[INFO] cloning repository https://github.com/system125/Doubly_linked_list_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/system125/Doubly_linked_list_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsystem125%2FDoubly_linked_list_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsystem125%2FDoubly_linked_list_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 479db7c23e7658eb49bb9f435d5930eb298305c5
[INFO] testing system125/Doubly_linked_list_rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsystem125%2FDoubly_linked_list_rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/system125/Doubly_linked_list_rust
[INFO] finished tweaking git repo https://github.com/system125/Doubly_linked_list_rust
[INFO] tweaked toml for git repo https://github.com/system125/Doubly_linked_list_rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/system125/Doubly_linked_list_rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/system125/Doubly_linked_list_rust 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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f8a25109838d1dade4a43ca85fa3d32345ccdc233d4989909f64086859567bb
[INFO] running `Command { std: "docker" "start" "-a" "4f8a25109838d1dade4a43ca85fa3d32345ccdc233d4989909f64086859567bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f8a25109838d1dade4a43ca85fa3d32345ccdc233d4989909f64086859567bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f8a25109838d1dade4a43ca85fa3d32345ccdc233d4989909f64086859567bb", kill_on_drop: false }`
[INFO] [stdout] 4f8a25109838d1dade4a43ca85fa3d32345ccdc233d4989909f64086859567bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b44c9f362ae1c2d7e8f567e40299a4d00cab30b51f3a529c4142fcb3ee312d1
[INFO] running `Command { std: "docker" "start" "-a" "6b44c9f362ae1c2d7e8f567e40299a4d00cab30b51f3a529c4142fcb3ee312d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling doubly_linked_list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Ref` and `Weak`
[INFO] [stdout]  --> src/doubly_linked_list/doubly_linked_list.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |         Ref, 
[INFO] [stdout]   |         ^^^
[INFO] [stdout] 4 |         RefCell}, rc::{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: type `Doubly_Linked_List` should have an upper camel case name
[INFO] [stdout]   --> src/doubly_linked_list/doubly_linked_list.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Doubly_Linked_List<T: Default + Copy + Clone> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoublyLinkedList`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `nextNodeType` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/node.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type nextNodeType<T> = Option<Rc<RefCell<Node<T>>>>;
[INFO] [stdout]   |          ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `NextNodeType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `prevNodeType` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/node.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type prevNodeType<T> = Option<Weak<RefCell<Node<T>>>>;
[INFO] [stdout]   |          ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PrevNodeType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Reverse_Iterator` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/reversed_linked_list_iterator.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Reverse_Iterator<T: Default> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ReverseIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Doubly_Linked_List_Iterator` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/linked_list_iterator.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Doubly_Linked_List_Iterator<T:Default> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoublyLinkedListIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/doubly_linked_list/test_doubly_linked_list.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::doubly_linked_list::{self, Doubly_Linked_List};
[INFO] [stdout]   |                                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/doubly_linked_list/doubly_linked_list.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 80 | /         loop {
[INFO] [stdout] 81 | |             
[INFO] [stdout] 82 | |             if current_count == index {
[INFO] [stdout] 83 | |                 return Some(current_node);
[INFO] [stdout] ...  |
[INFO] [stdout] 93 | |             current_count += 1;
[INFO] [stdout] 94 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 95 |
[INFO] [stdout] 96 |           None
[INFO] [stdout]    |           ^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/doubly_linked_list/doubly_linked_list.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 173 | /         loop {
[INFO] [stdout] 174 | |             
[INFO] [stdout] 175 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 176 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/doubly_linked_list/doubly_linked_list.rs:45:29
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 if let Some(mut tail_ptr) = tail_ptr.upgrade(){
[INFO] [stdout]    |                             ----^^^^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_ptr`
[INFO] [stdout]    --> src/doubly_linked_list/doubly_linked_list.rs:170:13
[INFO] [stdout]     |
[INFO] [stdout] 170 |         let current_ptr = head_ptr;
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_ptr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_count`
