[INFO] cloning repository https://github.com/Kerollmops/group-by
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kerollmops/group-by" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerollmops%2Fgroup-by", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerollmops%2Fgroup-by'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 668ee8146c494b26f4c0d279bfc8b7999a0f19b3
[INFO] checking Kerollmops/group-by against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerollmops%2Fgroup-by" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Kerollmops/group-by
[INFO] finished tweaking git repo https://github.com/Kerollmops/group-by
[INFO] tweaked toml for git repo https://github.com/Kerollmops/group-by written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Kerollmops/group-by on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.6.5 (available: v0.9.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01c2c1c492a8b628b48fc99bb381f93942324c33e3249ac52a72d6b309ddaec1
[INFO] running `Command { std: "docker" "start" "-a" "01c2c1c492a8b628b48fc99bb381f93942324c33e3249ac52a72d6b309ddaec1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01c2c1c492a8b628b48fc99bb381f93942324c33e3249ac52a72d6b309ddaec1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01c2c1c492a8b628b48fc99bb381f93942324c33e3249ac52a72d6b309ddaec1", kill_on_drop: false }`
[INFO] [stdout] 01c2c1c492a8b628b48fc99bb381f93942324c33e3249ac52a72d6b309ddaec1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63a6852d264636098538ae9a766785919287bd601bd53dfcce15cc35c1cf9cae
[INFO] running `Command { std: "docker" "start" "-a" "63a6852d264636098538ae9a766785919287bd601bd53dfcce15cc35c1cf9cae", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]     Checking slice-group-by v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:299:34
[INFO] [stdout]     |
[INFO] [stdout] 299 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 299 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:304:27
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:311:21
[INFO] [stdout]     |
[INFO] [stdout] 311 |     fn linear_group(&self) -> LinearGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 311 |     fn linear_group(&self) -> LinearGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:319:34
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:327:27
[INFO] [stdout]     |
[INFO] [stdout] 327 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 327 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:337:21
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn binary_group(&self) -> BinaryGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn binary_group(&self) -> BinaryGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:345:39
[INFO] [stdout]     |
[INFO] [stdout] 345 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<T, F>
[INFO] [stdout]     |                                       ^^^^^              --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 345 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:353:32
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<T, P>
[INFO] [stdout]     |                                ^^^^^                   ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:363:26
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn exponential_group(&self) -> ExponentialGroup<T>
[INFO] [stdout]     |                          ^^^^^     ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn exponential_group(&self) -> ExponentialGroup<'_, T>
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:374:38
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:379:31
[INFO] [stdout]     |
[INFO] [stdout] 379 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 379 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:386:25
[INFO] [stdout]     |
[INFO] [stdout] 386 |     fn linear_group_mut(&mut self) -> LinearGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 386 |     fn linear_group_mut(&mut self) -> LinearGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:395:38
[INFO] [stdout]     |
[INFO] [stdout] 395 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 395 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:403:31
[INFO] [stdout]     |
[INFO] [stdout] 403 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 403 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:413:25
[INFO] [stdout]     |
[INFO] [stdout] 413 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 413 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:422:43
[INFO] [stdout]     |
[INFO] [stdout] 422 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<T, F>
[INFO] [stdout]     |                                           ^^^^^^^^^              ------------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 422 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:430:36
[INFO] [stdout]     |
[INFO] [stdout] 430 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<T, P>
[INFO] [stdout]     |                                    ^^^^^^^^^                   --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 430 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:440:30
[INFO] [stdout]     |
[INFO] [stdout] 440 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<T>
[INFO] [stdout]     |                              ^^^^^^^^^     ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 440 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<'_, T>
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:446:34
[INFO] [stdout]     |
[INFO] [stdout] 446 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 446 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:453:27
[INFO] [stdout]     |
[INFO] [stdout] 453 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 453 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:459:21
[INFO] [stdout]     |
[INFO] [stdout] 459 |     fn linear_group(&self) -> LinearGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 459 |     fn linear_group(&self) -> LinearGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:465:34
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:472:27
[INFO] [stdout]     |
[INFO] [stdout] 472 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 472 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:478:21
[INFO] [stdout]     |
[INFO] [stdout] 478 |     fn binary_group(&self) -> BinaryGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 478 |     fn binary_group(&self) -> BinaryGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:484:39
[INFO] [stdout]     |
[INFO] [stdout] 484 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<T, F>
[INFO] [stdout]     |                                       ^^^^^              --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 484 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:491:32
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<T, P>
[INFO] [stdout]     |                                ^^^^^                   ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:497:26
[INFO] [stdout]     |
[INFO] [stdout] 497 |     fn exponential_group(&self) -> ExponentialGroup<T>
