[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] documenting satanson/rust_etudes against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsatanson%2Frust_etudes" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/satanson/rust_etudes on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-22/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" "+1.61.0" "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-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8461de301a47dbc8edccd41b1f5cbb74f56dab3a56e2e8fbdbc3ea63683994a
[INFO] running `Command { std: "docker" "start" "-a" "d8461de301a47dbc8edccd41b1f5cbb74f56dab3a56e2e8fbdbc3ea63683994a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8461de301a47dbc8edccd41b1f5cbb74f56dab3a56e2e8fbdbc3ea63683994a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8461de301a47dbc8edccd41b1f5cbb74f56dab3a56e2e8fbdbc3ea63683994a", kill_on_drop: false }`
[INFO] [stdout] d8461de301a47dbc8edccd41b1f5cbb74f56dab3a56e2e8fbdbc3ea63683994a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc51614743754459c83d8fdf6f70721a19d56c2e1a3ac2ff996b3dd723e220ad
[INFO] running `Command { std: "docker" "start" "-a" "dc51614743754459c83d8fdf6f70721a19d56c2e1a3ac2ff996b3dd723e220ad", 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]  Documenting common v0.1.0 (/opt/rustwide/workdir/common)
[INFO] [stderr]  Documenting n028_Implement_strStr v0.1.0 (/opt/rustwide/workdir/n028_Implement_strStr)
[INFO] [stderr]  Documenting Longest_Substring_Without_Repeating_Characters v0.1.0 (/opt/rustwide/workdir/Longest_Substring_Without_Repeating_Characters)
[INFO] [stderr]  Documenting n032_Longest_Valid_Parentheses v0.1.0 (/opt/rustwide/workdir/n032_Longest_Valid_Parentheses)
[INFO] [stderr]  Documenting n047_Permutations_II v0.1.0 (/opt/rustwide/workdir/n047_Permutations_II)
[INFO] [stderr]  Documenting n022_Generate_Parentheses v0.1.0 (/opt/rustwide/workdir/n022_Generate_Parentheses)
[INFO] [stderr]  Documenting n040_Combination_Sum_II v0.1.0 (/opt/rustwide/workdir/n040_Combination_Sum_II)
[INFO] [stderr]  Documenting n045_Jump_Game_II v0.1.0 (/opt/rustwide/workdir/n045_Jump_Game_II)
[INFO] [stderr]  Documenting n043_Multiply_Strings v0.1.0 (/opt/rustwide/workdir/n043_Multiply_Strings)
[INFO] [stderr]  Documenting add_two_numbers v0.1.0 (/opt/rustwide/workdir/add_two_numbers)
[INFO] [stderr]  Documenting Regular_Expression_Matching v0.1.0 (/opt/rustwide/workdir/Regular_Expression_Matching)
[INFO] [stderr]  Documenting n029_Divide_Two_Integers v0.1.0 (/opt/rustwide/workdir/n029_Divide_Two_Integers)
[INFO] [stderr]  Documenting n041_First_Missing_Positive v0.1.0 (/opt/rustwide/workdir/n041_First_Missing_Positive)
[INFO] [stderr]  Documenting n011_Container_With_Most_Water v0.1.0 (/opt/rustwide/workdir/n011_Container_With_Most_Water)
[INFO] [stderr]  Documenting n034_Find_First_and_Last_Position_of_Element_in_Sorted_Array v0.1.0 (/opt/rustwide/workdir/n034_Find_First_and_Last_Position_of_Element_in_Sorted_Array)
[INFO] [stderr]  Documenting Palindrome_Number v0.1.0 (/opt/rustwide/workdir/Palindrome_Number)
[INFO] [stderr]  Documenting n050_Pow_x_n v0.1.0 (/opt/rustwide/workdir/n050_Pow_x_n)
[INFO] [stderr]  Documenting etudes v0.1.0 (/opt/rustwide/workdir/etudes)
[INFO] [stderr]  Documenting n033_Search_in_Rotated_Sorted_Array v0.1.0 (/opt/rustwide/workdir/n033_Search_in_Rotated_Sorted_Array)
[INFO] [stderr]  Documenting n051_N_Queens v0.1.0 (/opt/rustwide/workdir/n051_N_Queens)
[INFO] [stderr]  Documenting n035_Search_Insert_Position v0.1.0 (/opt/rustwide/workdir/n035_Search_Insert_Position)
[INFO] [stderr]  Documenting n027_Remove_Element v0.1.0 (/opt/rustwide/workdir/n027_Remove_Element)
[INFO] [stderr]  Documenting n017_Letter_Combinations_of_a_Phone_Number v0.1.0 (/opt/rustwide/workdir/n017_Letter_Combinations_of_a_Phone_Number)
[INFO] [stderr]  Documenting n013_Roman_to_Integer v0.1.0 (/opt/rustwide/workdir/n013_Roman_to_Integer)
[INFO] [stderr]  Documenting Reverse_Integer v0.1.0 (/opt/rustwide/workdir/Reverse_Integer)
[INFO] [stderr]  Documenting n048_Rotate_Image v0.1.0 (/opt/rustwide/workdir/n048_Rotate_Image)
[INFO] [stderr]  Documenting Median_of_Two_Sorted_Arrays v0.1.0 (/opt/rustwide/workdir/Median_of_Two_Sorted_Arrays)
[INFO] [stderr]  Documenting n014_Longest_Common_Prefix v0.1.0 (/opt/rustwide/workdir/n014_Longest_Common_Prefix)
[INFO] [stderr]  Documenting String_to_Integer v0.1.0 (/opt/rustwide/workdir/String_to_Integer)
[INFO] [stderr]  Documenting n030_Substring_with_Concatenation_of_All_Words v0.1.0 (/opt/rustwide/workdir/n030_Substring_with_Concatenation_of_All_Words)
[INFO] [stderr]  Documenting n015_3Sum v0.1.0 (/opt/rustwide/workdir/n015_3Sum)
[INFO] [stderr]  Documenting n031_Next_Permutation v0.1.0 (/opt/rustwide/workdir/n031_Next_Permutation)
[INFO] [stderr]  Documenting my_proc_macro v1.0.0 (/opt/rustwide/workdir/my_proc_macro)
[INFO] [stderr]  Documenting ZigZag_Conversion v0.1.0 (/opt/rustwide/workdir/ZigZag_Conversion)
