[INFO] cloning repository https://github.com/marxin/mdbook-linkcheck2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marxin/mdbook-linkcheck2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarxin%2Fmdbook-linkcheck2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarxin%2Fmdbook-linkcheck2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c237f18f10bba35b8446be67ac4568522d7e79c0
[INFO] checking marxin/mdbook-linkcheck2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarxin%2Fmdbook-linkcheck2" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-5-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/marxin/mdbook-linkcheck2
[INFO] finished tweaking git repo https://github.com/marxin/mdbook-linkcheck2
[INFO] tweaked toml for git repo https://github.com/marxin/mdbook-linkcheck2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/marxin/mdbook-linkcheck2 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/marxin/mdbook-linkcheck2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08df43f96773df6b08a928c90c6596a02e5773651e16aaff8acb7c28c72e556a
[INFO] running `Command { std: "docker" "start" "-a" "08df43f96773df6b08a928c90c6596a02e5773651e16aaff8acb7c28c72e556a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08df43f96773df6b08a928c90c6596a02e5773651e16aaff8acb7c28c72e556a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08df43f96773df6b08a928c90c6596a02e5773651e16aaff8acb7c28c72e556a", kill_on_drop: false }`
[INFO] [stdout] 08df43f96773df6b08a928c90c6596a02e5773651e16aaff8acb7c28c72e556a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c46dc05da14ed369d963f9f4f0a07d9f90d14f56e8f4f5a0c75a81b5d59d4b62
[INFO] running `Command { std: "docker" "start" "-a" "c46dc05da14ed369d963f9f4f0a07d9f90d14f56e8f4f5a0c75a81b5d59d4b62", kill_on_drop: false }`
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[INFO] [stderr]     Checking mdbook-linkcheck2 v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/context.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cache(&self) -> Option<MutexGuard<Cache>> {
[INFO] [stdout]    |              ^^^^^            ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |              |
[INFO] [stdout]    |              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cache(&self) -> Option<MutexGuard<'_, Cache>> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/context.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cache(&self) -> Option<MutexGuard<Cache>> {
[INFO] [stdout]    |              ^^^^^            ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |              |
[INFO] [stdout]    |              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cache(&self) -> Option<MutexGuard<'_, Cache>> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking build-info v0.0.39
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/mdbook-linkcheck.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | /     #[structopt(
[INFO] [stdout] 50 | |         short = "f",
[INFO] [stdout] 51 | |         long = "files",
[INFO] [stdout] 52 | |         help = "Limit checking of web links to only the given files (check all files if omitted).
[INFO] [stdout] 53 | |         Internal links to other Markdown files are always checked in all files, even when this flag is passed."
[INFO] [stdout] 54 | |     )]
[INFO] [stdout] 55 | |     selected_files: Option<Vec<String>>,
[INFO] [stdout]    | |_______________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdbook-linkcheck2` (bin "mdbook-linkcheck2") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/mdbook-linkcheck.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | /     #[structopt(
[INFO] [stdout] 50 | |         short = "f",
[INFO] [stdout] 51 | |         long = "files",
[INFO] [stdout] 52 | |         help = "Limit checking of web links to only the given files (check all files if omitted).
[INFO] [stdout] 53 | |         Internal links to other Markdown files are always checked in all files, even when this flag is passed."
[INFO] [stdout] 54 | |     )]
[INFO] [stdout] 55 | |     selected_files: Option<Vec<String>>,
[INFO] [stdout]    | |_______________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdbook-linkcheck2` (bin "mdbook-linkcheck2" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c46dc05da14ed369d963f9f4f0a07d9f90d14f56e8f4f5a0c75a81b5d59d4b62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c46dc05da14ed369d963f9f4f0a07d9f90d14f56e8f4f5a0c75a81b5d59d4b62", kill_on_drop: false }`
[INFO] [stdout] c46dc05da14ed369d963f9f4f0a07d9f90d14f56e8f4f5a0c75a81b5d59d4b62
