[INFO] cloning repository https://github.com/modulitos/CtCI-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/modulitos/CtCI-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2FCtCI-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2FCtCI-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8bbaa49c3eca43a77cf1a2cea1b6f98071ad2c78
[INFO] checking modulitos/CtCI-rust against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2FCtCI-rust" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/modulitos/CtCI-rust on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/modulitos/CtCI-rust
[INFO] finished tweaking git repo https://github.com/modulitos/CtCI-rust
[INFO] tweaked toml for git repo https://github.com/modulitos/CtCI-rust written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/modulitos/CtCI-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.60
[INFO] [stderr]   Downloaded getrandom v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "f7e796b4dd6520bf6b016d3c5c3dd5f83f965df48fd71257c76cc8ad39279e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7e796b4dd6520bf6b016d3c5c3dd5f83f965df48fd71257c76cc8ad39279e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7e796b4dd6520bf6b016d3c5c3dd5f83f965df48fd71257c76cc8ad39279e79", kill_on_drop: false }`
[INFO] [stdout] f7e796b4dd6520bf6b016d3c5c3dd5f83f965df48fd71257c76cc8ad39279e79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 729bc632428a79cafb4342966238cdb859e3098c41ee7548dd7a451a402bf597
[INFO] running `Command { std: "docker" "start" "-a" "729bc632428a79cafb4342966238cdb859e3098c41ee7548dd7a451a402bf597", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking getrandom v0.1.7
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling derive_more v0.15.0
[INFO] [stderr]     Checking rust-solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/linked_list/second.rs:11:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub type Link<T> = Option<(Box<Node<T>>)>;
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::List`
[INFO] [stdout]    --> src/linked_list/second.rs:167:9
[INFO] [stdout]     |
[INFO] [stdout] 167 |     use super::List;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/linked_list/third.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/linked_list/fifth.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/linked_list/refcell_singly.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/stack.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/binary_search_tree.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Ord`, `Ordering`
[INFO] [stdout]  --> src/graph.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/graph.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/binary_tree.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/binary_tree_refcell.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/binary_search_tree_refcell.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/linked_list/second.rs:11:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub type Link<T> = Option<(Box<Node<T>>)>;
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/linked_list/third.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/linked_list/fifth.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Ord`, `Ordering`
[INFO] [stdout]  --> src/graph.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/linked_list/second.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_iter`
[INFO] [stdout]   --> src/linked_list/second.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn into_iter(self) -> IntoIter<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]   --> src/linked_list/second.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn iter(&self) -> Iter<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter_mut`
[INFO] [stdout]   --> src/linked_list/second.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/linked_list/second.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub fn push(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]    --> src/linked_list/second.rs:119:12
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_mut`
[INFO] [stdout]    --> src/linked_list/second.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/linked_list/third.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `append`
[INFO] [stdout]   --> src/linked_list/third.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn append(&mut self, elem: T) -> Self {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/linked_list/third.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn tail(&self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `head`
[INFO] [stdout]   --> src/linked_list/third.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn head(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]    --> src/linked_list/third.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/linked_list/fourth.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn new(elem: T) -> Rc<RefCell<Self>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/linked_list/fourth.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_front`
[INFO] [stdout]   --> src/linked_list/fourth.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn push_front(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_front`
[INFO] [stdout]   --> src/linked_list/fourth.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn peek_front(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `prev`
[INFO] [stdout]   --> src/linked_list/brandon.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     prev: Option<NodeRef<T>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/linked_list/brandon.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn tail(node: &NodeRef<T>) -> Option<NodeRef<T>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/linked_list/brandon.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn remove(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/linked_list/brandon.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `append`