[INFO] [stdout]    --> src/doubly_linked_list/doubly_linked_list.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let current_count = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let mut prevNode = currentNode
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_linked_list` is never used
[INFO] [stdout]  --> src/doubly_linked_list/test_doubly_linked_list.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn create_linked_list()-> Doubly_Linked_List<i32>{
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `currentNode` should have a snake case name
[INFO] [stdout]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let currentNode = self.current.take()?.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `current_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `prevNode` should have a snake case name
[INFO] [stdout]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let mut prevNode = currentNode
[INFO] [stdout]    |                 ^^^^^^^^ help: convert the identifier to snake case: `prev_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `currentNode` should have a snake case name
[INFO] [stdout]   --> src/doubly_linked_list/linked_list_iterator.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let currentNode = self
[INFO] [stdout]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `current_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "6b44c9f362ae1c2d7e8f567e40299a4d00cab30b51f3a529c4142fcb3ee312d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b44c9f362ae1c2d7e8f567e40299a4d00cab30b51f3a529c4142fcb3ee312d1", kill_on_drop: false }`
[INFO] [stdout] 6b44c9f362ae1c2d7e8f567e40299a4d00cab30b51f3a529c4142fcb3ee312d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0f9fe54685005581f129dfbfef7357f8f420b7e7f9446002f53163394f7045a
[INFO] running `Command { std: "docker" "start" "-a" "b0f9fe54685005581f129dfbfef7357f8f420b7e7f9446002f53163394f7045a", kill_on_drop: false }`
[INFO] [stderr]    Compiling doubly_linked_list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Ref` and `Weak`
[INFO] [stdout]  --> src/doubly_linked_list/doubly_linked_list.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |         Ref, 
[INFO] [stdout]   |         ^^^
[INFO] [stdout] 4 |         RefCell}, rc::{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: type `Doubly_Linked_List` should have an upper camel case name
[INFO] [stdout]   --> src/doubly_linked_list/doubly_linked_list.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Doubly_Linked_List<T: Default + Copy + Clone> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoublyLinkedList`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `nextNodeType` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/node.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type nextNodeType<T> = Option<Rc<RefCell<Node<T>>>>;
[INFO] [stdout]   |          ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `NextNodeType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `prevNodeType` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/node.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type prevNodeType<T> = Option<Weak<RefCell<Node<T>>>>;
[INFO] [stdout]   |          ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PrevNodeType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Reverse_Iterator` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/reversed_linked_list_iterator.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Reverse_Iterator<T: Default> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ReverseIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Doubly_Linked_List_Iterator` should have an upper camel case name
[INFO] [stdout]  --> src/doubly_linked_list/linked_list_iterator.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Doubly_Linked_List_Iterator<T:Default> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoublyLinkedListIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/doubly_linked_list/test_doubly_linked_list.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::doubly_linked_list::{self, Doubly_Linked_List};
[INFO] [stdout]   |                                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/doubly_linked_list/doubly_linked_list.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 80 | /         loop {
[INFO] [stdout] 81 | |             
[INFO] [stdout] 82 | |             if current_count == index {
[INFO] [stdout] 83 | |                 return Some(current_node);
[INFO] [stdout] ...  |
[INFO] [stdout] 93 | |             current_count += 1;
[INFO] [stdout] 94 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 95 |
[INFO] [stdout] 96 |           None
[INFO] [stdout]    |           ^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/doubly_linked_list/doubly_linked_list.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 173 | /         loop {
[INFO] [stdout] 174 | |             
[INFO] [stdout] 175 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 176 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/doubly_linked_list/doubly_linked_list.rs:45:29
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 if let Some(mut tail_ptr) = tail_ptr.upgrade(){
[INFO] [stdout]    |                             ----^^^^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_ptr`
[INFO] [stdout]    --> src/doubly_linked_list/doubly_linked_list.rs:170:13
[INFO] [stdout]     |
[INFO] [stdout] 170 |         let current_ptr = head_ptr;
