[INFO] fetching crate electro 0.9.3...
[INFO] documenting electro-0.9.3 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate electro 0.9.3 into /workspace/builds/worker-115/source
[INFO] validating manifest of crates.io crate electro 0.9.3 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate electro 0.9.3
[INFO] finished tweaking crates.io crate electro 0.9.3
[INFO] tweaked toml for crates.io crate electro 0.9.3 written to /workspace/builds/worker-115/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fc5fa16a4ac3304ffb7bc3d5f68479c2867fbc5b903645fa06b47cb84bc0cef
[INFO] running `Command { std: "docker" "start" "-a" "1fc5fa16a4ac3304ffb7bc3d5f68479c2867fbc5b903645fa06b47cb84bc0cef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fc5fa16a4ac3304ffb7bc3d5f68479c2867fbc5b903645fa06b47cb84bc0cef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fc5fa16a4ac3304ffb7bc3d5f68479c2867fbc5b903645fa06b47cb84bc0cef", kill_on_drop: false }`
[INFO] [stdout] 1fc5fa16a4ac3304ffb7bc3d5f68479c2867fbc5b903645fa06b47cb84bc0cef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28f429790c1d00144c106f38f9ba33557d7e723012a2e595b70d562dab21ea77
[INFO] running `Command { std: "docker" "start" "-a" "28f429790c1d00144c106f38f9ba33557d7e723012a2e595b70d562dab21ea77", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]  Documenting electro v0.9.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:126:35
[INFO] [stdout]     |
[INFO] [stdout] 126 |   let bottom_horiz = lower_left[0]...lower_right[0];
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 126 |   let bottom_horiz = lower_left[0]..lower_right[0];
[INFO] [stdout]     |                                   ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 126 |   let bottom_horiz = lower_left[0]..=lower_right[0];
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:128:35
[INFO] [stdout]     |
[INFO] [stdout] 128 |   let right_vert = (upper_right[1]...lower_right[1]).rev();
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 128 |   let right_vert = (upper_right[1]..lower_right[1]).rev();
[INFO] [stdout]     |                                   ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 128 |   let right_vert = (upper_right[1]..=lower_right[1]).rev();
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:129:33
[INFO] [stdout]     |
[INFO] [stdout] 129 |   let top_horiz = (upper_left[0]...upper_right[0]).rev();
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 129 |   let top_horiz = (upper_left[0]..upper_right[0]).rev();
[INFO] [stdout]     |                                 ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 129 |   let top_horiz = (upper_left[0]..=upper_right[0]).rev();
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:257:43
[INFO] [stdout]     |
[INFO] [stdout] 257 |   let conductor_col_inds = conductor_start...conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 257 |   let conductor_col_inds = conductor_start..conductor_end;
[INFO] [stdout]     |                                           ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 257 |   let conductor_col_inds = conductor_start..=conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:274:43
[INFO] [stdout]     |
[INFO] [stdout] 274 |   let conductor_col_inds = conductor_start...conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 274 |   let conductor_col_inds = conductor_start..conductor_end;
[INFO] [stdout]     |                                           ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 274 |   let conductor_col_inds = conductor_start..=conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:300:43
[INFO] [stdout]     |
[INFO] [stdout] 300 |   let conductor_col_inds = conductor_start...conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 300 |   let conductor_col_inds = conductor_start..conductor_end;
[INFO] [stdout]     |                                           ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 300 |   let conductor_col_inds = conductor_start..=conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:322:43
[INFO] [stdout]     |
[INFO] [stdout] 322 |   let conductor_col_inds = conductor_start...conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 322 |   let conductor_col_inds = conductor_start..conductor_end;
[INFO] [stdout]     |                                           ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 322 |   let conductor_col_inds = conductor_start..=conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:341:43
[INFO] [stdout]     |
[INFO] [stdout] 341 |   let conductor_col_inds = conductor_start...conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 341 |   let conductor_col_inds = conductor_start..conductor_end;
[INFO] [stdout]     |                                           ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 341 |   let conductor_col_inds = conductor_start..=conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]    --> src/topo.rs:359:43
[INFO] [stdout]     |
[INFO] [stdout] 359 |   let conductor_col_inds = conductor_start...conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]     |
[INFO] [stdout] 359 |   let conductor_col_inds = conductor_start..conductor_end;
[INFO] [stdout]     |                                           ^^
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout] 359 |   let conductor_col_inds = conductor_start..=conductor_end;
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `electro`
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(inclusive_range_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(step_by)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name electro src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern num=/opt/rustwide/target/debug/deps/libnum-79759a32a21f586c.rmeta --extern rulinalg=/opt/rustwide/target/debug/deps/librulinalg-56516060ef533433.rmeta --cap-lints=warn --crate-version 0.9.3` (exit status: 1)
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 13 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "28f429790c1d00144c106f38f9ba33557d7e723012a2e595b70d562dab21ea77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28f429790c1d00144c106f38f9ba33557d7e723012a2e595b70d562dab21ea77", kill_on_drop: false }`
[INFO] [stdout] 28f429790c1d00144c106f38f9ba33557d7e723012a2e595b70d562dab21ea77