[INFO] [stdout]     |                          ^^^^^     ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 497 |     fn exponential_group(&self) -> ExponentialGroup<'_, T>
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:506:38
[INFO] [stdout]     |
[INFO] [stdout] 506 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 506 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:513:31
[INFO] [stdout]     |
[INFO] [stdout] 513 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 513 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:519:25
[INFO] [stdout]     |
[INFO] [stdout] 519 |     fn linear_group_mut(&mut self) -> LinearGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 519 |     fn linear_group_mut(&mut self) -> LinearGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:525:38
[INFO] [stdout]     |
[INFO] [stdout] 525 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 525 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:532:31
[INFO] [stdout]     |
[INFO] [stdout] 532 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 532 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:538:25
[INFO] [stdout]     |
[INFO] [stdout] 538 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 538 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:544:43
[INFO] [stdout]     |
[INFO] [stdout] 544 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<T, F>
[INFO] [stdout]     |                                           ^^^^^^^^^              ------------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 544 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:551:36
[INFO] [stdout]     |
[INFO] [stdout] 551 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<T, P>
[INFO] [stdout]     |                                    ^^^^^^^^^                   --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 551 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:557:30
[INFO] [stdout]     |
[INFO] [stdout] 557 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<T>
[INFO] [stdout]     |                              ^^^^^^^^^     ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 557 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<'_, T>
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:571:34
[INFO] [stdout]     |
[INFO] [stdout] 571 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 571 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<'_, F>
[INFO] [stdout]     |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:576:27
[INFO] [stdout]     |
[INFO] [stdout] 576 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 576 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<'_, P>
[INFO] [stdout]     |                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:583:21
[INFO] [stdout]     |
[INFO] [stdout] 583 |     fn linear_group(&self) -> LinearStrGroup;
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 583 |     fn linear_group(&self) -> LinearStrGroup<'_>;
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:593:38
[INFO] [stdout]     |
[INFO] [stdout] 593 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 593 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<'_, F>
[INFO] [stdout]     |                                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:598:31
[INFO] [stdout]     |
[INFO] [stdout] 598 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 598 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<'_, P>
[INFO] [stdout]     |                                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:605:25
[INFO] [stdout]     |
[INFO] [stdout] 605 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut;
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 605 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut<'_>;
[INFO] [stdout]     |                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:610:34
[INFO] [stdout]     |
[INFO] [stdout] 610 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 610 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<'_, F>
[INFO] [stdout]     |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:617:27
[INFO] [stdout]     |
[INFO] [stdout] 617 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 617 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<'_, P>
[INFO] [stdout]     |                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:623:21
[INFO] [stdout]     |
[INFO] [stdout] 623 |     fn linear_group(&self) -> LinearStrGroup {
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 623 |     fn linear_group(&self) -> LinearStrGroup<'_> {
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:630:38
[INFO] [stdout]     |
[INFO] [stdout] 630 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 630 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<'_, F>
[INFO] [stdout]     |                                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:637:31
[INFO] [stdout]     |
[INFO] [stdout] 637 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 637 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<'_, P>
[INFO] [stdout]     |                                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:643:25
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut {
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut<'_> {
[INFO] [stdout]     |                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/linear_str_group/linear_str_group.rs:28:25
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn new(string: &'a mut str) -> LinearStrGroupMut {
[INFO] [stdout]    |                         ^^             ----------------- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn new(string: &'a mut str) -> LinearStrGroupMut<'a> {
[INFO] [stdout]    |                                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/linear_group/mod.rs:15:15
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Valid(i32),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Guard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 -         Valid(i32),
[INFO] [stdout] 15 +         Valid(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/linear_group/mod.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Invalid(i32),
[INFO] [stdout]    |         ------- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Guard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -         Invalid(i32),
[INFO] [stdout] 16 +         Invalid(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/binary_group/mod.rs:15:15
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Valid(i32),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Guard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 -         Valid(i32),
[INFO] [stdout] 15 +         Valid(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/binary_group/mod.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Invalid(i32),
[INFO] [stdout]    |         ------- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Guard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -         Invalid(i32),
[INFO] [stdout] 16 +         Invalid(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exponential_group/mod.rs:15:15
