[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 master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsatanson%2Frust_etudes" "/workspace/builds/worker-1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/satanson/rust_etudes on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "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-1/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" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] bd5cf193e83c9e1482234858064713f3443d772a119feb49bbf45baa11fe17ab [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" "bd5cf193e83c9e1482234858064713f3443d772a119feb49bbf45baa11fe17ab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "bd5cf193e83c9e1482234858064713f3443d772a119feb49bbf45baa11fe17ab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bd5cf193e83c9e1482234858064713f3443d772a119feb49bbf45baa11fe17ab", kill_on_drop: false }` [INFO] [stdout] bd5cf193e83c9e1482234858064713f3443d772a119feb49bbf45baa11fe17ab [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 131cc49c7844775246e68b3e61a680d50ef6b5705d0b1c4400b6269a570f7777 [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" "131cc49c7844775246e68b3e61a680d50ef6b5705d0b1c4400b6269a570f7777", 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 two_sum v0.1.0 (/opt/rustwide/workdir/two_sum) [INFO] [stderr] Checking conditional_compiling v0.1.0 (/opt/rustwide/workdir/conditional_compiling) [INFO] [stderr] Checking n041_First_Missing_Positive v0.1.0 (/opt/rustwide/workdir/n041_First_Missing_Positive) [INFO] [stderr] Checking n017_Letter_Combinations_of_a_Phone_Number v0.1.0 (/opt/rustwide/workdir/n017_Letter_Combinations_of_a_Phone_Number) [INFO] [stderr] Checking n013_Roman_to_Integer v0.1.0 (/opt/rustwide/workdir/n013_Roman_to_Integer) [INFO] [stderr] Checking n026_Remove_Duplicates_from_Sorted_Array v0.1.0 (/opt/rustwide/workdir/n026_Remove_Duplicates_from_Sorted_Array) [INFO] [stderr] Checking n047_Permutations_II v0.1.0 (/opt/rustwide/workdir/n047_Permutations_II) [INFO] [stderr] Checking n012_Integer_to_Roman v0.1.0 (/opt/rustwide/workdir/n012_Integer_to_Roman) [INFO] [stderr] Checking n051_N_Queens v0.1.0 (/opt/rustwide/workdir/n051_N_Queens) [INFO] [stderr] Checking n049_Group_Anagrams v0.1.0 (/opt/rustwide/workdir/n049_Group_Anagrams) [INFO] [stderr] Checking n011_Container_With_Most_Water v0.1.0 (/opt/rustwide/workdir/n011_Container_With_Most_Water) [INFO] [stderr] Checking n014_Longest_Common_Prefix v0.1.0 (/opt/rustwide/workdir/n014_Longest_Common_Prefix) [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 `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] [stdout] warning: unreachable statement [INFO] [stdout] --> n026_Remove_Duplicates_from_Sorted_Array/src/main.rs:25:5 [INFO] [stdout] | [INFO] [stdout] 24 | return (i+1) as i32; [INFO] [stdout] | ------------------- any code following this expression is unreachable [INFO] [stdout] 25 | return 0; [INFO] [stdout] | ^^^^^^^^^ unreachable statement [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `n026_Remove_Duplicates_from_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: `n026_remove_duplicates_from_sorted_array` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings 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] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [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] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking Median_of_Two_Sorted_Arrays v0.1.0 (/opt/rustwide/workdir/Median_of_Two_Sorted_Arrays) [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: crate `n012_Integer_to_Roman` 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: `n012_integer_to_roman` [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: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `n011_Container_With_Most_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: `n011_container_with_most_water` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking n046_Permutations v0.1.0 (/opt/rustwide/workdir/n046_Permutations) [INFO] [stderr] Checking n029_Divide_Two_Integers v0.1.0 (/opt/rustwide/workdir/n029_Divide_Two_Integers) [INFO] [stderr] Checking n035_Search_Insert_Position v0.1.0 (/opt/rustwide/workdir/n035_Search_Insert_Position) [INFO] [stderr] Checking n022_Generate_Parentheses v0.1.0 (/opt/rustwide/workdir/n022_Generate_Parentheses) [INFO] [stdout] warning: crate `n014_Longest_Common_Prefix` 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: `n014_longest_common_prefix` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [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] 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: `` [INFO] [stdout] 5 | pos: Pos, [INFO] [stdout] 6 | alternatives: Vec [INFO] [stdout] | ^^^^ not found in this scope [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking n038_Count_and_Say v0.1.0 (/opt/rustwide/workdir/n038_Count_and_Say) [INFO] [stdout] warning: crate `n047_Permutations_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: `n047_permutations_ii` [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] [stderr] Checking n018_4Sum v0.1.0 (/opt/rustwide/workdir/n018_4Sum) [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 `n017_Letter_Combinations_of_a_Phone_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: `n017_letter_combinations_of_a_phone_number` [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: 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] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking Reverse_Integer v0.1.0 (/opt/rustwide/workdir/Reverse_Integer) [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] [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `Median_of_Two_Sorted_Arrays` 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: `median_of_two_sorted_arrays` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: comparison is useless due to type limits [INFO] [stdout] --> Median_of_Two_Sorted_Arrays/src/main.rs:11:16 [INFO] [stdout] | [INFO] [stdout] 11 | assert_eq!(0 <= k && k < a_len + b_len, true); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_comparisons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `n022_Generate_Parentheses` 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: `n022_generate_parentheses` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [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] warning: unnecessary parentheses around assigned value [INFO] [stdout] --> n046_Permutations/src/main.rs:39:18 [INFO] [stdout] | [INFO] [stdout] 39 | xs[i] %= (i+1); [INFO] [stdout] | ^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Iterator` is imported redundantly [INFO] [stdout] --> n038_Count_and_Say/src/main.rs:39:7 [INFO] [stdout] | [INFO] [stdout] 39 | use std::iter::Iterator; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `n046_Permutations` 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: `n046_permutations` [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: variable does not need to be mutable [INFO] [stdout] --> n038_Count_and_Say/src/main.rs:11:10 [INFO] [stdout] | [INFO] [stdout] 11 | let (mut a, mut b) = (&mut s, &mut s2); [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: variable does not need to be mutable [INFO] [stdout] --> n038_Count_and_Say/src/main.rs:11:17 [INFO] [stdout] | [INFO] [stdout] 11 | let (mut a, mut b) = (&mut s, &mut s2); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `n038_Count_and_Say` 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: `n038_count_and_say` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [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] [stdout] warning: crate `n012_Integer_to_Roman` 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: `n012_integer_to_roman` [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] [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] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `thread`, `time` [INFO] [stdout] --> n018_4Sum/src/main.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{thread,time}; [INFO] [stdout] | ^^^^^^ ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `n018_4Sum` 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: `n018_4_sum` [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: unnecessary parentheses around assigned value [INFO] [stdout] --> n046_Permutations/src/main.rs:39:18 [INFO] [stdout] | [INFO] [stdout] 39 | xs[i] %= (i+1); [INFO] [stdout] | ^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [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: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings 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: crate `n046_Permutations` 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: `n046_permutations` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "131cc49c7844775246e68b3e61a680d50ef6b5705d0b1c4400b6269a570f7777", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "131cc49c7844775246e68b3e61a680d50ef6b5705d0b1c4400b6269a570f7777", kill_on_drop: false }` [INFO] [stdout] 131cc49c7844775246e68b3e61a680d50ef6b5705d0b1c4400b6269a570f7777