[INFO] cloning repository https://github.com/tolumide-ng/coding-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tolumide-ng/coding-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f086f2c577d12dfbcf99f99bba55dae91f64d928
[INFO] testing tolumide-ng/coding-challenge against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tolumide-ng/coding-challenge on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tolumide-ng/coding-challenge
[INFO] finished tweaking git repo https://github.com/tolumide-ng/coding-challenge
[INFO] tweaked toml for git repo https://github.com/tolumide-ng/coding-challenge written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/tolumide-ng/coding-challenge already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f7d2951dac1d7043a894da4c4d44e8a97a2bd118457f84672df087d77053863
[INFO] running `Command { std: "docker" "start" "-a" "2f7d2951dac1d7043a894da4c4d44e8a97a2bd118457f84672df087d77053863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f7d2951dac1d7043a894da4c4d44e8a97a2bd118457f84672df087d77053863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f7d2951dac1d7043a894da4c4d44e8a97a2bd118457f84672df087d77053863", kill_on_drop: false }`
[INFO] [stdout] 2f7d2951dac1d7043a894da4c4d44e8a97a2bd118457f84672df087d77053863
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba0f8e46e814cc57a5ac04534ded4b0204441ac1fd543587d053811ef38b3e51
[INFO] running `Command { std: "docker" "start" "-a" "ba0f8e46e814cc57a5ac04534ded4b0204441ac1fd543587d053811ef38b3e51", kill_on_drop: false }`
[INFO] [stderr]    Compiling data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]    Compiling dynamic_pg v0.1.0 (/opt/rustwide/workdir/dynamic_pg)
[INFO] [stdout] warning: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let last = &store[store.len() -1];
[INFO] [stdout]    |                 ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     store.push(Building::new(last.end, last.end, 0));
[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: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stdout]    |                             ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stdout]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     mutable borrow occurs here
[INFO] [stdout]    |
[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: struct is never constructed: `Parenthesis`
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Parenthesis {}
[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: `generate_parenthesis`
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `backtrack`
[INFO] [stdout]   --> data_structures/src/recursion/generate_parenthesis.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn backtrack(
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling others v0.1.0 (/opt/rustwide/workdir/others)
[INFO] [stdout] warning: function is never used: `histogram_brute_force`
[INFO] [stdout]  --> others/src/the_algos/largest_rectangle_histogram.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub fn histogram_brute_force(heights: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_area`
[INFO] [stdout]   --> others/src/the_algos/largest_rectangle_histogram.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn calculate_area(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `histogram_stack_approach`
[INFO] [stdout]   --> others/src/the_algos/largest_rectangle_histogram.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn histogram_stack_approach(heights: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let last = &store[store.len() -1];
[INFO] [stdout]    |                 ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     store.push(Building::new(last.end, last.end, 0));
[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: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stdout]    |                             ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stdout]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     mutable borrow occurs here
[INFO] [stdout]    |
[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: struct is never constructed: `Parenthesis`
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Parenthesis {}
[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: `generate_parenthesis`
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `backtrack`
[INFO] [stdout]   --> data_structures/src/recursion/generate_parenthesis.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn backtrack(
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `Command { std: "docker" "inspect" "ba0f8e46e814cc57a5ac04534ded4b0204441ac1fd543587d053811ef38b3e51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba0f8e46e814cc57a5ac04534ded4b0204441ac1fd543587d053811ef38b3e51", kill_on_drop: false }`
[INFO] [stdout] ba0f8e46e814cc57a5ac04534ded4b0204441ac1fd543587d053811ef38b3e51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e29c542a55eb958cf43ec54a6b0126d5b186959580f9de919ebd3bc3e61f5aa
