[INFO] cloning repository https://github.com/cjm00/rust-wfc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cjm00/rust-wfc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcjm00%2Frust-wfc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcjm00%2Frust-wfc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76b262ba3707afe22f6a6d8a9699aa9413d91955
[INFO] documenting cjm00/rust-wfc against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcjm00%2Frust-wfc" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cjm00/rust-wfc 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] started tweaking git repo https://github.com/cjm00/rust-wfc
[INFO] finished tweaking git repo https://github.com/cjm00/rust-wfc
[INFO] tweaked toml for git repo https://github.com/cjm00/rust-wfc written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/cjm00/rust-wfc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded matrixmultiply v0.1.13
[INFO] [stderr]   Downloaded itertools v0.6.0
[INFO] [stderr]   Downloaded ndarray v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] baf480b5fac9d4e67ddc6db9aacb9a3c6d3c7bc9d153c719afe6d72f426d6297
[INFO] running `Command { std: "docker" "start" "-a" "baf480b5fac9d4e67ddc6db9aacb9a3c6d3c7bc9d153c719afe6d72f426d6297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "baf480b5fac9d4e67ddc6db9aacb9a3c6d3c7bc9d153c719afe6d72f426d6297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baf480b5fac9d4e67ddc6db9aacb9a3c6d3c7bc9d153c719afe6d72f426d6297", kill_on_drop: false }`
[INFO] [stdout] baf480b5fac9d4e67ddc6db9aacb9a3c6d3c7bc9d153c719afe6d72f426d6297
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] c8d72f8b880d0b94f8911bb3aa83f20c16ae0c9ff37bb3ef568ae953ff632595
[INFO] running `Command { std: "docker" "start" "-a" "c8d72f8b880d0b94f8911bb3aa83f20c16ae0c9ff37bb3ef568ae953ff632595", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]    Compiling matrixmultiply v0.1.13
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking adler32 v1.0.0
[INFO] [stderr]    Compiling ndarray v0.9.0
[INFO] [stderr]     Checking either v1.1.0
[INFO] [stderr]     Checking inflate v0.1.1
[INFO] [stderr]     Checking bit-vec v0.4.3
[INFO] [stderr]     Checking itertools v0.6.0
[INFO] [stderr]     Checking deflate v0.7.5
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num-integer v0.1.33
[INFO] [stderr]     Checking num-complex v0.1.37
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking png v0.6.2
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]  Documenting rust-wfc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[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 `rust-wfc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name rust_wfc src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f87d3e6f22f8bba4 -L dependency=/opt/rustwide/target/debug/deps --extern bit_vec=/opt/rustwide/target/debug/deps/libbit_vec-c3d2d636a693f53a.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-109a88e60d204dac.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-ed5c0f8811022274.rmeta --extern png=/opt/rustwide/target/debug/deps/libpng-5f893699ff7857e9.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-622f40735e34f1a2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c8d72f8b880d0b94f8911bb3aa83f20c16ae0c9ff37bb3ef568ae953ff632595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8d72f8b880d0b94f8911bb3aa83f20c16ae0c9ff37bb3ef568ae953ff632595", kill_on_drop: false }`
[INFO] [stdout] c8d72f8b880d0b94f8911bb3aa83f20c16ae0c9ff37bb3ef568ae953ff632595