[INFO] cloning repository https://github.com/JackG-eth/my-rust-std
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JackG-eth/my-rust-std" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackG-eth%2Fmy-rust-std", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackG-eth%2Fmy-rust-std'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c28e25be7a56db689b17fc38a71b36e03a3c973a
[INFO] checking JackG-eth/my-rust-std against try#c86ec274072509d26d0ee52682a0c94ed012ed89 for pr-153027
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackG-eth%2Fmy-rust-std" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JackG-eth/my-rust-std
[INFO] finished tweaking git repo https://github.com/JackG-eth/my-rust-std
[INFO] tweaked toml for git repo https://github.com/JackG-eth/my-rust-std written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JackG-eth/my-rust-std on toolchain c86ec274072509d26d0ee52682a0c94ed012ed89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JackG-eth/my-rust-std 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" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking JackG-eth/my-rust-std against try#c86ec274072509d26d0ee52682a0c94ed012ed89 for pr-153027
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackG-eth%2Fmy-rust-std" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JackG-eth/my-rust-std
[INFO] finished tweaking git repo https://github.com/JackG-eth/my-rust-std
[INFO] tweaked toml for git repo https://github.com/JackG-eth/my-rust-std written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JackG-eth/my-rust-std on toolchain c86ec274072509d26d0ee52682a0c94ed012ed89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JackG-eth/my-rust-std 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" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] beaa610a73eab1046ea104033291fa36ce282d601a3e69ee892fde2c8a79ea88
[INFO] running `Command { std: "docker" "start" "-a" "beaa610a73eab1046ea104033291fa36ce282d601a3e69ee892fde2c8a79ea88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "beaa610a73eab1046ea104033291fa36ce282d601a3e69ee892fde2c8a79ea88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beaa610a73eab1046ea104033291fa36ce282d601a3e69ee892fde2c8a79ea88", kill_on_drop: false }`
[INFO] [stdout] beaa610a73eab1046ea104033291fa36ce282d601a3e69ee892fde2c8a79ea88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41fd7a5671b46586581a7a460512a5262a38bbba407fd14f6b425af86c0f7123
[INFO] running `Command { std: "docker" "start" "-a" "41fd7a5671b46586581a7a460512a5262a38bbba407fd14f6b425af86c0f7123", kill_on_drop: false }`
[INFO] [stderr]     Checking my-std v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rc::Weak`
[INFO] [stdout]  --> src/my_arc.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     rc::Weak,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::btree_map::RangeMut` and `path::Iter`
[INFO] [stdout]  --> src/my_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::btree_map::RangeMut,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 7 |     path::Iter,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::VecDeque`
[INFO] [stdout]  --> src/my_deque.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     collections::VecDeque,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rc::Weak`
[INFO] [stdout]  --> src/my_arc.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     rc::Weak,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::btree_map::RangeMut` and `path::Iter`
[INFO] [stdout]  --> src/my_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::btree_map::RangeMut,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 7 |     path::Iter,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::VecDeque`
[INFO] [stdout]  --> src/my_deque.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     collections::VecDeque,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InnerArc` is never constructed
[INFO] [stdout]  --> src/my_arc.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct InnerArc<T> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/my_arc.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T> InnerArc<T> {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] 15 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyArc` is never constructed
[INFO] [stdout]   --> src/my_arc.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct MyArc<T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyWeak` is never constructed
[INFO] [stdout]   --> src/my_arc.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct MyWeak<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `upgrade` is never used
[INFO] [stdout]   --> src/my_arc.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl<T> MyWeak<T> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 33 |     fn upgrade(&self) -> Option<MyArc<T>> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/my_arc.rs:55:8
[INFO] [stdout]     |
[INFO] [stdout]  54 | impl<T> MyArc<T> {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout]  55 |     fn new(value: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  60 |     fn get_strong_count(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  68 |     fn get_weak_count(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  77 |     fn get_mut_ref(&mut self) -> Option<&mut T> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  87 |     fn get_value_ref(&self) -> &T {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  91 |     fn try_unwrap(self) -> Result<T, Self> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     fn downgrade(&self) -> MyWeak<T> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InnerRc` is never constructed
[INFO] [stdout]  --> src/my_rc.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct InnerRc<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_count`, and `get_ref` are never used
[INFO] [stdout]   --> src/my_rc.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<T> InnerRc<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout]  9 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn get_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn get_ref(&self) -> &T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyRc` is never constructed
[INFO] [stdout]   --> src/my_rc.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct MyRc<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `try_unwrap`, `get_count`, `get_value_ref`, and `get_mut_ref` are never used
