[INFO] cloning repository https://github.com/satanson/rust_etudes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/satanson/rust_etudes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsatanson%2Frust_etudes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsatanson%2Frust_etudes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0501fe82134be8ab3428a96b7818367e4bb95d77
[INFO] checking satanson/rust_etudes against try#b0d0ea232bdae12fa8da8491a91ae1db029990ef for pr-84037
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsatanson%2Frust_etudes" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/satanson/rust_etudes on toolchain b0d0ea232bdae12fa8da8491a91ae1db029990ef
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/satanson/rust_etudes
[INFO] finished tweaking git repo https://github.com/satanson/rust_etudes
[INFO] tweaked toml for git repo https://github.com/satanson/rust_etudes written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/satanson/rust_etudes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42578c3d67cbc9c604a30d0da04f394ad90eee31c2b1feea26819ed9f4b7fabc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "42578c3d67cbc9c604a30d0da04f394ad90eee31c2b1feea26819ed9f4b7fabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42578c3d67cbc9c604a30d0da04f394ad90eee31c2b1feea26819ed9f4b7fabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42578c3d67cbc9c604a30d0da04f394ad90eee31c2b1feea26819ed9f4b7fabc", kill_on_drop: false }`
[INFO] [stdout] 42578c3d67cbc9c604a30d0da04f394ad90eee31c2b1feea26819ed9f4b7fabc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 758f68c4af751e3a1ffa10ce40198b07a69f056be8c484538788f8c2240d45ce
[INFO] running `Command { std: "docker" "start" "-a" "758f68c4af751e3a1ffa10ce40198b07a69f056be8c484538788f8c2240d45ce", kill_on_drop: false }`
[INFO] [stderr]     Checking common v0.1.0 (/opt/rustwide/workdir/common)
[INFO] [stderr]    Compiling my_proc_macro v1.0.0 (/opt/rustwide/workdir/my_proc_macro)
[INFO] [stderr]     Checking etudes v0.1.0 (/opt/rustwide/workdir/etudes)
[INFO] [stderr]     Checking n013_Roman_to_Integer v0.1.0 (/opt/rustwide/workdir/n013_Roman_to_Integer)
[INFO] [stderr]     Checking n049_Group_Anagrams v0.1.0 (/opt/rustwide/workdir/n049_Group_Anagrams)
[INFO] [stderr]     Checking n051_N_Queens v0.1.0 (/opt/rustwide/workdir/n051_N_Queens)
[INFO] [stderr]     Checking n031_Next_Permutation v0.1.0 (/opt/rustwide/workdir/n031_Next_Permutation)
[INFO] [stderr]     Checking conditional_compiling v0.1.0 (/opt/rustwide/workdir/conditional_compiling)
[INFO] [stderr]     Checking n040_Combination_Sum_II v0.1.0 (/opt/rustwide/workdir/n040_Combination_Sum_II)
[INFO] [stderr]     Checking n035_Search_Insert_Position v0.1.0 (/opt/rustwide/workdir/n035_Search_Insert_Position)
[INFO] [stderr]     Checking Longest_Palindromic_Substring v0.1.0 (/opt/rustwide/workdir/Longest_Palindromic_Substring)
[INFO] [stderr]     Checking n029_Divide_Two_Integers v0.1.0 (/opt/rustwide/workdir/n029_Divide_Two_Integers)
[INFO] [stderr]     Checking n048_Rotate_Image v0.1.0 (/opt/rustwide/workdir/n048_Rotate_Image)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> common/src/lib.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |         '1'...'9' => {
[INFO] [stdout]    |            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n035_Search_Insert_Position` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n035_search_insert_position`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Pair` in this scope
[INFO] [stdout]  --> n051_N_Queens/src/main.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct StkElm {
[INFO] [stdout]   |              - help: you might be missing a type parameter: `<Pair>`
[INFO] [stdout] 5 |   pos: Pos,
[INFO] [stdout] 6 |   alternatives: Vec<Pair>
[INFO] [stdout]   |                     ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> n051_N_Queens/src/main.rs:10:45
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Box::new(StkElm{pos:(0,0), alternatives:vec!()})
[INFO] [stdout]    |                                             ^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> etudes/src/util/mod.rs:153:11
[INFO] [stdout]     |
[INFO] [stdout] 153 |   let a: &TraitA = &StructA {};
[INFO] [stdout]     |           ^^^^^^ help: use `dyn`: `dyn TraitA`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> Longest_Palindromic_Substring/src/main.rs:82:7
[INFO] [stdout]    |
[INFO] [stdout] 82 |   let s1 = String::from("eabaf");
[INFO] [stdout]    |       ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n048_Rotate_Image` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n048_rotate_image`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking Reverse_Integer v0.1.0 (/opt/rustwide/workdir/Reverse_Integer)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n040_Combination_Sum_II` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n040_combination_sum_ii`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lcs`
[INFO] [stdout]  --> Longest_Palindromic_Substring/src/main.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |   pub fn lcs(s1: &String, s2: &String) -> (usize, usize) {
[INFO] [stdout]   |          ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]   --> n013_Roman_to_Integer/src/main.rs:98:7
[INFO] [stdout]    |
[INFO] [stdout] 98 |       i += advance;
[INFO] [stdout]    |       ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Longest_Palindromic_Substring` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `longest_palindromic_substring`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n031_Next_Permutation` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n031_next_permutation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Pair` in this scope
[INFO] [stdout]  --> n051_N_Queens/src/main.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct StkElm {
[INFO] [stdout]   |              - help: you might be missing a type parameter: `<Pair>`
[INFO] [stdout] 5 |   pos: Pos,
[INFO] [stdout] 6 |   alternatives: Vec<Pair>
[INFO] [stdout]   |                     ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking n041_First_Missing_Positive v0.1.0 (/opt/rustwide/workdir/n041_First_Missing_Positive)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> n051_N_Queens/src/main.rs:10:45
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Box::new(StkElm{pos:(0,0), alternatives:vec!()})