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Valid(i32),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Guard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 -         Valid(i32),
[INFO] [stdout] 15 +         Valid(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exponential_group/mod.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Invalid(i32),
[INFO] [stdout]    |         ------- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Guard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -         Invalid(i32),
[INFO] [stdout] 16 +         Invalid(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:299:34
[INFO] [stdout]     |
[INFO] [stdout] 299 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 299 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:304:27
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:311:21
[INFO] [stdout]     |
[INFO] [stdout] 311 |     fn linear_group(&self) -> LinearGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 311 |     fn linear_group(&self) -> LinearGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:319:34
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:327:27
[INFO] [stdout]     |
[INFO] [stdout] 327 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 327 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:337:21
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn binary_group(&self) -> BinaryGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn binary_group(&self) -> BinaryGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:345:39
[INFO] [stdout]     |
[INFO] [stdout] 345 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<T, F>
[INFO] [stdout]     |                                       ^^^^^              --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 345 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:353:32
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<T, P>
[INFO] [stdout]     |                                ^^^^^                   ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:363:26
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn exponential_group(&self) -> ExponentialGroup<T>
[INFO] [stdout]     |                          ^^^^^     ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn exponential_group(&self) -> ExponentialGroup<'_, T>
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:374:38
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:379:31
[INFO] [stdout]     |
[INFO] [stdout] 379 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 379 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:386:25
[INFO] [stdout]     |
[INFO] [stdout] 386 |     fn linear_group_mut(&mut self) -> LinearGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 386 |     fn linear_group_mut(&mut self) -> LinearGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:395:38
[INFO] [stdout]     |
[INFO] [stdout] 395 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 395 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:403:31
[INFO] [stdout]     |
[INFO] [stdout] 403 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 403 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:413:25
[INFO] [stdout]     |
[INFO] [stdout] 413 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 413 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:422:43
[INFO] [stdout]     |
[INFO] [stdout] 422 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<T, F>
[INFO] [stdout]     |                                           ^^^^^^^^^              ------------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 422 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:430:36
[INFO] [stdout]     |
[INFO] [stdout] 430 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<T, P>
[INFO] [stdout]     |                                    ^^^^^^^^^                   --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 430 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:440:30
[INFO] [stdout]     |
[INFO] [stdout] 440 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<T>
[INFO] [stdout]     |                              ^^^^^^^^^     ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 440 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<'_, T>
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:446:34
[INFO] [stdout]     |
[INFO] [stdout] 446 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 446 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:453:27
[INFO] [stdout]     |
[INFO] [stdout] 453 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 453 |     fn linear_group_by<P>(&self, predicate: P) -> LinearGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:459:21
[INFO] [stdout]     |
[INFO] [stdout] 459 |     fn linear_group(&self) -> LinearGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 459 |     fn linear_group(&self) -> LinearGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:465:34
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<T, F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn binary_group_by_key<F, K>(&self, func: F) -> BinaryGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:472:27
[INFO] [stdout]     |
[INFO] [stdout] 472 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<T, P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 472 |     fn binary_group_by<P>(&self, predicate: P) -> BinaryGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:478:21
[INFO] [stdout]     |
[INFO] [stdout] 478 |     fn binary_group(&self) -> BinaryGroup<T>
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 478 |     fn binary_group(&self) -> BinaryGroup<'_, T>
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:484:39
[INFO] [stdout]     |
[INFO] [stdout] 484 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<T, F>
[INFO] [stdout]     |                                       ^^^^^              --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 484 |     fn exponential_group_by_key<F, K>(&self, func: F) -> ExponentialGroupByKey<'_, T, F>
[INFO] [stdout]     |                                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:491:32
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<T, P>
[INFO] [stdout]     |                                ^^^^^                   ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn exponential_group_by<P>(&self, predicate: P) -> ExponentialGroupBy<'_, T, P>
[INFO] [stdout]     |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:497:26
[INFO] [stdout]     |
[INFO] [stdout] 497 |     fn exponential_group(&self) -> ExponentialGroup<T>
[INFO] [stdout]     |                          ^^^^^     ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 497 |     fn exponential_group(&self) -> ExponentialGroup<'_, T>
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:506:38
[INFO] [stdout]     |
[INFO] [stdout] 506 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 506 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:513:31
[INFO] [stdout]     |
[INFO] [stdout] 513 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 513 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:519:25