[INFO] [stdout]   --> src/my_rc.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl<T> MyRc<T> {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 30 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn try_unwrap(self) -> Result<T, Self> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn get_count(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn get_value_ref(&self) -> &T {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn get_mut_ref(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop`, `get_len`, `get_capacity`, `insert`, and `remove` are never used
[INFO] [stdout]    --> src/my_vec.rs:49:8
[INFO] [stdout]     |
[INFO] [stdout]  32 | impl<T> MyVec<T> {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  49 |     fn pop(&mut self) -> Option<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  78 |     fn get_len(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  82 |     fn get_capacity(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  94 |     fn insert(&mut self, index: usize, value: T) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 105 |     fn remove(&mut self, index: usize) -> T {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `write_pos`, `remove_pos`, and `read_last` are never used
[INFO] [stdout]    --> src/my_vec.rs:347:8
[INFO] [stdout]     |
[INFO] [stdout] 312 | impl<T> RawVec<T> {
[INFO] [stdout]     | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 347 |     fn write_pos(&mut self, index: usize, value: T, len: usize) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 363 |     fn remove_pos(&mut self, index: usize, len: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 377 |     fn read_last(&self, len: usize) -> T {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/my_deque.rs:97:12
[INFO] [stdout]     |
[INFO] [stdout]  65 | impl<T> MyDeque<T> {
[INFO] [stdout]     | ------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  97 |     pub fn push_front(&mut self, value: T) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn pop_back(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |     pub fn pop_front(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     pub fn peek_back(&self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 139 |     pub fn peek_front(&self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 151 |     pub fn capacity(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 155 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 159 |     pub fn is_full(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 173 |     pub fn get_mut(&mut self, index: usize) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 182 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 192 |     pub fn contains(&self, value: &T) -> bool
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `read`, `read_mut`, and `drop_index` are never used
[INFO] [stdout]    --> src/my_deque.rs:320:8
[INFO] [stdout]     |
[INFO] [stdout] 222 | impl<T> RawVec<T> {
[INFO] [stdout]     | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 320 |     fn read(&self, index: usize) -> T {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 324 |     fn read_mut(&mut self, index: usize) -> &mut T {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 332 |     fn drop_index(&mut self, index: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/my_linked_list.rs:169:17
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn iter(&self) -> Iter<T> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/my_linked_list.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[INFO] [stdout]     |                     ^^^^^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/my_arc.rs:265:17
[INFO] [stdout]     |
[INFO] [stdout] 265 |             let c = b.clone();
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rc2`
[INFO] [stdout]    --> src/my_arc.rs:285:13
[INFO] [stdout]     |
[INFO] [stdout] 285 |         let rc2 = rc.clone();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rc2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/my_rc.rs:135:17
[INFO] [stdout]     |
[INFO] [stdout] 135 |             let c = b.clone();
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rc2`
[INFO] [stdout]    --> src/my_rc.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let rc2 = rc.clone();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rc2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_count` and `get_ref` are never used
[INFO] [stdout]   --> src/my_rc.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<T> InnerRc<T> {
[INFO] [stdout]    | ------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn get_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn get_ref(&self) -> &T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `try_unwrap` is never used
[INFO] [stdout]   --> src/my_rc.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl<T> MyRc<T> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn try_unwrap(self) -> Result<T, Self> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `capacity`, `is_full`, and `get_mut` are never used
[INFO] [stdout]    --> src/my_deque.rs:151:12
[INFO] [stdout]     |
[INFO] [stdout]  65 | impl<T> MyDeque<T> {
[INFO] [stdout]     | ------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 151 |     pub fn capacity(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 159 |     pub fn is_full(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 173 |     pub fn get_mut(&mut self, index: usize) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_mut` is never used
[INFO] [stdout]    --> src/my_deque.rs:324:8
[INFO] [stdout]     |
[INFO] [stdout] 222 | impl<T> RawVec<T> {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 324 |     fn read_mut(&mut self, index: usize) -> &mut T {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/my_linked_list.rs:169:17
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn iter(&self) -> Iter<T> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/my_linked_list.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[INFO] [stdout]     |                     ^^^^^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "41fd7a5671b46586581a7a460512a5262a38bbba407fd14f6b425af86c0f7123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41fd7a5671b46586581a7a460512a5262a38bbba407fd14f6b425af86c0f7123", kill_on_drop: false }`
[INFO] [stdout] 41fd7a5671b46586581a7a460512a5262a38bbba407fd14f6b425af86c0f7123
