[INFO] cloning repository https://github.com/rust-notes-and-demos/algo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-notes-and-demos/algo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-notes-and-demos%2Falgo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-notes-and-demos%2Falgo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ae5c4608db26bf7a32be96947d77f02b03c7a18
[INFO] testing rust-notes-and-demos/algo against master#552a959051cebf8f88a8f558399baf733bec9ce0 for pr-136932
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-notes-and-demos%2Falgo" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-notes-and-demos/algo on toolchain 552a959051cebf8f88a8f558399baf733bec9ce0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rust-notes-and-demos/algo
[INFO] finished tweaking git repo https://github.com/rust-notes-and-demos/algo
[INFO] tweaked toml for git repo https://github.com/rust-notes-and-demos/algo written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-notes-and-demos/algo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2bd37181ee1f18a604f1ef9d0d3af2537bb64d2df74ffa7b23cec8514b239c08
[INFO] running `Command { std: "docker" "start" "-a" "2bd37181ee1f18a604f1ef9d0d3af2537bb64d2df74ffa7b23cec8514b239c08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2bd37181ee1f18a604f1ef9d0d3af2537bb64d2df74ffa7b23cec8514b239c08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bd37181ee1f18a604f1ef9d0d3af2537bb64d2df74ffa7b23cec8514b239c08", kill_on_drop: false }`
[INFO] [stdout] 2bd37181ee1f18a604f1ef9d0d3af2537bb64d2df74ffa7b23cec8514b239c08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c8093224e25a1f821da9e7c75e736af84f87cc99fef8388a1db6de3aad1dafc
[INFO] running `Command { std: "docker" "start" "-a" "0c8093224e25a1f821da9e7c75e736af84f87cc99fef8388a1db6de3aad1dafc", kill_on_drop: false }`
[INFO] [stderr]    Compiling algo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:47
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                   ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:42
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:40
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |         for (j, num2) in input_array[i+1..].iter().enumerate() {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn two_sum_best(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[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: function `two_sum_brute_force` is never used
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_better` is never used
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_best` is never used
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_brute_force` is never used
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_better` is never used
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn two_sum_better(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_best` is never used
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn two_sum_best(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "0c8093224e25a1f821da9e7c75e736af84f87cc99fef8388a1db6de3aad1dafc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c8093224e25a1f821da9e7c75e736af84f87cc99fef8388a1db6de3aad1dafc", kill_on_drop: false }`
[INFO] [stdout] 0c8093224e25a1f821da9e7c75e736af84f87cc99fef8388a1db6de3aad1dafc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd70a18673e5d48ee37095203661c689031ca6f191ffd9461677b9a7c4779492
[INFO] running `Command { std: "docker" "start" "-a" "fd70a18673e5d48ee37095203661c689031ca6f191ffd9461677b9a7c4779492", kill_on_drop: false }`
[INFO] [stderr]    Compiling algo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:47
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                   ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:42
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:40
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |         for (j, num2) in input_array[i+1..].iter().enumerate() {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn two_sum_best(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[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: function `two_sum_brute_force` is never used
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_better` is never used
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_best` is never used
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_brute_force` is never used
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_better` is never used
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn two_sum_better(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum_best` is never used
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn two_sum_best(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:10:47
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum_brute_force(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                   ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:16:42
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn two_sum_better(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_array`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_sum`
[INFO] [stdout]   --> src/questions/two_num_sum.rs:22:40
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn two_sum_best(input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[INFO] [stdout]    |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |         for (j, num2) in input_array[i+1..].iter().enumerate() {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solutions/two_num_sum.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn two_sum_best(mut input_array: Vec<i32>, target_sum: i32) -> Vec<i32> {
[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] [stderr] rustc-LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stderr] error: could not compile `algo` (lib test); 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/552a959051cebf8f88a8f558399baf733bec9ce0/bin/rustc --crate-name algo --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=5e5a742db5ac174b -C extra-filename=-6fdfdd3fe3ab0c4d --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "fd70a18673e5d48ee37095203661c689031ca6f191ffd9461677b9a7c4779492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd70a18673e5d48ee37095203661c689031ca6f191ffd9461677b9a7c4779492", kill_on_drop: false }`
[INFO] [stdout] fd70a18673e5d48ee37095203661c689031ca6f191ffd9461677b9a7c4779492