[INFO] cloning repository https://github.com/sjinno/leet-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjinno/leet-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjinno%2Fleet-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjinno%2Fleet-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3af3adb55b2b75008e9f8022f16e58bd3275aa47
[INFO] checking sjinno/leet-code against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjinno%2Fleet-code" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sjinno/leet-code on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sjinno/leet-code
[INFO] finished tweaking git repo https://github.com/sjinno/leet-code
[INFO] tweaked toml for git repo https://github.com/sjinno/leet-code written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate git repo https://github.com/sjinno/leet-code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 651ff422da641cad16db5ccafa21b9f46aea8f2f87e6a815ed3d20361858d22e
[INFO] running `Command { std: "docker" "start" "-a" "651ff422da641cad16db5ccafa21b9f46aea8f2f87e6a815ed3d20361858d22e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "651ff422da641cad16db5ccafa21b9f46aea8f2f87e6a815ed3d20361858d22e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "651ff422da641cad16db5ccafa21b9f46aea8f2f87e6a815ed3d20361858d22e", kill_on_drop: false }`
[INFO] [stdout] 651ff422da641cad16db5ccafa21b9f46aea8f2f87e6a815ed3d20361858d22e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc3b4cea2cfe1f92cc4f09378e7ac57e1714b04adbbba0b07fb85ddac78f1f6e
[INFO] running `Command { std: "docker" "start" "-a" "fc3b4cea2cfe1f92cc4f09378e7ac57e1714b04adbbba0b07fb85ddac78f1f6e", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking leet-code v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/bin/q-104.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-100.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-088.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-021.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-014.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-009.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-026.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-007.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-001.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-020.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-003.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-035.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-055.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/q-017.rs from 2018 edition to 2021
[INFO] [stdout] error[E0412]: cannot find type `Solution` in this scope
[INFO] [stdout]   --> src/bin/q-104.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Solution {
[INFO] [stdout]    |      ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `TreeNode` in this scope
[INFO] [stdout]   --> src/bin/q-104.rs:23:46
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Solution {
[INFO] [stdout]    |     - help: you might be missing a type parameter: `<TreeNode>`
[INFO] [stdout] 23 |     pub fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |                                              ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `leet-code` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: function is never used: `merge`
[INFO] [stdout]  --> src/bin/q-088.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed src/bin/q-021.rs (4 fixes)
[INFO] [stdout] warning: function is never used: `longest_common_prefix`
[INFO] [stdout]  --> src/bin/q-014.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/bin/q-021.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `merge_two_lists`
[INFO] [stdout]   --> src/bin/q-021.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn merge_two_lists(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_palindrome`
[INFO] [stdout]  --> src/bin/q-009.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/bin/q-021.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `merge_two_lists`
[INFO] [stdout]   --> src/bin/q-021.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn merge_two_lists(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `two_sum`
[INFO] [stdout]  --> src/bin/q-001.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse`
[INFO] [stdout]  --> src/bin/q-007.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn reverse(x: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse`
[INFO] [stdout]  --> src/bin/q-007.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn reverse(x: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `remove_duplicates`
[INFO] [stdout]  --> src/bin/q-026.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_valid`
[INFO] [stdout]  --> src/bin/q-020.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn is_valid(s: String) -> bool {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `merge`
[INFO] [stdout]  --> src/bin/q-088.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!` or `[`, found `3.`
[INFO] [stdout]  --> src/bin/q-003.rs:1:3
[INFO] [stdout]   |
[INFO] [stdout] 1 | # 3. Longest Substring Without Repeating Characters
[INFO] [stdout]   |   ^^ expected one of `!` or `[`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `remove_duplicates`
[INFO] [stdout]  --> src/bin/q-026.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[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
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `two_sum`
[INFO] [stdout]  --> src/bin/q-001.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Solution` in this scope
[INFO] [stdout]   --> src/bin/q-104.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Solution {
[INFO] [stdout]    |      ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `TreeNode` in this scope
[INFO] [stdout]   --> src/bin/q-104.rs:23:46
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Solution {
[INFO] [stdout]    |     - help: you might be missing a type parameter: `<TreeNode>`
[INFO] [stdout] 23 |     pub fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |                                              ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `search_insert`
[INFO] [stdout]  --> src/bin/q-035.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn search_insert(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max_sub_array`
[INFO] [stdout]   --> src/bin/q-055.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `search_insert`
[INFO] [stdout]  --> src/bin/q-035.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn search_insert(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max_sub_array`
[INFO] [stdout]   --> src/bin/q-055.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_palindrome`
[INFO] [stdout]  --> src/bin/q-009.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_common_prefix`
[INFO] [stdout]  --> src/bin/q-014.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!` or `[`, found `3.`
[INFO] [stdout]  --> src/bin/q-003.rs:1:3
[INFO] [stdout]   |
[INFO] [stdout] 1 | # 3. Longest Substring Without Repeating Characters
[INFO] [stdout]   |   ^^ expected one of `!` or `[`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `letter_combinations`
[INFO] [stdout]   --> src/bin/q-017.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn letter_combinations(digits: String) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_valid`
[INFO] [stdout]  --> src/bin/q-020.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn is_valid(s: String) -> bool {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `letter_combinations`
[INFO] [stdout]   --> src/bin/q-017.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn letter_combinations(digits: String) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "fc3b4cea2cfe1f92cc4f09378e7ac57e1714b04adbbba0b07fb85ddac78f1f6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc3b4cea2cfe1f92cc4f09378e7ac57e1714b04adbbba0b07fb85ddac78f1f6e", kill_on_drop: false }`
[INFO] [stdout] fc3b4cea2cfe1f92cc4f09378e7ac57e1714b04adbbba0b07fb85ddac78f1f6e