[INFO] cloning repository https://github.com/AlperROzkan/rustfam
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlperROzkan/rustfam" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlperROzkan%2Frustfam", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlperROzkan%2Frustfam'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32ffcfaff87b514ee48962a66ca7acc8baeaa9e9
[INFO] checking AlperROzkan/rustfam against master#36b21637e93b038453924d3c66821089e71d8baa for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlperROzkan%2Frustfam" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AlperROzkan/rustfam
[INFO] finished tweaking git repo https://github.com/AlperROzkan/rustfam
[INFO] tweaked toml for git repo https://github.com/AlperROzkan/rustfam written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AlperROzkan/rustfam on toolchain 36b21637e93b038453924d3c66821089e71d8baa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AlperROzkan/rustfam already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_test v1.0.126
[INFO] [stderr]   Downloaded proc-macro2 v1.0.27
[INFO] [stderr]   Downloaded syn v1.0.72
[INFO] [stderr]   Downloaded serde_json v1.0.64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01463a1a90048d4f4e4eafff1c5d2a8208bfc108ddcba51145e6cf58b09c2238
[INFO] running `Command { std: "docker" "start" "-a" "01463a1a90048d4f4e4eafff1c5d2a8208bfc108ddcba51145e6cf58b09c2238", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01463a1a90048d4f4e4eafff1c5d2a8208bfc108ddcba51145e6cf58b09c2238", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01463a1a90048d4f4e4eafff1c5d2a8208bfc108ddcba51145e6cf58b09c2238", kill_on_drop: false }`
[INFO] [stdout] 01463a1a90048d4f4e4eafff1c5d2a8208bfc108ddcba51145e6cf58b09c2238
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03df99e4c394f7b710d417f86e6ded8410029b752267d7134543000f55267f01
[INFO] running `Command { std: "docker" "start" "-a" "03df99e4c394f7b710d417f86e6ded8410029b752267d7134543000f55267f01", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking serde_test v1.0.126
[INFO] [stderr]     Checking FamRust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/model/family/tree.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn node_1(&self) -> &'a Family<'a> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 47 |         &self.node_1()
[INFO] [stdout]    |          ------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/model/family/tree.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn node_2(&self) -> &'a Family<'a> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 52 |         &self.node_2()
[INFO] [stdout]    |          ------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/model/family/family.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 53  | impl<'a> Family<'a> {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 75  |     pub fn new_existing(
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn add_children(&mut self, children: Vec<Person<'a>>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     pub fn get_family_member_firstname(&mut self, firstname: String) -> Option<Person> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     pub fn get_parent_firstname(&mut self, firstname: String) -> Option<Person> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 158 |     pub fn get_child_firstname(&mut self, firstname: String) -> Option<Person> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 190 |     pub fn init_1() -> Family<'a> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 207 |     pub fn init_2() -> Family<'a> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `linked_1`, `linked_1_mut`, `linked_2`, and `linked_2_mut` are never used
[INFO] [stdout]   --> src/model/family/pairing.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T> Pairing<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 16 |     pub fn new(linked_1: T, linked_2: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn linked_1(&self) -> &T {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn linked_1_mut(&mut self) -> &mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn linked_2(&self) -> &T {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn linked_2_mut(&mut self) -> &mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Tree` is never used
[INFO] [stdout]   --> src/model/family/tree.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Tree<'a> {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `node_1`, and `node_2` are never used
[INFO] [stdout]   --> src/model/family/tree.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl<'a> Tree<'a> {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn node_1(&self) -> &'a Family<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn node_2(&self) -> &'a Family<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `id`, `firstname`, and `lastname` are never used
[INFO] [stdout]   --> src/model/person.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<'a> Person<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn id(&self) -> &u16 {
[INFO] [stdout]    |            ^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn firstname(&self) -> &'a str {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub fn lastname(&self) -> &'a str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/model/family/family.rs:125:40
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub fn get_family_member_firstname(&mut self, firstname: String) -> Option<Person> {
[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] 125 |     pub fn get_family_member_firstname(&mut self, firstname: String) -> Option<Person<'_>> {
[INFO] [stdout]     |                                                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/model/family/family.rs:144:33
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn get_parent_firstname(&mut self, firstname: String) -> Option<Person> {
