[INFO] fetching crate slam-cv 0.1.3...
[INFO] documenting slam-cv-0.1.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate slam-cv 0.1.3 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate slam-cv 0.1.3 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 crates.io crate slam-cv 0.1.3
[INFO] finished tweaking crates.io crate slam-cv 0.1.3
[INFO] tweaked toml for crates.io crate slam-cv 0.1.3 written to /workspace/builds/worker-12/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]  Downloading crates ...
[INFO] [stderr]   Downloaded matrixmultiply v0.2.4
[INFO] [stderr]   Downloaded paste v0.1.18
[INFO] [stderr]   Downloaded generic-array v0.13.3
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[INFO] [stderr]   Downloaded nalgebra v0.21.1
[INFO] [stderr]   Downloaded paste-impl v0.1.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 39e7a4517a66e593e0b2ae646fcc3cf0b6de5e3cbd8dbb4e6ac771571050d7de
[INFO] running `Command { std: "docker" "start" "-a" "39e7a4517a66e593e0b2ae646fcc3cf0b6de5e3cbd8dbb4e6ac771571050d7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39e7a4517a66e593e0b2ae646fcc3cf0b6de5e3cbd8dbb4e6ac771571050d7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39e7a4517a66e593e0b2ae646fcc3cf0b6de5e3cbd8dbb4e6ac771571050d7de", kill_on_drop: false }`
[INFO] [stdout] 39e7a4517a66e593e0b2ae646fcc3cf0b6de5e3cbd8dbb4e6ac771571050d7de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 018a32caa7ee27f8be7feb3679fdda4fbde0de4cf86d5a5311af991cf09ba04e
[INFO] running `Command { std: "docker" "start" "-a" "018a32caa7ee27f8be7feb3679fdda4fbde0de4cf86d5a5311af991cf09ba04e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libm v0.2.2
[INFO] [stderr]    Compiling libc v0.2.126
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[INFO] [stderr]    Compiling getrandom v0.1.16
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[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking adler32 v1.2.0
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[INFO] [stderr]     Checking scoped_threadpool v0.1.9
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[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking simba v0.1.5
[INFO] [stderr]     Checking nalgebra v0.21.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]     Checking cv-core v0.10.0
[INFO] [stderr]  Documenting slam-cv v0.1.3 (/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(associated_type_defaults)]
[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 `slam-cv`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name slam_cv src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="cv-core"' --cfg 'feature="default"' --cfg 'feature="serde"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e55526565862322e -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-1d34aec8242b9cbf.rmeta --extern cv_core=/opt/rustwide/target/debug/deps/libcv_core-3648a1334455ebf8.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-85f1c8939b47920f.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-4d48e7c612e1998b.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-eae9a1a0d5ac8f0e.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-495ec9fdc6b7531e.rmeta --extern simba=/opt/rustwide/target/debug/deps/libsimba-f94bc54c686607c8.rmeta --cap-lints=warn --crate-version 0.1.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "018a32caa7ee27f8be7feb3679fdda4fbde0de4cf86d5a5311af991cf09ba04e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "018a32caa7ee27f8be7feb3679fdda4fbde0de4cf86d5a5311af991cf09ba04e", kill_on_drop: false }`
[INFO] [stdout] 018a32caa7ee27f8be7feb3679fdda4fbde0de4cf86d5a5311af991cf09ba04e