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_ptr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_count`
[INFO] [stdout]    --> src/doubly_linked_list/doubly_linked_list.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let current_count = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let mut prevNode = currentNode
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/doubly_linked_list/test_doubly_linked_list.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut d_link_list = create_linked_list();
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/doubly_linked_list/test_doubly_linked_list.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut d_link_list = create_linked_list();
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_link_list`
[INFO] [stdout]   --> src/doubly_linked_list/test_doubly_linked_list.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut d_link_list = create_linked_list();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_d_link_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `currentNode` should have a snake case name
[INFO] [stdout]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let currentNode = self.current.take()?.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `current_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `prevNode` should have a snake case name
[INFO] [stdout]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let mut prevNode = currentNode
[INFO] [stdout]    |                 ^^^^^^^^ help: convert the identifier to snake case: `prev_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `currentNode` should have a snake case name
[INFO] [stdout]   --> src/doubly_linked_list/linked_list_iterator.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let currentNode = self
[INFO] [stdout]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `current_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/doubly_linked_list/test_doubly_linked_list.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     doubly_linked_list.insert_at(0, 100);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let _ = doubly_linked_list.insert_at(0, 100);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/doubly_linked_list/test_doubly_linked_list.rs:84:5
[INFO] [stdout]    |
[INFO] [stdout] 84 |     doubly_linked_list.insert_at(3, 100);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let _ = doubly_linked_list.insert_at(3, 100);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "b0f9fe54685005581f129dfbfef7357f8f420b7e7f9446002f53163394f7045a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0f9fe54685005581f129dfbfef7357f8f420b7e7f9446002f53163394f7045a", kill_on_drop: false }`
[INFO] [stdout] b0f9fe54685005581f129dfbfef7357f8f420b7e7f9446002f53163394f7045a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b263d3403ec4a5579f305c109ab9edb4f37da27ce4c6f303897a9b84d8e9eb96
[INFO] running `Command { std: "docker" "start" "-a" "b263d3403ec4a5579f305c109ab9edb4f37da27ce4c6f303897a9b84d8e9eb96", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Ref` and `Weak`
[INFO] [stderr]  --> src/doubly_linked_list/doubly_linked_list.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |         Ref, 
[INFO] [stderr]   |         ^^^
[INFO] [stderr] 4 |         RefCell}, rc::{Rc, Weak} 
[INFO] [stderr]   |                            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Doubly_Linked_List` should have an upper camel case name
[INFO] [stderr]   --> src/doubly_linked_list/doubly_linked_list.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct Doubly_Linked_List<T: Default + Copy + Clone> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoublyLinkedList`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `nextNodeType` should have an upper camel case name
[INFO] [stderr]  --> src/doubly_linked_list/node.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub type nextNodeType<T> = Option<Rc<RefCell<Node<T>>>>;
[INFO] [stderr]   |          ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `NextNodeType`
[INFO] [stderr] 
[INFO] [stderr] warning: type `prevNodeType` should have an upper camel case name
[INFO] [stderr]  --> src/doubly_linked_list/node.rs:6:10
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub type prevNodeType<T> = Option<Weak<RefCell<Node<T>>>>;
[INFO] [stderr]   |          ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PrevNodeType`
[INFO] [stderr] 
[INFO] [stderr] warning: type `Reverse_Iterator` should have an upper camel case name
[INFO] [stderr]  --> src/doubly_linked_list/reversed_linked_list_iterator.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Reverse_Iterator<T: Default> {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ReverseIterator`
[INFO] [stderr] 
[INFO] [stderr] warning: type `Doubly_Linked_List_Iterator` should have an upper camel case name
[INFO] [stderr]  --> src/doubly_linked_list/linked_list_iterator.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Doubly_Linked_List_Iterator<T:Default> {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoublyLinkedListIterator`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/doubly_linked_list/test_doubly_linked_list.rs:1:33
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::doubly_linked_list::{self, Doubly_Linked_List};
[INFO] [stderr]   |                                 ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/doubly_linked_list/doubly_linked_list.rs:96:9
[INFO] [stderr]    |
