 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-segmentation v0.1.3
[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] 791a548c031e92331a5778bea3f5d7f9fdfec528d5ef49ede1311e867b9438a2
[INFO] running `Command { std: "docker" "start" "-a" "791a548c031e92331a5778bea3f5d7f9fdfec528d5ef49ede1311e867b9438a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "791a548c031e92331a5778bea3f5d7f9fdfec528d5ef49ede1311e867b9438a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "791a548c031e92331a5778bea3f5d7f9fdfec528d5ef49ede1311e867b9438a2", kill_on_drop: false }`
[INFO] [stdout] 791a548c031e92331a5778bea3f5d7f9fdfec528d5ef49ede1311e867b9438a2
[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] 4c0a75d8f51df34394390d3d203118ba7f514551adca95a439828a484d51ff9c
[INFO] running `Command { std: "docker" "start" "-a" "4c0a75d8f51df34394390d3d203118ba7f514551adca95a439828a484d51ff9c", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-segmentation v0.1.3
[INFO] [stderr]  Documenting prefix-map v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(associated_type_defaults, iter_arith, test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `<Self as std::borrow::ToOwned>::Owned: prefix::OwnedPrefix` is not satisfied
[INFO] [stdout]   --> src/prefix.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         <Self as ToOwned>::Owned;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `prefix::OwnedPrefix` is not implemented for `<Self as std::borrow::ToOwned>::Owned`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `prefix::ToPrefix::OwnedPrefix`
[INFO] [stdout]   --> src/prefix.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |     type OwnedPrefix: OwnedPrefix<Item=Self::OwnedItem> + Borrow<Self> =
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ToPrefix::OwnedPrefix`
[INFO] [stdout] help: consider further restricting the associated type
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait ToPrefix: ToOwned where <Self as std::borrow::ToOwned>::Owned: prefix::OwnedPrefix {
[INFO] [stdout]    |                             ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0275]: overflow evaluating the requirement `<Self as prefix::ToPrefix>::OwnedItem == _`
[INFO] [stdout]   --> src/prefix.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         <Self::OwnedPrefix as OwnedPrefix>::Item;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0275, E0277, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0275`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `prefix-map`
[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 lib --crate-name prefix_map src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6b5f0a4a41a2cda6 -L dependency=/opt/rustwide/target/debug/deps --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-ebce255a22a9b0a1.rmeta --cap-lints=warn --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4c0a75d8f51df34394390d3d203118ba7f514551adca95a439828a484d51ff9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c0a75d8f51df34394390d3d203118ba7f514551adca95a439828a484d51ff9c", kill_on_drop: false }`
[INFO] [stdout] 4c0a75d8f51df34394390d3d203118ba7f514551adca95a439828a484d51ff9c