[INFO] [stdout]   --> src/linked_list/brandon.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn append(&mut self, new_value: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/linked_list/brandon.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn tail(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]   --> src/linked_list/brandon.rs:96:8
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn iter(&self) -> Iter<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `list_has_duplicates`
[INFO] [stdout]    --> src/linked_list/brandon.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn list_has_duplicates(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_duplicates`
[INFO] [stdout]    --> src/linked_list/brandon.rs:117:8
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn remove_duplicates(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]    --> src/linked_list/brandon.rs:228:4
[INFO] [stdout]     |
[INFO] [stdout] 228 | fn main() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/linked_list/fifth.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/linked_list/fifth.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn push(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/linked_list/fifth.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 41 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stack.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let mut s: Stack<u64> = Stack::new();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `list_has_duplicates`
[INFO] [stdout]    --> src/linked_list/brandon.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn list_has_duplicates(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]    --> src/linked_list/brandon.rs:228:4
[INFO] [stdout]     |
[INFO] [stdout] 228 | fn main() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TreeNode`
[INFO] [stdout]  --> src/bin/ch4-p5_validate-bst.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 | use cracking::{BinarySearchTree, Tree, TreeNode};
[INFO] [stdout]   |                                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch4-p5_validate-bst.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch4_p5_validate_bst`
[INFO] [stdout]    --> src/bin/ch4-p5_validate-bst.rs:8:1
[INFO] [stdout]     |
[INFO] [stdout] 8   | / use cracking::{BinarySearchTree, Tree, TreeNode};
[INFO] [stdout] 9   | |
[INFO] [stdout] 10  | | trait ValidateBST<T> {
[INFO] [stdout] 11  | |     fn validate_bst(&self) -> bool;
[INFO] [stdout] ...   |
[INFO] [stdout] 192 | |     }
[INFO] [stdout] 193 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch4-p5_validate-bst.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-solutions` due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch7_p6_jigsaw`
[INFO] [stdout]    --> src/bin/ch7-p6_jigsaw.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout] 6   | / use rand::distributions::Uniform;
[INFO] [stdout] 7   | | use rand::prelude::*;
[INFO] [stdout] 8   | | use std::cmp::PartialEq;
[INFO] [stdout] 9   | | use std::collections::HashMap;
[INFO] [stdout] ...   |
[INFO] [stdout] 441 | |     assert_eq!(p, solved);
[INFO] [stdout] 442 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch7-p6_jigsaw.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch5_p8_draw_line`
[INFO] [stdout]    --> src/bin/ch5-p8_draw-line.rs:13:1
[INFO] [stdout]     |
[INFO] [stdout] 13  | / const MAX: u8 = std::u8::MAX;
[INFO] [stdout] 14  | | use std::convert::TryFrom;
[INFO] [stdout] 15  | |
[INFO] [stdout] 16  | | // draws a line from (x1, x2) (inclusive), at row y.
[INFO] [stdout] ...   |
[INFO] [stdout] 195 | |     assert_eq!(screen, screen_result);
[INFO] [stdout] 196 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch5-p8_draw-line.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `from`
[INFO] [stdout]   --> src/bin/ch7-p2_call-center.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     from: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeNode as Node`, `BinaryTree`
[INFO] [stdout]   --> src/bin/ch4-p10_check-subtree.rs:11:31
[INFO] [stdout]    |
[INFO] [stdout] 11 | use cracking::{BTree as Tree, BTreeNode as Node, BinaryTree};
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch4-p10_check-subtree.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch4_p10_check_subtree`
[INFO] [stdout]    --> src/bin/ch4-p10_check-subtree.rs:11:1
[INFO] [stdout]     |
[INFO] [stdout] 11  | / use cracking::{BTree as Tree, BTreeNode as Node, BinaryTree};
[INFO] [stdout] 12  | |
[INFO] [stdout] 13  | | // Uses a string comparison approach - serialize the trees into
[INFO] [stdout] 14  | | // strings, then check whether the substree's string is contained
[INFO] [stdout] ...   |
[INFO] [stdout] 124 | |     }
[INFO] [stdout] 125 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch4-p10_check-subtree.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch3-p4_queue-via-stacks.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch3_p4_queue_via_stacks`
[INFO] [stdout]   --> src/bin/ch3-p4_queue-via-stacks.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / use cracking::Stack;
[INFO] [stdout] 5  | |
[INFO] [stdout] 6  | | struct MyQueue<T> {
[INFO] [stdout] 7  | |     incoming: Stack<T>,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `src/bin/ch3-p4_queue-via-stacks.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Node`
[INFO] [stdout]   --> src/bin/ch2-p8_loop-detection.rs:10:28
[INFO] [stdout]    |
[INFO] [stdout] 10 | use cracking::{HashedNode, Node, NodeRef, SinglyLinkedList as LinkedList};