[INFO] running `Command { std: "docker" "start" "-a" "2e29c542a55eb958cf43ec54a6b0126d5b186959580f9de919ebd3bc3e61f5aa", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling dynamic_pg v0.1.0 (/opt/rustwide/workdir/dynamic_pg)
[INFO] [stdout] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let last = &store[store.len() -1];
[INFO] [stdout]    |                 ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     store.push(Building::new(last.end, last.end, 0));
[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] [stderr]    Compiling others v0.1.0 (/opt/rustwide/workdir/others)
[INFO] [stdout] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stdout]    |                             ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stdout]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     mutable borrow occurs here
[INFO] [stdout]    |
[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: struct is never constructed: `Parenthesis`
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Parenthesis {}
[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: `generate_parenthesis`
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `backtrack`
[INFO] [stdout]   --> data_structures/src/recursion/generate_parenthesis.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn backtrack(
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let last = &store[store.len() -1];
[INFO] [stdout]    |                 ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     store.push(Building::new(last.end, last.end, 0));
[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: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stdout]    |                             ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stdout]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     mutable borrow occurs here
[INFO] [stdout]    |
[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: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let last = &store[store.len() -1];
[INFO] [stdout]    |                 ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     store.push(Building::new(last.end, last.end, 0));
[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: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stdout]    |                             ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stdout]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     mutable borrow occurs here
[INFO] [stdout]    |
[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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 10.21s
[INFO] running `Command { std: "docker" "inspect" "2e29c542a55eb958cf43ec54a6b0126d5b186959580f9de919ebd3bc3e61f5aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e29c542a55eb958cf43ec54a6b0126d5b186959580f9de919ebd3bc3e61f5aa", kill_on_drop: false }`
[INFO] [stdout] 2e29c542a55eb958cf43ec54a6b0126d5b186959580f9de919ebd3bc3e61f5aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a7acdc4ee163baf24af62720be23e35e96665ccb41c77af9bbc1d62fa4507db6
[INFO] running `Command { std: "docker" "start" "-a" "a7acdc4ee163baf24af62720be23e35e96665ccb41c77af9bbc1d62fa4507db6", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `pn`
[INFO] [stderr]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stderr]     |
[INFO] [stderr] 108 |         (Some(pn), None) => false,
[INFO] [stderr]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qn`
[INFO] [stderr]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stderr]     |
[INFO] [stderr] 109 |         (None, Some(qn)) => false,
[INFO] [stderr]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     let last = &store[store.len() -1];
[INFO] [stderr]    |                 ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 86 |     store.push(Building::new(last.end, last.end, 0));
[INFO] [stderr]    |     ^^^^^                    -------- immutable borrow later used here
[INFO] [stderr]    |     |
[INFO] [stderr]    |     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stderr]    |                             ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stderr]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parenthesis`
[INFO] [stderr]  --> data_structures/src/recursion/generate_parenthesis.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Parenthesis {}
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `generate_parenthesis`
[INFO] [stderr]  --> data_structures/src/recursion/generate_parenthesis.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `backtrack`
[INFO] [stderr]   --> data_structures/src/recursion/generate_parenthesis.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn backtrack(
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pn`
[INFO] [stderr]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stderr]     |
[INFO] [stderr] 108 |         (Some(pn), None) => false,
[INFO] [stderr]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qn`
