[INFO] cloning repository https://github.com/mindbeam/editor-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mindbeam/editor-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmindbeam%2Feditor-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmindbeam%2Feditor-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9c448693dd3f8310c5035d6dbb37af4076c9df5
[INFO] documenting mindbeam/editor-experiment against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmindbeam%2Feditor-experiment" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mindbeam/editor-experiment on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mindbeam/editor-experiment
[INFO] finished tweaking git repo https://github.com/mindbeam/editor-experiment
[INFO] tweaked toml for git repo https://github.com/mindbeam/editor-experiment written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/mindbeam/editor-experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.crate-type
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-core v0.1.14
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[INFO] [stderr]   Downloaded signal-hook v0.1.16
[INFO] [stderr]   Downloaded enumset_derive v0.5.0
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[INFO] [stderr]   Downloaded cursive v0.15.0
[INFO] [stderr]   Downloaded cursive_core v0.1.1
[INFO] [stderr]   Downloaded tracing-attributes v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb8ddafb545e8c7032c3b487f2741f6059e502aa9368f72c7b2ee06c7ce50561
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "eb8ddafb545e8c7032c3b487f2741f6059e502aa9368f72c7b2ee06c7ce50561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb8ddafb545e8c7032c3b487f2741f6059e502aa9368f72c7b2ee06c7ce50561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb8ddafb545e8c7032c3b487f2741f6059e502aa9368f72c7b2ee06c7ce50561", kill_on_drop: false }`
[INFO] [stdout] eb8ddafb545e8c7032c3b487f2741f6059e502aa9368f72c7b2ee06c7ce50561
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0d7719fce3cdfef425064d7d8e51bd9a785e4edff27335e5003964b0db28595e
[INFO] running `Command { std: "docker" "start" "-a" "0d7719fce3cdfef425064d7d8e51bd9a785e4edff27335e5003964b0db28595e", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.crate-type
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[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling typenum v1.12.0
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[INFO] [stderr]     Checking structopt v0.3.16
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[INFO] [stderr]     Checking tracing-appender v0.1.1
[INFO] [stderr]     Checking design-study-texteditor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting design-study-texteditor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `document::Document`
[INFO] [stdout]  --> src/node.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{cursor::Cursor, document::Document, util::mutstr::MutStr};
[INFO] [stdout]   |                             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RangeFrom`
[INFO] [stdout]  --> src/util/mutstr.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::{RangeBounds, RangeFrom};
[INFO] [stdout]   |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/cursor.rs:89:63
[INFO] [stdout]    |
[INFO] [stdout] 89 |         self.depth_first_scan(|_node_id, node, render_offset, children| {
[INFO] [stdout]    |                                                               ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_children`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_id`
[INFO] [stdout]   --> src/document.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         mut node_id: NodeId,
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `positions`
[INFO] [stdout]   --> src/document.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         mut positions: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_positions`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `try_avoid_zero`
[INFO] [stdout]   --> src/document.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         try_avoid_zero: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_try_avoid_zero`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `offset`
[INFO] [stdout]    --> src/node.rs:119:30
[INFO] [stdout]     |
[INFO] [stdout] 119 |             Action::Insert { offset, body } => body.find(c),
[INFO] [stdout]     |                              ^^^^^^ help: try ignoring the field: `offset: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/document.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         mut node_id: NodeId,
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/document.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         mut positions: usize,
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 37s
[INFO] running `Command { std: "docker" "inspect" "0d7719fce3cdfef425064d7d8e51bd9a785e4edff27335e5003964b0db28595e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d7719fce3cdfef425064d7d8e51bd9a785e4edff27335e5003964b0db28595e", kill_on_drop: false }`
[INFO] [stdout] 0d7719fce3cdfef425064d7d8e51bd9a785e4edff27335e5003964b0db28595e