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/bin/ch2-p8_loop-detection.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch2-p8_loop-detection.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch2_p8_loop_detection`
[INFO] [stdout]    --> src/bin/ch2-p8_loop-detection.rs:9:1
[INFO] [stdout]     |
[INFO] [stdout] 9   | / extern crate cracking;
[INFO] [stdout] 10  | | use cracking::{HashedNode, Node, NodeRef, SinglyLinkedList as LinkedList};
[INFO] [stdout] 11  | |
[INFO] [stdout] 12  | | use std::collections::HashSet;
[INFO] [stdout] ...   |
[INFO] [stdout] 165 | |     }
[INFO] [stdout] 166 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch2-p8_loop-detection.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch4-p2_minimal-tree.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch4_p2_minimal_tree`
[INFO] [stdout]    --> src/bin/ch4-p2_minimal-tree.rs:5:1
[INFO] [stdout]     |
[INFO] [stdout] 5   | / use cracking::BinarySearchTree;
[INFO] [stdout] 6   | | use std::collections::VecDeque;
[INFO] [stdout] 7   | |
[INFO] [stdout] 8   | | trait MinimalTree<T> {
[INFO] [stdout] ...   |
[INFO] [stdout] 101 | |     }
[INFO] [stdout] 102 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch4-p2_minimal-tree.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch2-p5_sum-lists.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `map` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/bin/ch1-p3_check-permutation.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         if let Some(count) = map.get(&c) {
[INFO] [stdout]    |                              --- immutable borrow occurs here
[INFO] [stdout] 15 |             map.insert(c, count + 1);
[INFO] [stdout]    |             ^^^           ----- immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch4-p3_list-of-depths.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch4_p3_list_of_depths`
[INFO] [stdout]    --> src/bin/ch4-p3_list-of-depths.rs:5:1
[INFO] [stdout]     |
[INFO] [stdout] 5   | / use cracking::{BinarySearchTree, Tree};
[INFO] [stdout] 6   | |
[INFO] [stdout] 7   | | trait ListOfDepths<T> {
[INFO] [stdout] 8   | |     fn get_lists(&self) -> Vec<Vec<T>>;
[INFO] [stdout] ...   |
[INFO] [stdout] 167 | |     }
[INFO] [stdout] 168 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch4-p3_list-of-depths.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch3-p2_stack-with-min.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Node`
[INFO] [stdout]   --> src/bin/ch2-p7_check-intersection.rs:11:48
[INFO] [stdout]    |
[INFO] [stdout] 11 | use cracking::{SinglyLinkedList as LinkedList, Node};
[INFO] [stdout]    |                                                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/bin/ch2-p7_check-intersection.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/ch2-p7_check-intersection.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch2_p7_check_intersection`
[INFO] [stdout]    --> src/bin/ch2-p7_check-intersection.rs:10:1
[INFO] [stdout]     |
[INFO] [stdout] 10  | / extern crate cracking;
[INFO] [stdout] 11  | | use cracking::{SinglyLinkedList as LinkedList, Node};
[INFO] [stdout] 12  | |
[INFO] [stdout] 13  | | use std::rc::Rc;
[INFO] [stdout] ...   |
[INFO] [stdout] 145 | |     }
[INFO] [stdout] 146 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch2-p7_check-intersection.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch3_p2_stack_with_min`
[INFO] [stdout]    --> src/bin/ch3-p2_stack-with-min.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | / use cracking::Stack;
[INFO] [stdout] 5   | |
[INFO] [stdout] 6   | | struct MinStack<T> {
[INFO] [stdout] 7   | |     stack: Stack<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 102 | |     }
[INFO] [stdout] 103 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch3-p2_stack-with-min.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RCBTreeNode as Node`
[INFO] [stdout]  --> src/bin/ch4-p8_first-common-ancestor.rs:6:33
[INFO] [stdout]   |
[INFO] [stdout] 6 | use cracking::{RCBTree as Tree, RCBTreeNode as Node, RCBinaryTree as BinaryTree};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/bin/ch4-p8_first-common-ancestor.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `map` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/bin/ch1-p3_check-permutation.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         if let Some(count) = map.get(&c) {
[INFO] [stdout]    |                              --- immutable borrow occurs here
[INFO] [stdout] 15 |             map.insert(c, count + 1);
[INFO] [stdout]    |             ^^^           ----- immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ch4_p8_first_common_ancestor`
[INFO] [stdout]    --> src/bin/ch4-p8_first-common-ancestor.rs:6:1
[INFO] [stdout]     |
[INFO] [stdout] 6   | / use cracking::{RCBTree as Tree, RCBTreeNode as Node, RCBinaryTree as BinaryTree};
[INFO] [stdout] 7   | | use std::rc::Rc;
[INFO] [stdout] 8   | |
[INFO] [stdout] 9   | | trait FirstCommonAncestor<T> {
[INFO] [stdout] ...   |
[INFO] [stdout] 242 | |     }
[INFO] [stdout] 243 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/bin/ch4-p8_first-common-ancestor.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `urlify_2`
[INFO] [stdout]   --> src/bin/ch1-p2_urlify.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn urlify_2(url: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_middle_node`
[INFO] [stdout]   --> src/bin/ch2-p3_delete-middle-node.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn delete_middle_node(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "729bc632428a79cafb4342966238cdb859e3098c41ee7548dd7a451a402bf597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "729bc632428a79cafb4342966238cdb859e3098c41ee7548dd7a451a402bf597", kill_on_drop: false }`
[INFO] [stdout] 729bc632428a79cafb4342966238cdb859e3098c41ee7548dd7a451a402bf597