[INFO] [stderr]  Documenting two_sum v0.1.0 (/opt/rustwide/workdir/two_sum)
[INFO] [stderr]  Documenting n049_Group_Anagrams v0.1.0 (/opt/rustwide/workdir/n049_Group_Anagrams)
[INFO] [stderr]  Documenting conditional_compiling v0.1.0 (/opt/rustwide/workdir/conditional_compiling)
[INFO] [stderr]  Documenting n046_Permutations v0.1.0 (/opt/rustwide/workdir/n046_Permutations)
[INFO] [stderr]  Documenting n044_Wildcard_Matching v0.1.0 (/opt/rustwide/workdir/n044_Wildcard_Matching)
[INFO] [stderr]  Documenting n012_Integer_to_Roman v0.1.0 (/opt/rustwide/workdir/n012_Integer_to_Roman)
[INFO] [stderr]  Documenting Longest_Palindromic_Substring v0.1.0 (/opt/rustwide/workdir/Longest_Palindromic_Substring)
[INFO] [stderr]  Documenting n039_Combination_Sum v0.1.0 (/opt/rustwide/workdir/n039_Combination_Sum)
[INFO] [stderr]  Documenting n038_Count_and_Say v0.1.0 (/opt/rustwide/workdir/n038_Count_and_Say)
[INFO] [stderr]  Documenting n018_4Sum v0.1.0 (/opt/rustwide/workdir/n018_4Sum)
[INFO] [stderr]  Documenting n020_Valid_Parentheses v0.1.0 (/opt/rustwide/workdir/n020_Valid_Parentheses)
[INFO] [stderr]  Documenting n016_3Sum_Closest v0.1.0 (/opt/rustwide/workdir/n016_3Sum_Closest)
[INFO] [stderr]  Documenting n042_Trapping_Rain_Water v0.1.0 (/opt/rustwide/workdir/n042_Trapping_Rain_Water)
[INFO] [stderr]  Documenting n026_Remove_Duplicates_from_Sorted_Array v0.1.0 (/opt/rustwide/workdir/n026_Remove_Duplicates_from_Sorted_Array)
[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 is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]  Documenting n024_Swap_Nodes_in_Pairs v0.1.0 (/opt/rustwide/workdir/n024_Swap_Nodes_in_Pairs)
[INFO] [stderr]  Documenting n023_Merge_k_Sorted_Lists v0.1.0 (/opt/rustwide/workdir/n023_Merge_k_Sorted_Lists)
[INFO] [stderr]  Documenting n021_Merge_Two_Sorted_Lists v0.1.0 (/opt/rustwide/workdir/n021_Merge_Two_Sorted_Lists)
[INFO] [stderr]  Documenting n019_Remove_Nth_Node_From_End_of_List v0.1.0 (/opt/rustwide/workdir/n019_Remove_Nth_Node_From_End_of_List)
[INFO] [stderr]  Documenting n037_Sudoku_Solver v0.1.0 (/opt/rustwide/workdir/n037_Sudoku_Solver)
[INFO] [stderr]  Documenting n036_Valid_Sudoku v0.1.0 (/opt/rustwide/workdir/n036_Valid_Sudoku)
[INFO] [stderr]  Documenting n025_Reverse_Nodes_in_k_Group v0.1.0 (/opt/rustwide/workdir/n025_Reverse_Nodes_in_k_Group)
[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: `...` 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 is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> n037_Sudoku_Solver/src/main.rs:72:18
[INFO] [stdout]    |
[INFO] [stdout] 72 |               '0'...'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 is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> n036_Valid_Sudoku/src/main.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |         '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 is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `n039_Combination_Sum`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n039_Combination_Sum n039_Combination_Sum/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7c98eb7d202d75ca -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not document `n038_Count_and_Say`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n038_Count_and_Say n038_Count_and_Say/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c49311f3f654d469 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 document `n030_Substring_with_Concatenation_of_All_Words`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n030_Substring_with_Concatenation_of_All_Words n030_Substring_with_Concatenation_of_All_Words/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ce4c7bd10eb27493 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n032_Longest_Valid_Parentheses`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n032_Longest_Valid_Parentheses n032_Longest_Valid_Parentheses/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9edc939ed959ec93 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n051_N_Queens`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n051_N_Queens n051_N_Queens/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bfe27d8adbe5c7af -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] error: could not document `n043_Multiply_Strings`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n043_Multiply_Strings n043_Multiply_Strings/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4ba83cb87d5e458f -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n035_Search_Insert_Position`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n035_Search_Insert_Position n035_Search_Insert_Position/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4ac7c7102b304fb6 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n045_Jump_Game_II`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n045_Jump_Game_II n045_Jump_Game_II/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=42defec8828f860b -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `etudes`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name etudes etudes/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=40814c9aa251411f -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[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]    |                  ^   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 39 -         xs[i] %= (i+1);