[INFO] [stderr]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stderr]     |
[INFO] [stderr] 109 |         (None, Some(qn)) => false,
[INFO] [stderr]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     let last = &store[store.len() -1];
[INFO] [stderr]    |                 ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 86 |     store.push(Building::new(last.end, last.end, 0));
[INFO] [stderr]    |     ^^^^^                    -------- immutable borrow later used here
[INFO] [stderr]    |     |
[INFO] [stderr]    |     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stderr]    |                             ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stderr]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pn`
[INFO] [stderr]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stderr]     |
[INFO] [stderr] 108 |         (Some(pn), None) => false,
[INFO] [stderr]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qn`
[INFO] [stderr]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stderr]     |
[INFO] [stderr] 109 |         (None, Some(qn)) => false,
[INFO] [stderr]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> data_structures/src/recursion/skyline_problem.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     let last = &store[store.len() -1];
[INFO] [stderr]    |                 ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 86 |     store.push(Building::new(last.end, last.end, 0));
[INFO] [stderr]    |     ^^^^^                    -------- immutable borrow later used here
[INFO] [stderr]    |     |
[INFO] [stderr]    |     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `store` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> data_structures/src/recursion/skyline_problem.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 let prev = &store[store.len() - 1];
[INFO] [stderr]    |                             ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 62 |                     store.push(Building::new(prev.end, prev.end, 0));
[INFO] [stderr]    |                     ^^^^^                    -------- immutable borrow later used here
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/data_structures-8066fd93bded54b9)
[INFO] [stdout] 
[INFO] [stdout] running 109 tests
[INFO] [stdout] test binary_tree::in_order_traversal::test_inorder_traversal::double_element_recursive_inorder_test ... ok
[INFO] [stdout] test binary_tree::lowest_common_ancestor::test_lca::gets_none_if_unavailable ... ok
[INFO] [stdout] test binary_tree::pre_order_traversal::test_preorder_traversal::iterative_preorder_test ... ok
[INFO] [stdout] test binary_tree::pre_order_traversal::test_preorder_traversal::recursive_preorder_test ... ok
[INFO] [stdout] test binary_tree::post_order_traversal::test_post_order_traversal::test_post_order_traversal ... ok
[INFO] [stdout] test binary_tree::priority_queue::test_min_priority::min_priority_order ... ok
[INFO] [stdout] test binary_tree::priority_queue::test_min_priority::test_change_priority ... ok
[INFO] [stdout] test binary_tree::serialize_deserialize::serialize_deserialize_tests::test_deserialize ... ok
[INFO] [stdout] test binary_tree::priority_queue::test_min_priority::min_priority_insertion ... ok
[INFO] [stdout] test binary_tree::priority_queue::test_min_priority::order_after_removal ... ok
[INFO] [stdout] test binary_tree::serialize_deserialize::serialize_deserialize_tests::test_serialize ... ok
[INFO] [stdout] test linked_lists::dnode::dtests::test_new_dnode_integer ... ok
[INFO] [stdout] test linked_lists::dnode::dtests::test_new_dnode_string ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_append_to_end ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_delete_nth_element ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::insert_elemenet ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_pop_head_multi_elem ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_get_nth_element ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_eight ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_first ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_pop_head_one_elem ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_fifth ... ok
[INFO] [stdout] test queues_stacks::circular_queue::test_queue::test_enqeue_rear ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_sixth ... ok
[INFO] [stdout] test queues_stacks::circular_queue::test_queue::test_queue_edge_case ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_third ... ok
[INFO] [stdout] test queues_stacks::daily_temperatures::test_daily_temps_cont::test_daily_temps ... ok
[INFO] [stdout] test linked_lists::linked_rcs::test_linked_rcs_mod::test_append_list ... ok
[INFO] [stdout] test linked_lists::linked_rcs::test_linked_rcs_mod::test_new_list ... ok
[INFO] [stdout] test linked_lists::linked_rcs::test_linked_rcs_mod::test_new_empty_list ... ok
[INFO] [stdout] test linked_lists::node::tests::test_new_node ... ok
