[INFO] fetching crate mtl 0.1.5...
[INFO] documenting mtl-0.1.5 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate mtl 0.1.5 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate mtl 0.1.5 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mtl 0.1.5
[INFO] finished tweaking crates.io crate mtl 0.1.5
[INFO] tweaked toml for crates.io crate mtl 0.1.5 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a41cc2f5ad2fbe9a954840eb61280e500d14938cfa0e47361a0c59ecbd64a5d6
[INFO] running `Command { std: "docker" "start" "-a" "a41cc2f5ad2fbe9a954840eb61280e500d14938cfa0e47361a0c59ecbd64a5d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a41cc2f5ad2fbe9a954840eb61280e500d14938cfa0e47361a0c59ecbd64a5d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a41cc2f5ad2fbe9a954840eb61280e500d14938cfa0e47361a0c59ecbd64a5d6", kill_on_drop: false }`
[INFO] [stdout] a41cc2f5ad2fbe9a954840eb61280e500d14938cfa0e47361a0c59ecbd64a5d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21dc068b32d86ee8067ed7394a14721afc4bc161f45f51483ed2ee88cbdbbdbe
[INFO] running `Command { std: "docker" "start" "-a" "21dc068b32d86ee8067ed7394a14721afc4bc161f45f51483ed2ee88cbdbbdbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]  Documenting mtl v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `core::array::FixedSizeArray`
[INFO] [stdout]  --> src/matrix/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::array::FixedSizeArray;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `FixedSizeArray` in `array`
[INFO] [stdout] 
[INFO] [stdout] 
[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(unboxed_closures, fixed_size_array)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mtl`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name mtl src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7c6ae5226268d109 -L dependency=/opt/rustwide/target/debug/deps --extern num=/opt/rustwide/target/debug/deps/libnum-66a0e64bdc12c6c1.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-31679f334e4dd7e9.rmeta --cap-lints=warn --crate-version 0.1.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "21dc068b32d86ee8067ed7394a14721afc4bc161f45f51483ed2ee88cbdbbdbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21dc068b32d86ee8067ed7394a14721afc4bc161f45f51483ed2ee88cbdbbdbe", kill_on_drop: false }`
[INFO] [stdout] 21dc068b32d86ee8067ed7394a14721afc4bc161f45f51483ed2ee88cbdbbdbe