[INFO] [stdout] 39 +         xs[i] %= i+1;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `add_two_numbers`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name add_two_numbers add_two_numbers/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=86e8fac7e1d001bd -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `String_to_Integer`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name String_to_Integer String_to_Integer/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c339c74372803b84 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n034_Find_First_and_Last_Position_of_Element_in_Sorted_Array`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n034_Find_First_and_Last_Position_of_Element_in_Sorted_Array n034_Find_First_and_Last_Position_of_Element_in_Sorted_Array/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1e32a84e0d9cd8e0 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n044_Wildcard_Matching`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n044_Wildcard_Matching n044_Wildcard_Matching/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2219625518a19ca0 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `two_sum`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name two_sum two_sum/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6dc6b406ac95e7f9 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n017_Letter_Combinations_of_a_Phone_Number`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n017_Letter_Combinations_of_a_Phone_Number n017_Letter_Combinations_of_a_Phone_Number/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9b80c4dcc93aba97 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n020_Valid_Parentheses`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n020_Valid_Parentheses n020_Valid_Parentheses/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=213228b503e6a05f -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n026_Remove_Duplicates_from_Sorted_Array`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n026_Remove_Duplicates_from_Sorted_Array n026_Remove_Duplicates_from_Sorted_Array/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=47d702c929492926 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n029_Divide_Two_Integers`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n029_Divide_Two_Integers n029_Divide_Two_Integers/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=af4655953b0eab5c -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n012_Integer_to_Roman`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n012_Integer_to_Roman n012_Integer_to_Roman/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=cec72ae629db6842 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n049_Group_Anagrams`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n049_Group_Anagrams n049_Group_Anagrams/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=efa5b39cafb8451f -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `ZigZag_Conversion`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name ZigZag_Conversion ZigZag_Conversion/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a4935c6e495e9fdc -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `common`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name common common/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=41f94c81885de361 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n047_Permutations_II`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n047_Permutations_II n047_Permutations_II/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=eca5b2cf2d7f072d -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n050_Pow_x_n`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n050_Pow_x_n n050_Pow_x_n/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f7cc1875afe054ee -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n022_Generate_Parentheses`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n022_Generate_Parentheses n022_Generate_Parentheses/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2fd9386f7c783489 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n041_First_Missing_Positive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n041_First_Missing_Positive n041_First_Missing_Positive/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=18106020b04133bb -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n025_Reverse_Nodes_in_k_Group`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n025_Reverse_Nodes_in_k_Group n025_Reverse_Nodes_in_k_Group/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2123f85f4d358b53 -L dependency=/opt/rustwide/target/debug/deps --extern common=/opt/rustwide/target/debug/deps/libcommon-41f94c81885de361.