[INFO] fetching crate h_mat 0.1.14...
[INFO] checking h_mat-0.1.14 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate h_mat 0.1.14 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate h_mat 0.1.14
[INFO] finished tweaking crates.io crate h_mat 0.1.14
[INFO] tweaked toml for crates.io crate h_mat 0.1.14 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate h_mat 0.1.14 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.11.0 (available: v0.14.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a70f84b727ff3d4ecba9ea27203fff31604d38d0b3dd0a5e3021d73e7b96428f
[INFO] running `Command { std: "docker" "start" "-a" "a70f84b727ff3d4ecba9ea27203fff31604d38d0b3dd0a5e3021d73e7b96428f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a70f84b727ff3d4ecba9ea27203fff31604d38d0b3dd0a5e3021d73e7b96428f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a70f84b727ff3d4ecba9ea27203fff31604d38d0b3dd0a5e3021d73e7b96428f", kill_on_drop: false }`
[INFO] [stdout] a70f84b727ff3d4ecba9ea27203fff31604d38d0b3dd0a5e3021d73e7b96428f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 194862f788c896524ead7a94f9b48b0c225ef8ab1f228b0d2579c3069791c934
[INFO] running `Command { std: "docker" "start" "-a" "194862f788c896524ead7a94f9b48b0c225ef8ab1f228b0d2579c3069791c934", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking h_mat v0.1.14 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat.rs:66:29
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn get_col_ref<'a>(&'a self, col_idx: usize) -> HCol<&T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                             ^^                               --                        -- the lifetimes get resolved as `'a`
[INFO] [stdout]    |                             |                                |
[INFO] [stdout]    |                             |                                the lifetimes get resolved as `'a`
[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 consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn get_col_ref<'a>(&'a self, col_idx: usize) -> HCol<&'a T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                                                               ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat.rs:75:10
[INFO] [stdout]    |
[INFO] [stdout] 75 |         &'a mut self,
[INFO] [stdout]    |          ^^ this lifetime flows to the output
[INFO] [stdout] 76 |         col_idx: usize,
[INFO] [stdout] 77 |     ) -> HCol<&mut T, <Self as AccessColMut<'a, T>>::Rem>
[INFO] [stdout]    |               ------                        -- the lifetimes get resolved as `'a`
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetimes get resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 77 |     ) -> HCol<&'a mut T, <Self as AccessColMut<'a, T>>::Rem>
[INFO] [stdout]    |                ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]  --> src/h_mat/access_col.rs:9:21
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T, Self::Rem>;
[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] 9 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T, Self::Rem>;
[INFO] [stdout]   |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&mut T, Self::Rem>;
[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] 16 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&'a mut T, Self::Rem>;
[INFO] [stdout]    |                                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:37:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T1, Self::Rem> {
[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] 37 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T1, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T, Self::Rem> {
[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] 47 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:61:21
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T1, Self::Rem> {
[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] 61 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T1, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T, Self::Rem> {
[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] 71 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:85:21
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&mut T1, Self::Rem> {
[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] 85 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&'a mut T1, Self::Rem> {
[INFO] [stdout]    |                                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/h_col.rs:32:27
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn get<'a, D, A>(&'a self) -> Option<&D>
[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] 32 |     pub fn get<'a, D, A>(&'a self) -> Option<&'a D>
[INFO] [stdout]    |                                               ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/h_col.rs:40:31
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn get_mut<'a, D, A>(&'a mut self) -> Option<&mut D>
[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] 40 |     pub fn get_mut<'a, D, A>(&'a mut self) -> Option<&'a mut D>
[INFO] [stdout]    |                                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/h_mat_ref.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_col_ref(&'a self, col_idx: usize) -> HCol<&T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                         ^^                               --                        -- the lifetimes get resolved as `'a`
[INFO] [stdout]    |                         |                                |
[INFO] [stdout]    |                         |                                the lifetimes get resolved as `'a`
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_col_ref(&'a self, col_idx: usize) -> HCol<&'a T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                                                           ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat.rs:66:29
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn get_col_ref<'a>(&'a self, col_idx: usize) -> HCol<&T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                             ^^                               --                        -- the lifetimes get resolved as `'a`
[INFO] [stdout]    |                             |                                |
[INFO] [stdout]    |                             |                                the lifetimes get resolved as `'a`
[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 consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn get_col_ref<'a>(&'a self, col_idx: usize) -> HCol<&'a T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                                                               ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat.rs:75:10
[INFO] [stdout]    |
[INFO] [stdout] 75 |         &'a mut self,
[INFO] [stdout]    |          ^^ this lifetime flows to the output
[INFO] [stdout] 76 |         col_idx: usize,
[INFO] [stdout] 77 |     ) -> HCol<&mut T, <Self as AccessColMut<'a, T>>::Rem>
[INFO] [stdout]    |               ------                        -- the lifetimes get resolved as `'a`
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetimes get resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 77 |     ) -> HCol<&'a mut T, <Self as AccessColMut<'a, T>>::Rem>
[INFO] [stdout]    |                ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]  --> src/h_mat/access_col.rs:9:21
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T, Self::Rem>;
[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] 9 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T, Self::Rem>;
[INFO] [stdout]   |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&mut T, Self::Rem>;
[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] 16 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&'a mut T, Self::Rem>;
[INFO] [stdout]    |                                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:37:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T1, Self::Rem> {
[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] 37 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T1, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T, Self::Rem> {
[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] 47 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:61:21
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T1, Self::Rem> {
[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] 61 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T1, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&T, Self::Rem> {
[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] 71 |     fn get_col_ref(&'a self, idx: usize) -> HCol<&'a T, Self::Rem> {
[INFO] [stdout]    |                                                   ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/access_col.rs:85:21
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&mut T1, Self::Rem> {
[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] 85 |     fn get_col_mut(&'a mut self, idx: usize) -> HCol<&'a mut T1, Self::Rem> {
[INFO] [stdout]    |                                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/h_col.rs:32:27
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn get<'a, D, A>(&'a self) -> Option<&D>
[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] 32 |     pub fn get<'a, D, A>(&'a self) -> Option<&'a D>
[INFO] [stdout]    |                                               ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/h_col.rs:40:31
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn get_mut<'a, D, A>(&'a mut self) -> Option<&mut D>
[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] 40 |     pub fn get_mut<'a, D, A>(&'a mut self) -> Option<&'a mut D>
[INFO] [stdout]    |                                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/h_mat/h_mat_ref.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_col_ref(&'a self, col_idx: usize) -> HCol<&T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                         ^^                               --                        -- the lifetimes get resolved as `'a`
[INFO] [stdout]    |                         |                                |
[INFO] [stdout]    |                         |                                the lifetimes get resolved as `'a`
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_col_ref(&'a self, col_idx: usize) -> HCol<&'a T, <Self as AccessColRef<'a, T>>::Rem>
[INFO] [stdout]    |                                                           ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.09s
[INFO] running `Command { std: "docker" "inspect" "194862f788c896524ead7a94f9b48b0c225ef8ab1f228b0d2579c3069791c934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "194862f788c896524ead7a94f9b48b0c225ef8ab1f228b0d2579c3069791c934", kill_on_drop: false }`
[INFO] [stdout] 194862f788c896524ead7a94f9b48b0c225ef8ab1f228b0d2579c3069791c934