[INFO] cloning repository https://github.com/phughk/debug-metrics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/phughk/debug-metrics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphughk%2Fdebug-metrics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphughk%2Fdebug-metrics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e02347557a7887d0875382ec2d28e458325c397
[INFO] checking phughk/debug-metrics against e4d5758286bf2cf6f415802f2cf861747a7c6c8c for pr-152972
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphughk%2Fdebug-metrics" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/phughk/debug-metrics
[INFO] finished tweaking git repo https://github.com/phughk/debug-metrics
[INFO] tweaked toml for git repo https://github.com/phughk/debug-metrics written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/phughk/debug-metrics on toolchain e4d5758286bf2cf6f415802f2cf861747a7c6c8c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4d5758286bf2cf6f415802f2cf861747a7c6c8c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/phughk/debug-metrics 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" "+e4d5758286bf2cf6f415802f2cf861747a7c6c8c" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking phughk/debug-metrics against e4d5758286bf2cf6f415802f2cf861747a7c6c8c for pr-152972
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphughk%2Fdebug-metrics" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/phughk/debug-metrics
[INFO] finished tweaking git repo https://github.com/phughk/debug-metrics
[INFO] tweaked toml for git repo https://github.com/phughk/debug-metrics written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/phughk/debug-metrics on toolchain e4d5758286bf2cf6f415802f2cf861747a7c6c8c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4d5758286bf2cf6f415802f2cf861747a7c6c8c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/phughk/debug-metrics 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" "+e4d5758286bf2cf6f415802f2cf861747a7c6c8c" "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-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23
[INFO] running `Command { std: "docker" "start" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23" "/opt/rustwide/cargo-home/bin/cargo" "+e4d5758286bf2cf6f415802f2cf861747a7c6c8c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23" "/opt/rustwide/cargo-home/bin/cargo" "+e4d5758286bf2cf6f415802f2cf861747a7c6c8c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]    Compiling indoc v2.0.6
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking debug-metrics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]  --> src/test.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use log::debug;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric`
[INFO] [stdout]    --> src/debug_metrics.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 | ...                   metric,
[INFO] [stdout]     |                       ^^^^^^ help: try ignoring the field: `metric: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/debug_metrics.rs:187:29
[INFO] [stdout]     |
[INFO] [stdout] 187 | ...                   count,
[INFO] [stdout]     |                       ^^^^^ help: try ignoring the field: `count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:188:29
[INFO] [stdout]     |
[INFO] [stdout] 188 | ...                   dependencies,
[INFO] [stdout]     |                       ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]    --> src/debug_metrics.rs:194:29
[INFO] [stdout]     |
[INFO] [stdout] 194 | ...                   label,
[INFO] [stdout]     |                       ^^^^^ help: try ignoring the field: `label: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/debug_metrics.rs:195:29
[INFO] [stdout]     |
[INFO] [stdout] 195 | ...                   value,
[INFO] [stdout]     |                       ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:196:29
[INFO] [stdout]     |
[INFO] [stdout] 196 | ...                   dependencies,
[INFO] [stdout]     |                       ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/debug_metrics.rs:331:81
[INFO] [stdout]     |
[INFO] [stdout] 331 |     fn set<Key: Into<String>, Iter: LabelIter>(&mut self, key: Key, value: u64, mut labels: Iter) {
[INFO] [stdout]     |                                                                                 ----^^^^^^
[INFO] [stdout]     |                                                                                 |
[INFO] [stdout]     |                                                                                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric`
[INFO] [stdout]    --> src/debug_metrics.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 | ...                   metric,
[INFO] [stdout]     |                       ^^^^^^ help: try ignoring the field: `metric: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/debug_metrics.rs:187:29
[INFO] [stdout]     |
[INFO] [stdout] 187 | ...                   count,
[INFO] [stdout]     |                       ^^^^^ help: try ignoring the field: `count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:188:29
[INFO] [stdout]     |
[INFO] [stdout] 188 | ...                   dependencies,
[INFO] [stdout]     |                       ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/debug_metrics.rs:385:25
[INFO] [stdout]     |