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n037_Sudoku_Solver`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n037_Sudoku_Solver n037_Sudoku_Solver/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9dc19b55bdddad12 -L dependency=/opt/rustwide/target/debug/deps --extern common=/opt/rustwide/target/debug/deps/libcommon-41f94c81885de361.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n018_4Sum`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n018_4Sum n018_4Sum/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2018508965a141bc -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `Regular_Expression_Matching`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name Regular_Expression_Matching Regular_Expression_Matching/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=836005a68b0d7ce0 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n036_Valid_Sudoku`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n036_Valid_Sudoku n036_Valid_Sudoku/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4b39c96d998651de -L dependency=/opt/rustwide/target/debug/deps --extern common=/opt/rustwide/target/debug/deps/libcommon-41f94c81885de361.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n031_Next_Permutation`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n031_Next_Permutation n031_Next_Permutation/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2c2b8150b28976d9 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `Longest_Palindromic_Substring`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name Longest_Palindromic_Substring Longest_Palindromic_Substring/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=442b383f2dd5e189 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `Palindrome_Number`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name Palindrome_Number Palindrome_Number/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d3fbbe8de6d17ec5 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n016_3Sum_Closest`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n016_3Sum_Closest n016_3Sum_Closest/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ea8e4577723197cc -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n033_Search_in_Rotated_Sorted_Array`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n033_Search_in_Rotated_Sorted_Array n033_Search_in_Rotated_Sorted_Array/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8da700e8e1992492 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n042_Trapping_Rain_Water`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n042_Trapping_Rain_Water n042_Trapping_Rain_Water/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=29e1754c3b7501ab -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n040_Combination_Sum_II`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n040_Combination_Sum_II n040_Combination_Sum_II/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b31c2ff2f0edf8fd -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n048_Rotate_Image`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n048_Rotate_Image n048_Rotate_Image/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=3d76c4a049551b90 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `n015_3Sum`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name n015_3Sum n015_3Sum/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=11128607c7063104 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `Longest_Substring_Without_Repeating_Characters`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name Longest_Substring_Without_Repeating_Characters Longest_Substring_Without_Repeating_Characters/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=68effc69f55a8288 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `Median_of_Two_Sorted_Arrays`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name Median_of_Two_Sorted_Arrays Median_of_Two_Sorted_Arrays/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=02ba51fb80991ec5 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `my_proc_macro`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type proc-macro --crate-name my_proc_macro my_proc_macro/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=76a8f9f05e496f0d -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro --cap-lints=warn --crate-version 1.0.0` (signal: 9, SIGKILL: kill)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dc51614743754459c83d8fdf6f70721a19d56c2e1a3ac2ff996b3dd723e220ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc51614743754459c83d8fdf6f70721a19d56c2e1a3ac2ff996b3dd723e220ad", kill_on_drop: false }`
[INFO] [stdout] dc51614743754459c83d8fdf6f70721a19d56c2e1a3ac2ff996b3dd723e220ad