[INFO] [stdout] test linked_lists::nth_from_last::test_nth_pointer::get_not_enough_nth_elem ... ok
[INFO] [stdout] test linked_lists::nth_from_last::test_nth_pointer::get_nth_elem_empty ... ok
[INFO] [stdout] test linked_lists::nth_from_last::test_nth_pointer::get_nth_elem_from_end ... ok
[INFO] [stdout] test linked_lists::odd_even_linked_lists::odd_even_linked_lists ... ok
[INFO] [stdout] test queues_stacks::decode_string::test_decode_string_cont::test_decode_string ... ok
[INFO] [stdout] test linked_lists::remove_linked_elements::remove_linked_elem ... ok
[INFO] [stdout] test queues_stacks::matrix_01::test_matrix_01_cont::test_matrix_01 ... ok
[INFO] [stdout] test linked_lists::single_ll::test_singly_ll_mod::singly_ll ... ok
[INFO] [stdout] test queues_stacks::min_stack::test_min_stack_cont::test_min_stack ... ok
[INFO] [stdout] test linked_lists::reversed_linked_lists::premo_wayne ... ok
[INFO] [stdout] test queues_stacks::moving_data_stream::test_circular_queue::test_cq ... ok
[INFO] [stdout] test queues_stacks::flood_fill::test_flood_fill_cont::test_flood_fill ... ok
[INFO] [stdout] test queues_stacks::walls_and_gates::test_walls::test_walls_and_gates ... ok
[INFO] [stdout] test queues_stacks::keys_and_rooms::can_visit_all_rooms_cont::test_keys_and_rooms ... ok
[INFO] [stdout] test queues_stacks::number_of_islands_bfs::test_islands_number_bfs_cont::test_island_number_bfs ... ok
[INFO] [stdout] test recursion::binary_tree_depth::test_max_depth_mod::test_max_depth_recursion ... ok
[INFO] [stdout] test recursion::climbing_stairs::test_climb_stairs_mod::test_climb_stairs ... ok
[INFO] [stdout] test recursion::combination::test_combination_mod::test_combination ... ok
[INFO] [stdout] test recursion::create_bst::test_create_bst_mod::test_creates_bst ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_new_empty_dlist ... ok
[INFO] [stdout] test binary_tree::level_order_traversal::breadth_first_search::single_elem_beadth_first_test ... ok
[INFO] [stdout] test binary_tree::in_order_traversal::test_inorder_traversal::one_element_recursive_inorder_test ... ok
[INFO] [stdout] test binary_tree::level_order_traversal::breadth_first_search::double_elem_breath_first_test ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_fourth ... ok
[INFO] [stdout] test queues_stacks::perfect_squares::test_perfect_squares_cont::test_perfect_squares ... ok
[INFO] [stdout] test queues_stacks::number_of_islands_dfs::test_islands_number::test_island_number ... ok
[INFO] [stdout] test queues_stacks::reverse_polish_notation::test_rpn_cont::test_rpn ... ok
[INFO] [stdout] test queues_stacks::stack_with_queues::test::test_stack_with_queue ... ok
[INFO] [stdout] test queues_stacks::target_sum::test_target_sum_cont::test_memoized_target_sum ... ok
[INFO] [stdout] test queues_stacks::target_sum::test_target_sum_cont::test_target_sum ... ok
[INFO] [stdout] test queues_stacks::valid_parentheses::test_valid_parentheses_cont::test_valid_parentheses ... ok
[INFO] [stdout] test queues_stacks::walls_and_gates_dfs::test_walls_dfs::test_walls_and_gates_dfs ... ok
[INFO] [stdout] test recursion::binary_tree_depth::test_max_depth_mod::test_max_depth_bfs ... ok
[INFO] [stdout] test queues_stacks::target_sum::test_target_sum_cont::test_dynamic_target_sum ... ok
[INFO] [stdout] test recursion::fibonacci::test_fibonacci_mod::test_tail_optimised_fibonacci ... ok
[INFO] [stdout] test recursion::generate_parenthesis::test_generate_parenthesis_mod::test_generate_parenthesis ... ok
[INFO] [stdout] test recursion::largest_histogram::test_largest_histogram_mod::test_largest_histogram ... ok
[INFO] [stdout] test linked_lists::doubly_linked_list::test_doubly_linked_list::test_pop_end_single_elem ... ok
[INFO] [stdout] test recursion::fibonacci::test_fibonacci_mod::test_fib_memo ... ok
[INFO] [stdout] test binary_tree::level_order_traversal::breadth_first_search::test_breadth_first_search ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_second ... ok
[INFO] [stdout] test recursion::letter_combinations::test_letter_comb_mod::test_letter_comb ... ok
[INFO] [stdout] test recursion::kth_symbol_in_grammar::test_kth_grammar_mod::test_kth_grammar ... ok
[INFO] [stdout] test recursion::merge_sort::test_merge_sort_mod::test_top_down_approach ... ok
[INFO] [stdout] test recursion::kth_largest_element::test_find_kth_largest_mod::test_find_kth_largest ... ok
[INFO] [stdout] test linked_lists::linked_palindrome::linked_palindrom_tests::is_palindrome_seventh ... ok
[INFO] [stdout] test recursion::fibonacci::test_fibonacci_mod::test_fib_fast ... ok
[INFO] [stdout] test binary_tree::in_order_traversal::test_inorder_traversal::recursive_inorder_test ... ok
[INFO] [stdout] test recursion::merge_two_sorted_lists::merge_two_sorted_list_mod::test_merge_lists ... ok
[INFO] [stdout] test recursion::merge_two_sorted_lists::merge_two_sorted_list_mod::test_merge_two_lists_approach_2 ... ok
[INFO] [stdout] test recursion::pascals_triangle::test_get_row_mod::test_get_row_one ... ok
