[INFO] fetching crate mdbook_rash 2.16.1...
[INFO] checking mdbook_rash-2.16.1 against try#342ed2e8608ee307743c341962b427652cdb06e9 for pr-146562-1
[INFO] extracting crate mdbook_rash 2.16.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mdbook_rash 2.16.1
[INFO] finished tweaking crates.io crate mdbook_rash 2.16.1
[INFO] tweaked toml for crates.io crate mdbook_rash 2.16.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook_rash 2.16.1 on toolchain 342ed2e8608ee307743c341962b427652cdb06e9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+342ed2e8608ee307743c341962b427652cdb06e9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mdbook_rash 2.16.1 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" "+342ed2e8608ee307743c341962b427652cdb06e9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+342ed2e8608ee307743c341962b427652cdb06e9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fb95db4a1e212850107361bd83be61830101a482ada9f7c93a804cbd053ea10
[INFO] running `Command { std: "docker" "start" "-a" "3fb95db4a1e212850107361bd83be61830101a482ada9f7c93a804cbd053ea10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fb95db4a1e212850107361bd83be61830101a482ada9f7c93a804cbd053ea10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fb95db4a1e212850107361bd83be61830101a482ada9f7c93a804cbd053ea10", kill_on_drop: false }`
[INFO] [stdout] 3fb95db4a1e212850107361bd83be61830101a482ada9f7c93a804cbd053ea10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+342ed2e8608ee307743c341962b427652cdb06e9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac4f6a55b39a346b334eb54f191c4efda6a83b415fb531fc8d122466e5d5b843
[INFO] running `Command { std: "docker" "start" "-a" "ac4f6a55b39a346b334eb54f191c4efda6a83b415fb531fc8d122466e5d5b843", kill_on_drop: false }`
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[INFO] [stderr]     Checking mdbook_rash v2.16.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn get_matches(ch: &Chapter) -> Option<Vec<(Match, Option<String>, String)>> {
[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] 42 | fn get_matches(ch: &Chapter) -> Option<Vec<(Match<'_>, Option<String>, String)>> {
[INFO] [stdout]    |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn get_matches(ch: &Chapter) -> Option<Vec<(Match, Option<String>, String)>> {
[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] 42 | fn get_matches(ch: &Chapter) -> Option<Vec<(Match<'_>, Option<String>, String)>> {
[INFO] [stdout]    |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 49s
[INFO] running `Command { std: "docker" "inspect" "ac4f6a55b39a346b334eb54f191c4efda6a83b415fb531fc8d122466e5d5b843", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac4f6a55b39a346b334eb54f191c4efda6a83b415fb531fc8d122466e5d5b843", kill_on_drop: false }`
[INFO] [stdout] ac4f6a55b39a346b334eb54f191c4efda6a83b415fb531fc8d122466e5d5b843