[INFO] [stdout]     |
[INFO] [stdout] 519 |     fn linear_group_mut(&mut self) -> LinearGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 519 |     fn linear_group_mut(&mut self) -> LinearGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:525:38
[INFO] [stdout]     |
[INFO] [stdout] 525 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<T, F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 525 |     fn binary_group_by_key_mut<F, K>(&mut self, func: F) -> BinaryGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:532:31
[INFO] [stdout]     |
[INFO] [stdout] 532 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<T, P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 532 |     fn binary_group_by_mut<P>(&mut self, predicate: P) -> BinaryGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:538:25
[INFO] [stdout]     |
[INFO] [stdout] 538 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<T>
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 538 |     fn binary_group_mut(&mut self) -> BinaryGroupMut<'_, T>
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:544:43
[INFO] [stdout]     |
[INFO] [stdout] 544 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<T, F>
[INFO] [stdout]     |                                           ^^^^^^^^^              ------------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 544 |     fn exponential_group_by_key_mut<F, K>(&mut self, func: F) -> ExponentialGroupByKeyMut<'_, T, F>
[INFO] [stdout]     |                                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:551:36
[INFO] [stdout]     |
[INFO] [stdout] 551 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<T, P>
[INFO] [stdout]     |                                    ^^^^^^^^^                   --------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 551 |     fn exponential_group_by_mut<P>(&mut self, predicate: P) -> ExponentialGroupByMut<'_, T, P>
[INFO] [stdout]     |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:557:30
[INFO] [stdout]     |
[INFO] [stdout] 557 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<T>
[INFO] [stdout]     |                              ^^^^^^^^^     ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 557 |     fn exponential_group_mut(&mut self) -> ExponentialGroupMut<'_, T>
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:571:34
[INFO] [stdout]     |
[INFO] [stdout] 571 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 571 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<'_, F>
[INFO] [stdout]     |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:576:27
[INFO] [stdout]     |
[INFO] [stdout] 576 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 576 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<'_, P>
[INFO] [stdout]     |                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:583:21
[INFO] [stdout]     |
[INFO] [stdout] 583 |     fn linear_group(&self) -> LinearStrGroup;
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 583 |     fn linear_group(&self) -> LinearStrGroup<'_>;
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:593:38
[INFO] [stdout]     |
[INFO] [stdout] 593 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 593 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<'_, F>
[INFO] [stdout]     |                                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:598:31
[INFO] [stdout]     |
[INFO] [stdout] 598 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 598 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<'_, P>
[INFO] [stdout]     |                                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:605:25
[INFO] [stdout]     |
[INFO] [stdout] 605 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut;
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 605 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut<'_>;
[INFO] [stdout]     |                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:610:34
[INFO] [stdout]     |
[INFO] [stdout] 610 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<F>
[INFO] [stdout]     |                                  ^^^^^              ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 610 |     fn linear_group_by_key<F, K>(&self, func: F) -> LinearStrGroupByKey<'_, F>
[INFO] [stdout]     |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:617:27
[INFO] [stdout]     |
[INFO] [stdout] 617 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<P>
[INFO] [stdout]     |                           ^^^^^                   ------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 617 |     fn linear_group_by<P>(&self, predicate: P) -> LinearStrGroupBy<'_, P>
[INFO] [stdout]     |                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:623:21
[INFO] [stdout]     |
[INFO] [stdout] 623 |     fn linear_group(&self) -> LinearStrGroup {
[INFO] [stdout]     |                     ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 623 |     fn linear_group(&self) -> LinearStrGroup<'_> {
[INFO] [stdout]     |                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:630:38
[INFO] [stdout]     |
[INFO] [stdout] 630 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<F>
[INFO] [stdout]     |                                      ^^^^^^^^^              ------------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 630 |     fn linear_group_by_key_mut<F, K>(&mut self, func: F) -> LinearStrGroupByKeyMut<'_, F>
[INFO] [stdout]     |                                                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:637:31
[INFO] [stdout]     |
[INFO] [stdout] 637 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<P>
[INFO] [stdout]     |                               ^^^^^^^^^                   ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 637 |     fn linear_group_by_mut<P>(&mut self, predicate: P) -> LinearStrGroupByMut<'_, P>
[INFO] [stdout]     |                                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:643:25
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut {
[INFO] [stdout]     |                         ^^^^^^^^^     ----------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn linear_group_mut(&mut self) -> LinearStrGroupMut<'_> {
[INFO] [stdout]     |                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/linear_str_group/linear_str_group.rs:28:25
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn new(string: &'a mut str) -> LinearStrGroupMut {
[INFO] [stdout]    |                         ^^             ----------------- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn new(string: &'a mut str) -> LinearStrGroupMut<'a> {
[INFO] [stdout]    |                                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.39s
[INFO] running `Command { std: "docker" "inspect" "63a6852d264636098538ae9a766785919287bd601bd53dfcce15cc35c1cf9cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63a6852d264636098538ae9a766785919287bd601bd53dfcce15cc35c1cf9cae", kill_on_drop: false }`
[INFO] [stdout] 63a6852d264636098538ae9a766785919287bd601bd53dfcce15cc35c1cf9cae