[INFO] [stdout] test recursion::pascals_triangle::test_get_row_mod::test_get_row_inexistent ... ok
[INFO] [stdout] test recursion::pascals_triangle::test_get_row_mod::test_get_row_zero ... ok
[INFO] [stdout] test recursion::pow_x_n::test_pow_x_n_mod::test_pow_x_n ... ok
[INFO] [stdout] test recursion::permutations::test_permute_mod::test_emoty_permute ... ok
[INFO] [stdout] test recursion::pascals_triangle::test_get_row_mod::test_get_row ... ok
[INFO] [stdout] test recursion::sort_an_array::test_sort_array_mod::test_sort_array ... ok
[INFO] [stdout] test recursion::quick_sort::test_quick_sort ... ok
[INFO] [stdout] test recursion::n_queens::test_n_queens_mod::n_queens_test ... ok
[INFO] [stdout] test recursion::permutations::test_permute_mod::test_permute ... ok
[INFO] [stdout] test recursion::validate_bst::test_validate_bst_mod::test_invalid_bst ... ok
[INFO] [stdout] test recursion::merge_two_sorted_lists::merge_two_sorted_list_mod::test_short_list ... ok
[INFO] [stdout] test recursion::swap_node_pairs::test_swap_pairs_cont::test_swap_pairs ... ok
[INFO] [stdout] test recursion::reverse_string::test_reverse_string_cont::test_reverse_string ... ok
[INFO] [stdout] test recursion::search_2d_matrix::test_search_matrix_mod::test_search_matrix ... ok
[INFO] [stdout] test recursion::validate_bst::test_validate_bst_mod::test_multi_child ... ok
[INFO] [stdout] test recursion::validate_bst::test_validate_bst_mod::test_minimum_possible_node ... ok
[INFO] [stdout] test recursion::validate_bst::test_validate_bst_mod::test_validate_possible_bst ... ok
[INFO] [stdout] test recursion::validate_bst::test_validate_bst_mod::test_single_node ... ok
[INFO] [stdout] test recursion::validate_bst::test_validate_bst_mod::test_valid_bst ... ok
[INFO] [stdout] test recursion::reverse_linked_list::test_reverse_list_cont::test_reverse_list ... ok
[INFO] [stdout] test recursion::search_2d_matrix::test_search_matrix_mod::test_search_empty_matrix ... ok
[INFO] [stdout] test recursion::search_bst::test_search_bst_cont::test_search_bst ... ok
[INFO] [stdout] test recursion::swap_node_pairs::test_swap_pairs_cont::test_function_can_make_linked_list ... ok
[INFO] [stdout] test recursion::skyline_problem::test_skyline_mod::test_skyline ... FAILED
[INFO] [stdout] test recursion::unique_binary_tree::test_unique_bsts_mod::test_unique_bsts ... ok
[INFO] [stdout] test recursion::sudoku_player::test_sudoku_mod::test_sudoku ... ok
[INFO] [stderr] error: test failed, to rerun pass '-p data_structures --lib'
[INFO] [stdout] test queues_stacks::open_the_lock::test_open_lock::test_the_open_lock ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- recursion::skyline_problem::test_skyline_mod::test_skyline stdout ----
[INFO] [stdout] the buildings [
[INFO] [stdout]     [
[INFO] [stdout]         1,
[INFO] [stdout]         1,
[INFO] [stdout]     ],
[INFO] [stdout]     [
[INFO] [stdout]         1,
[INFO] [stdout]         2,
[INFO] [stdout]     ],
[INFO] [stdout]     [
[INFO] [stdout]         1,
[INFO] [stdout]         3,
[INFO] [stdout]     ],
[INFO] [stdout]     [
[INFO] [stdout]         2,
[INFO] [stdout]         0,
[INFO] [stdout]     ],
[INFO] [stdout] ]
[INFO] [stdout] thread 'recursion::skyline_problem::test_skyline_mod::test_skyline' panicked at 'assertion failed: `(left == right)`
[INFO] [stdout]   left: `3`,
[INFO] [stdout]  right: `4`', data_structures/src/recursion/skyline_problem.rs:141:10
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x555b164864a0 - std::backtrace_rs::backtrace::libunwind::trace::h34055254b57d8e79
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x555b164864a0 - std::backtrace_rs::backtrace::trace_unsynchronized::h8f1e3fbd9afff6ec
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x555b164864a0 - std::sys_common::backtrace::_print_fmt::h3a99a796b770c360
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x555b164864a0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h32d1f94a80615d18
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x555b164a950c - core::fmt::write::h306731c068f7162c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/fmt/mod.rs:1110:17
[INFO] [stdout]    5:     0x555b164833c5 - std::io::Write::write_fmt::h87f19b0a2cd190bc
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/io/mod.rs:1588:15
[INFO] [stdout]    6:     0x555b1648860b - std::sys_common::backtrace::_print::h5abaa2601a852287
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x555b1648860b - std::sys_common::backtrace::print::h8d81445442bb638f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x555b1648860b - std::panicking::default_hook::{{closure}}::hcfe804496a9fa747
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x555b1648811c - std::panicking::default_hook::hbea8e3ccf2ba8901
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x555b16488cd4 - std::panicking::rust_panic_with_hook::h7ee9e1a2d0f8975a
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x555b164887b7 - std::panicking::begin_panic_handler::{{closure}}::h8ab3b4491718b2c7