[INFO] [stdout]    |                                             ^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n013_Roman_to_Integer` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n013_roman_to_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking n033_Search_in_Rotated_Sorted_Array v0.1.0 (/opt/rustwide/workdir/n033_Search_in_Rotated_Sorted_Array)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n049_Group_Anagrams` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n049_group_anagrams`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking n045_Jump_Game_II v0.1.0 (/opt/rustwide/workdir/n045_Jump_Game_II)
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n029_Divide_Two_Integers` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n029_divide_two_integers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking n015_3Sum v0.1.0 (/opt/rustwide/workdir/n015_3Sum)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking Palindrome_Number v0.1.0 (/opt/rustwide/workdir/Palindrome_Number)
[INFO] [stderr]     Checking n028_Implement_strStr v0.1.0 (/opt/rustwide/workdir/n028_Implement_strStr)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> etudes/src/util/mod.rs:153:7
[INFO] [stdout]     |
[INFO] [stdout] 153 |   let a: &TraitA = &StructA {};
[INFO] [stdout]     |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> etudes/src/util/mod.rs:124:7
[INFO] [stdout]     |
[INFO] [stdout] 124 |   let mut a = Wrapper(&s);
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n048_Rotate_Image` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n048_rotate_image`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking n042_Trapping_Rain_Water v0.1.0 (/opt/rustwide/workdir/n042_Trapping_Rain_Water)
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0412.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> common/src/lib.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |         '1'...'9' => {
[INFO] [stdout]    |            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0412.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n045_Jump_Game_II` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n045_jump_game_ii`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `n051_N_Queens`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: constant is never used: `i32_max`
[INFO] [stdout]   --> Reverse_Integer/src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     const i32_max: i32 = std::i32::MAX;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `i32_min`
[INFO] [stdout]   --> Reverse_Integer/src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     const i32_min: i32 = std::i32::MIN;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Reverse_Integer` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `reverse_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `i32_max` should have an upper case name
[INFO] [stdout]  --> Reverse_Integer/src/main.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 |     const i32_max: i32 = std::i32::MAX;
[INFO] [stdout]   |           ^^^^^^^ help: convert the identifier to upper case: `I32_MAX`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `i32_min` should have an upper case name
[INFO] [stdout]   --> Reverse_Integer/src/main.rs:26:11
[INFO] [stdout]    |
[INFO] [stdout] 26 |     const i32_min: i32 = std::i32::MIN;
[INFO] [stdout]    |           ^^^^^^^ help: convert the identifier to upper case: `I32_MIN`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `i32_max` should have an upper case name
[INFO] [stdout]   --> Reverse_Integer/src/main.rs:45:11
[INFO] [stdout]    |
[INFO] [stdout] 45 |     const i32_max: i32 = std::i32::MAX;
[INFO] [stdout]    |           ^^^^^^^ help: convert the identifier to upper case: `I32_MAX`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `i32_min` should have an upper case name
[INFO] [stdout]   --> Reverse_Integer/src/main.rs:46:11
[INFO] [stdout]    |
[INFO] [stdout] 46 |     const i32_min: i32 = std::i32::MIN;
[INFO] [stdout]    |           ^^^^^^^ help: convert the identifier to upper case: `I32_MIN`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n015_3Sum` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n015_3_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Palindrome_Number` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `palindrome_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n028_Implement_strStr` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n028_implement_str_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> etudes/src/util/mod.rs:153:11
[INFO] [stdout]     |
[INFO] [stdout] 153 |   let a: &TraitA = &StructA {};
[INFO] [stdout]     |           ^^^^^^ help: use `dyn`: `dyn TraitA`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n028_Implement_strStr` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n028_implement_str_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `max_i` is assigned to, but never used
[INFO] [stdout]  --> n041_First_Missing_Positive/src/main.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (mut min_i, mut max_i) = (0usize, 0usize);
[INFO] [stdout]   |                         ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_max_i` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_i` is never read
[INFO] [stdout]   --> n041_First_Missing_Positive/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         max_i = i;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n033_Search_in_Rotated_Sorted_Array` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n033_search_in_rotated_sorted_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n041_First_Missing_Positive` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n041_first_missing_positive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `n042_Trapping_Rain_Water` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `n042_trapping_rain_water`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> etudes/src/util/mod.rs:153:7
[INFO] [stdout]     |
[INFO] [stdout] 153 |   let a: &TraitA = &StructA {};
[INFO] [stdout]     |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> etudes/src/util/mod.rs:124:7
[INFO] [stdout]     |
[INFO] [stdout] 124 |   let mut a = Wrapper(&s);
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "758f68c4af751e3a1ffa10ce40198b07a69f056be8c484538788f8c2240d45ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "758f68c4af751e3a1ffa10ce40198b07a69f056be8c484538788f8c2240d45ce", kill_on_drop: false }`
[INFO] [stdout] 758f68c4af751e3a1ffa10ce40198b07a69f056be8c484538788f8c2240d45ce