[INFO] fetching crate libscroll-re 0.1.0...
[INFO] documenting libscroll-re-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate libscroll-re 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate libscroll-re 0.1.0 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 libscroll-re 0.1.0
[INFO] finished tweaking crates.io crate libscroll-re 0.1.0
[INFO] tweaked toml for crates.io crate libscroll-re 0.1.0 written to /workspace/builds/worker-11/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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num v0.2.1
[INFO] [stderr]   Downloaded num-rational v0.2.4
[INFO] [stderr]   Downloaded num-complex v0.2.4
[INFO] [stderr]   Downloaded roots v0.0.6
[INFO] [stderr]   Downloaded flo_curves v0.3.1
[INFO] [stderr]   Downloaded libscroll v0.1.6
[INFO] [stderr]   Downloaded ocaml v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/ram-disk/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/ram-disk/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/ram-disk/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/ram-disk/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] 9dea29f83d9b9cc7081a0f7a83635c975668170c3381e2704855d315600ae4ec
[INFO] running `Command { std: "docker" "start" "-a" "9dea29f83d9b9cc7081a0f7a83635c975668170c3381e2704855d315600ae4ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9dea29f83d9b9cc7081a0f7a83635c975668170c3381e2704855d315600ae4ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dea29f83d9b9cc7081a0f7a83635c975668170c3381e2704855d315600ae4ec", kill_on_drop: false }`
[INFO] [stdout] 9dea29f83d9b9cc7081a0f7a83635c975668170c3381e2704855d315600ae4ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/ram-disk/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/ram-disk/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/ram-disk/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/ram-disk/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] 8e4416abcf8b4a07ede2aed34ba782a8589301a015193f9aa54cc498ed81f70f
[INFO] running `Command { std: "docker" "start" "-a" "8e4416abcf8b4a07ede2aed34ba782a8589301a015193f9aa54cc498ed81f70f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking roots v0.0.6
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking ocaml v0.8.1
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking flo_curves v0.3.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking libscroll v0.1.6
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libscroll-0.1.6/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libscroll-0.1.6/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(half_open_range_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libscroll-0.1.6/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 compile `libscroll` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "8e4416abcf8b4a07ede2aed34ba782a8589301a015193f9aa54cc498ed81f70f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e4416abcf8b4a07ede2aed34ba782a8589301a015193f9aa54cc498ed81f70f", kill_on_drop: false }`
[INFO] [stdout] 8e4416abcf8b4a07ede2aed34ba782a8589301a015193f9aa54cc498ed81f70f