[INFO] cloning repository https://github.com/Katkevich/rust_diff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Katkevich/rust_diff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKatkevich%2Frust_diff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKatkevich%2Frust_diff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d00bfcb995ab4c9ec5e63b0252c4baa3470d278
[INFO] checking Katkevich/rust_diff against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKatkevich%2Frust_diff" "/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/Katkevich/rust_diff on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Katkevich/rust_diff
[INFO] finished tweaking git repo https://github.com/Katkevich/rust_diff
[INFO] tweaked toml for git repo https://github.com/Katkevich/rust_diff written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Katkevich/rust_diff already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", 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] 81b3df60239d29630d313391e3a203b89e9d9f997d4b6c6eaf6e83297860f069
[INFO] running `Command { std: "docker" "start" "-a" "81b3df60239d29630d313391e3a203b89e9d9f997d4b6c6eaf6e83297860f069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81b3df60239d29630d313391e3a203b89e9d9f997d4b6c6eaf6e83297860f069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81b3df60239d29630d313391e3a203b89e9d9f997d4b6c6eaf6e83297860f069", kill_on_drop: false }`
[INFO] [stdout] 81b3df60239d29630d313391e3a203b89e9d9f997d4b6c6eaf6e83297860f069
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35433d1bf3d95cb6f1b7b16987be0ed9a6704240f141f274b4766994200ff612
[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" "35433d1bf3d95cb6f1b7b16987be0ed9a6704240f141f274b4766994200ff612", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking rust_diff v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Lines`
[INFO] [stdout]  --> src/code_line.rs:1:36
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ BufRead, BufReader, Lines };
[INFO] [stdout]   |                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/code_line.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/code_line.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]  --> src/code_line.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LineDiff`
[INFO] [stdout]  --> src/code_line.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 | use line_diff::{ LineDiff };
[INFO] [stdout]   |                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]  --> src/diff_engine.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::ops::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `BufReader`, `Lines`
[INFO] [stdout]  --> src/lcs.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ BufRead, BufReader, Lines };
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lcs.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{ File };
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/lcs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]  --> src/lcs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LineDiff`
[INFO] [stdout]  --> src/lcs.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 | use line_diff::{ LineDiff };
[INFO] [stdout]   |                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Diff`
[INFO] [stdout]  --> src/lcs.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | use diff_type::{ Diff };
[INFO] [stdout]   |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CodeLine`, `Line`
[INFO] [stdout]  --> src/lcs.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 | use code_line::{ CodeLine, Line };
[INFO] [stdout]   |                  ^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::ops::*;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Changes`, `LCS`
[INFO] [stdout]   --> src/main.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | use lcs::{ LCS, Changes };
[INFO] [stdout]    |            ^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Line`
[INFO] [stdout]   --> src/main.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 | use code_line::{ CodeLine, Line };
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `diff_type::Diff`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use diff_type::Diff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Lines`
[INFO] [stdout]  --> src/code_line.rs:1:36
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ BufRead, BufReader, Lines };
[INFO] [stdout]   |                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/code_line.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/code_line.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]  --> src/code_line.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LineDiff`
[INFO] [stdout]  --> src/code_line.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 | use line_diff::{ LineDiff };
[INFO] [stdout]   |                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]  --> src/diff_engine.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::ops::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `BufReader`, `Lines`
[INFO] [stdout]  --> src/lcs.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ BufRead, BufReader, Lines };
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lcs.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{ File };
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/lcs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]  --> src/lcs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LineDiff`
[INFO] [stdout]  --> src/lcs.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 | use line_diff::{ LineDiff };
[INFO] [stdout]   |                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Diff`
[INFO] [stdout]  --> src/lcs.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | use diff_type::{ Diff };
[INFO] [stdout]   |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CodeLine`, `Line`
[INFO] [stdout]  --> src/lcs.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 | use code_line::{ CodeLine, Line };
[INFO] [stdout]   |                  ^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::*`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::ops::*;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Changes`, `LCS`
[INFO] [stdout]   --> src/main.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | use lcs::{ LCS, Changes };
[INFO] [stdout]    |            ^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Line`
[INFO] [stdout]   --> src/main.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 | use code_line::{ CodeLine, Line };
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `diff_type::Diff`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use diff_type::Diff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter`
[INFO] [stdout]  --> src/lcs.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::iter::*;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `special_symbols_iter`
[INFO] [stdout]   --> src/code_line.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let special_symbols_iter = special_symbol_regex.find_iter(self.code.as_ref());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_special_symbols_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_last_idx`
[INFO] [stdout]   --> src/code_line.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let line_last_idx = self.code.len();
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_last_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lcs_distance`
[INFO] [stdout]   --> src/diff_engine.rs:43:23
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let (lcs_inv, lcs_distance) = LCS::get_lcs_inverted(&self.source_lines, &self.target_lines);
[INFO] [stdout]    |                       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lcs_distance`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source_len`
[INFO] [stdout]    --> src/lcs.rs:104:104
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...size, target_end: usize, source_len: usize, target_len: usize) -> Vec<Changes> {
[INFO] [stdout]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_source_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_len`
[INFO] [stdout]    --> src/lcs.rs:104:123
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...size, source_len: usize, target_len: usize) -> Vec<Changes> {
[INFO] [stdout]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter`
[INFO] [stdout]  --> src/lcs.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::iter::*;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `special_symbols_iter`
[INFO] [stdout]   --> src/code_line.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let special_symbols_iter = special_symbol_regex.find_iter(self.code.as_ref());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_special_symbols_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_last_idx`
[INFO] [stdout]   --> src/code_line.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let line_last_idx = self.code.len();
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_last_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lcs_distance`
[INFO] [stdout]   --> src/diff_engine.rs:43:23
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let (lcs_inv, lcs_distance) = LCS::get_lcs_inverted(&self.source_lines, &self.target_lines);
[INFO] [stdout]    |                       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lcs_distance`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source_len`
[INFO] [stdout]    --> src/lcs.rs:104:104
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...size, target_end: usize, source_len: usize, target_len: usize) -> Vec<Changes> {
[INFO] [stdout]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_source_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target_len`
[INFO] [stdout]    --> src/lcs.rs:104:123
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...size, source_len: usize, target_len: usize) -> Vec<Changes> {
[INFO] [stdout]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `diff`
[INFO] [stdout]   --> src/code_line.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     diff: Diff
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `intervals`
[INFO] [stdout]  --> src/line_diff.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     intervals: Vec<(i32, i32)>
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/line_diff.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn new() -> LineDiff {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Changed`
[INFO] [stdout]  --> src/diff_type.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Changed(LineDiff),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `diff`
[INFO] [stdout]   --> src/code_line.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     diff: Diff
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `intervals`
[INFO] [stdout]  --> src/line_diff.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     intervals: Vec<(i32, i32)>
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/line_diff.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn new() -> LineDiff {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Changed`
[INFO] [stdout]  --> src/diff_type.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Changed(LineDiff),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.22s
[INFO] running `Command { std: "docker" "inspect" "35433d1bf3d95cb6f1b7b16987be0ed9a6704240f141f274b4766994200ff612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35433d1bf3d95cb6f1b7b16987be0ed9a6704240f141f274b4766994200ff612", kill_on_drop: false }`
[INFO] [stdout] 35433d1bf3d95cb6f1b7b16987be0ed9a6704240f141f274b4766994200ff612