[INFO] [stdout] 385 |                         count,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]    --> src/debug_metrics.rs:194:29
[INFO] [stdout]     |
[INFO] [stdout] 194 | ...                   label,
[INFO] [stdout]     |                       ^^^^^ help: try ignoring the field: `label: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/debug_metrics.rs:195:29
[INFO] [stdout]     |
[INFO] [stdout] 195 | ...                   value,
[INFO] [stdout]     |                       ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:386:25
[INFO] [stdout]     |
[INFO] [stdout] 386 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:196:29
[INFO] [stdout]     |
[INFO] [stdout] 196 | ...                   dependencies,
[INFO] [stdout]     |                       ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:387:25
[INFO] [stdout]     |
[INFO] [stdout] 387 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/debug_metrics.rs:391:25
[INFO] [stdout]     |
[INFO] [stdout] 391 |                         value,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:393:25
[INFO] [stdout]     |
[INFO] [stdout] 393 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/debug_metrics.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |                         count,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:399:25
[INFO] [stdout]     |
[INFO] [stdout] 399 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:400:25
[INFO] [stdout]     |
[INFO] [stdout] 400 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/debug_metrics.rs:405:25
[INFO] [stdout]     |
[INFO] [stdout] 405 |                         value,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:406:25
[INFO] [stdout]     |
[INFO] [stdout] 406 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:407:25
[INFO] [stdout]     |
[INFO] [stdout] 407 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/debug_metrics.rs:331:81
[INFO] [stdout]     |
[INFO] [stdout] 331 |     fn set<Key: Into<String>, Iter: LabelIter>(&mut self, key: Key, value: u64, mut labels: Iter) {
[INFO] [stdout]     |                                                                                 ----^^^^^^
[INFO] [stdout]     |                                                                                 |
[INFO] [stdout]     |                                                                                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/debug_metrics.rs:385:25
[INFO] [stdout]     |
[INFO] [stdout] 385 |                         count,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:386:25
[INFO] [stdout]     |
[INFO] [stdout] 386 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:387:25
[INFO] [stdout]     |
[INFO] [stdout] 387 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/debug_metrics.rs:391:25
[INFO] [stdout]     |
[INFO] [stdout] 391 |                         value,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:393:25
[INFO] [stdout]     |
[INFO] [stdout] 393 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/debug_metrics.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |                         count,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:399:25
[INFO] [stdout]     |
[INFO] [stdout] 399 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:400:25
[INFO] [stdout]     |
[INFO] [stdout] 400 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/debug_metrics.rs:405:25
[INFO] [stdout]     |
[INFO] [stdout] 405 |                         value,
[INFO] [stdout]     |                         ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependencies`
[INFO] [stdout]    --> src/debug_metrics.rs:406:25
[INFO] [stdout]     |
[INFO] [stdout] 406 |                         dependencies,
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try ignoring the field: `dependencies: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `labels`
[INFO] [stdout]    --> src/debug_metrics.rs:407:25
[INFO] [stdout]     |
[INFO] [stdout] 407 |                         labels,
[INFO] [stdout]     |                         ^^^^^^ help: try ignoring the field: `labels: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debug_metrics`
[INFO] [stdout]    --> src/test.rs:122:26
[INFO] [stdout]     |
[INFO] [stdout] 122 |             pre_setup: &|debug_metrics| {},
[INFO] [stdout]     |                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_debug_metrics`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/debug_metrics.rs:123:31
[INFO] [stdout]     |
[INFO] [stdout] 123 |     fn with_drop_hook<CallFn>(&mut self, call_fn: CallFn) -> DropHook<Self, CallFn>
[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] 123 |     fn with_drop_hook<CallFn>(&mut self, call_fn: CallFn) -> DropHook<'_, Self, CallFn>
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/debug_metrics.rs:123:31
[INFO] [stdout]     |
[INFO] [stdout] 123 |     fn with_drop_hook<CallFn>(&mut self, call_fn: CallFn) -> DropHook<Self, CallFn>
[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] 123 |     fn with_drop_hook<CallFn>(&mut self, call_fn: CallFn) -> DropHook<'_, Self, CallFn>
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.25s
[INFO] running `Command { std: "docker" "inspect" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23", kill_on_drop: false }`
[INFO] [stdout] 7a3d8c617e54da55d4f2b5879c2241aaff65d9a9a428178f219d51c9fb456c23