[INFO] [stderr] 80 | /         loop {
[INFO] [stderr] 81 | |             
[INFO] [stderr] 82 | |             if current_count == index {
[INFO] [stderr] 83 | |                 return Some(current_node);
[INFO] [stderr] ...  |
[INFO] [stderr] 93 | |             current_count += 1;
[INFO] [stderr] 94 | |         }
[INFO] [stderr]    | |_________- any code following this expression is unreachable
[INFO] [stderr] 95 |
[INFO] [stderr] 96 |           None
[INFO] [stderr]    |           ^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/doubly_linked_list/doubly_linked_list.rs:176:9
[INFO] [stderr]     |
[INFO] [stderr] 173 | /         loop {
[INFO] [stderr] 174 | |             
[INFO] [stderr] 175 | |         }
[INFO] [stderr]     | |_________- any code following this expression is unreachable
[INFO] [stderr] 176 |           None
[INFO] [stderr]     |           ^^^^ unreachable expression
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/doubly_linked_list/doubly_linked_list.rs:45:29
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 if let Some(mut tail_ptr) = tail_ptr.upgrade(){
[INFO] [stderr]    |                             ----^^^^^^^^
[INFO] [stderr]    |                             |
[INFO] [stderr]    |                             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `current_ptr`
[INFO] [stderr]    --> src/doubly_linked_list/doubly_linked_list.rs:170:13
[INFO] [stderr]     |
[INFO] [stderr] 170 |         let current_ptr = head_ptr;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_ptr`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `current_count`
[INFO] [stderr]    --> src/doubly_linked_list/doubly_linked_list.rs:171:13
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let current_count = 0;
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_count`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |         let mut prevNode = currentNode
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/doubly_linked_list/test_doubly_linked_list.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut d_link_list = create_linked_list();
[INFO] [stderr]    |         ----^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/doubly_linked_list/test_doubly_linked_list.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let mut d_link_list = create_linked_list();
[INFO] [stderr]    |         ----^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d_link_list`
[INFO] [stderr]   --> src/doubly_linked_list/test_doubly_linked_list.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let mut d_link_list = create_linked_list();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_d_link_list`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `currentNode` should have a snake case name
[INFO] [stderr]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let currentNode = self.current.take()?.clone();
[INFO] [stderr]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `current_node`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `prevNode` should have a snake case name
[INFO] [stderr]   --> src/doubly_linked_list/reversed_linked_list_iterator.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |         let mut prevNode = currentNode
[INFO] [stderr]    |                 ^^^^^^^^ help: convert the identifier to snake case: `prev_node`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `currentNode` should have a snake case name
[INFO] [stderr]   --> src/doubly_linked_list/linked_list_iterator.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let currentNode = self
[INFO] [stderr]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `current_node`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/doubly_linked_list/test_doubly_linked_list.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     doubly_linked_list.insert_at(0, 100);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 81 |     let _ = doubly_linked_list.insert_at(0, 100);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/doubly_linked_list/test_doubly_linked_list.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     doubly_linked_list.insert_at(3, 100);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 84 |     let _ = doubly_linked_list.insert_at(3, 100);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `doubly_linked_list` (bin "doubly_linked_list" test) generated 21 warnings (run `cargo fix --bin "doubly_linked_list" -p doubly_linked_list --tests` to apply 9 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/doubly_linked_list-68ac45d972142d1d)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test doubly_linked_list::test_doubly_linked_list::get_linked_list_item ... ok
[INFO] [stdout] test doubly_linked_list::test_doubly_linked_list::test_enque_deque ... ok
[INFO] [stdout] test doubly_linked_list::test_doubly_linked_list::reverse_iterator_test ... ok
[INFO] [stdout] test doubly_linked_list::test_doubly_linked_list::test_push_value ... ok
[INFO] [stdout] test doubly_linked_list::test_doubly_linked_list::test_insertion_d_linked_list ... ok
[INFO] [stdout] test doubly_linked_list::test_doubly_linked_list::insert_pop_at has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "b263d3403ec4a5579f305c109ab9edb4f37da27ce4c6f303897a9b84d8e9eb96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b263d3403ec4a5579f305c109ab9edb4f37da27ce4c6f303897a9b84d8e9eb96", kill_on_drop: false }`
[INFO] [stdout] b263d3403ec4a5579f305c109ab9edb4f37da27ce4c6f303897a9b84d8e9eb96