[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] 144 |     pub fn get_parent_firstname(&mut self, firstname: String) -> Option<Person<'_>> {
[INFO] [stdout]     |                                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/model/family/family.rs:158:32
[INFO] [stdout]     |
[INFO] [stdout] 158 |     pub fn get_child_firstname(&mut self, firstname: String) -> Option<Person> {
[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] 158 |     pub fn get_child_firstname(&mut self, firstname: String) -> Option<Person<'_>> {
[INFO] [stdout]     |                                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/model/family/tree.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn node_1(&self) -> &'a Family<'a> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 47 |         &self.node_1()
[INFO] [stdout]    |          ------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/model/family/tree.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn node_2(&self) -> &'a Family<'a> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 52 |         &self.node_2()
[INFO] [stdout]    |          ------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]   --> src/model/family/tree.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let tree: Tree = Tree::new(fam1, fam2, Pairing::new(&person_1, &person_2));
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_children` and `get_family_member_firstname` are never used
[INFO] [stdout]    --> src/model/family/family.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 53  | impl<'a> Family<'a> {
[INFO] [stdout]     | ------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn add_children(&mut self, children: Vec<Person<'a>>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     pub fn get_family_member_firstname(&mut self, firstname: String) -> Option<Person> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `linked_1`, `linked_1_mut`, `linked_2`, and `linked_2_mut` are never used
[INFO] [stdout]   --> src/model/family/pairing.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T> Pairing<T> {
[INFO] [stdout]    | ------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn linked_1(&self) -> &T {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn linked_1_mut(&mut self) -> &mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn linked_2(&self) -> &T {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn linked_2_mut(&mut self) -> &mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `node_1`, `node_2`, `linking`, and `node_3` are never read
[INFO] [stdout]   --> src/model/family/tree.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Node {
[INFO] [stdout]    |     ---- fields in this variant
[INFO] [stdout] 17 |         node_1: Family<'a>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 18 |         node_2: Family<'a>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 19 |         linking: Pairing<&'a Person<'a>>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 20 |         node_3: Box<Tree<'a>>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `node_1` and `node_2` are never used
[INFO] [stdout]   --> src/model/family/tree.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl<'a> Tree<'a> {
[INFO] [stdout]    | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn node_1(&self) -> &'a Family<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn node_2(&self) -> &'a Family<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `id` and `lastname` are never used
[INFO] [stdout]   --> src/model/person.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<'a> Person<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn id(&self) -> &u16 {
[INFO] [stdout]    |            ^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub fn lastname(&self) -> &'a str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/model/family/family.rs:125:40
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub fn get_family_member_firstname(&mut self, firstname: String) -> Option<Person> {
[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] 125 |     pub fn get_family_member_firstname(&mut self, firstname: String) -> Option<Person<'_>> {
[INFO] [stdout]     |                                                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/model/family/family.rs:144:33
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn get_parent_firstname(&mut self, firstname: String) -> Option<Person> {
[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] 144 |     pub fn get_parent_firstname(&mut self, firstname: String) -> Option<Person<'_>> {
[INFO] [stdout]     |                                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/model/family/family.rs:158:32
[INFO] [stdout]     |
[INFO] [stdout] 158 |     pub fn get_child_firstname(&mut self, firstname: String) -> Option<Person> {
[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] 158 |     pub fn get_child_firstname(&mut self, firstname: String) -> Option<Person<'_>> {
[INFO] [stdout]     |                                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/model/family/family.rs:289:17
[INFO] [stdout]     |
[INFO] [stdout] 289 |                 buf_reader.read_to_string(&mut contents);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 289 |                 let _ = buf_reader.read_to_string(&mut contents);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.98s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: serde_test v1.0.126
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "03df99e4c394f7b710d417f86e6ded8410029b752267d7134543000f55267f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03df99e4c394f7b710d417f86e6ded8410029b752267d7134543000f55267f01", kill_on_drop: false }`
[INFO] [stdout] 03df99e4c394f7b710d417f86e6ded8410029b752267d7134543000f55267f01