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x555b1648699c - std::sys_common::backtrace::__rust_end_short_backtrace::hd489062ffa586a9f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x555b16488719 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x555b16364751 - core::panicking::panic_fmt::hca6330e3e14086b4
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x555b164a75b8 - core::panicking::assert_failed_inner::h33b45280069a80ed
[INFO] [stdout]   16:     0x555b163cfc8a - core::panicking::assert_failed::h7fa2609eadd1623a
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/panicking.rs:117:5
[INFO] [stdout]   17:     0x555b163fc7f2 - data_structures::recursion::skyline_problem::test_skyline_mod::test_skyline::h1671752b5b86db3d
[INFO] [stdout]                                at /opt/rustwide/workdir/data_structures/src/recursion/skyline_problem.rs:141:10
[INFO] [stdout]   18:     0x555b163fc4ca - data_structures::recursion::skyline_problem::test_skyline_mod::test_skyline::{{closure}}::h1f8ff6ddf59ee6fa
[INFO] [stdout]                                at /opt/rustwide/workdir/data_structures/src/recursion/skyline_problem.rs:99:5
[INFO] [stdout]   19:     0x555b1639d90e - core::ops::function::FnOnce::call_once::h5f3b2c8a362a1c85
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x555b1645d9a3 - core::ops::function::FnOnce::call_once::h152e7e439ff59e19
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x555b1645d9a3 - test::__rust_begin_short_backtrace::h0908f3b1fdbb72ab
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:577:5
[INFO] [stdout]   22:     0x555b1645c460 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf6d2a51e5587546c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   23:     0x555b1645c460 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8af660f3a89ef593
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x555b1645c460 - std::panicking::try::do_call::hd36aef60f84b6d36
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x555b1645c460 - std::panicking::try::h9932b4480e69817c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x555b1645c460 - std::panic::catch_unwind::h6aa177099cfff5f8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x555b1645c460 - test::run_test_in_process::h5884d6f2d99e20c3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:600:18
[INFO] [stdout]   28:     0x555b1645c460 - test::run_test::run_test_inner::{{closure}}::h6fdc58c6d5f5b6e3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:492:39
[INFO] [stdout]   29:     0x555b16435b12 - test::run_test::run_test_inner::{{closure}}::h408365d67a78ade8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:519:37
[INFO] [stdout]   30:     0x555b16435b12 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb560b77c4f701523
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x555b164396c8 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hf2e7831dad93c597
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:481:17
[INFO] [stdout]   32:     0x555b164396c8 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd2e08783d8be4d02
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x555b164396c8 - std::panicking::try::do_call::h062597b7acfd6b82
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x555b164396c8 - std::panicking::try::h0d7b79db04c14552
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x555b164396c8 - std::panic::catch_unwind::hb01a0b5e7c8cd43b
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x555b164396c8 - std::thread::Builder::spawn_unchecked::{{closure}}::h5bde48cc887e0d1e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:480:30
[INFO] [stdout]   37:     0x555b164396c8 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h745ea30807a29e55
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x555b1648d797 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ece6cfefaff1005
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   39:     0x555b1648d797 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb8b48e55c21f193e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   40:     0x555b1648d797 - std::sys::unix::thread::Thread::new::thread_start::h8c7c4450dba62914
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys/unix/thread.rs:71:17
[INFO] [stdout]   41:     0x7fb492de5609 - start_thread
[INFO] [stdout]   42:     0x7fb492bb7293 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     recursion::skyline_problem::test_skyline_mod::test_skyline
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 108 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.64s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a7acdc4ee163baf24af62720be23e35e96665ccb41c77af9bbc1d62fa4507db6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7acdc4ee163baf24af62720be23e35e96665ccb41c77af9bbc1d62fa4507db6", kill_on_drop: false }`
[INFO] [stdout] a7acdc4ee163baf24af62720be23e35e96665ccb41c77af9bbc1d62fa4507db6
