[INFO] fetching crate diffmatchpatch 0.0.4...
[INFO] testing diffmatchpatch-0.0.4 against 1.90.0 for beta-1.91-3
[INFO] extracting crate diffmatchpatch 0.0.4 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate diffmatchpatch 0.0.4
[INFO] finished tweaking crates.io crate diffmatchpatch 0.0.4
[INFO] tweaked toml for crates.io crate diffmatchpatch 0.0.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate diffmatchpatch 0.0.4 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate diffmatchpatch 0.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded plotters-svg v0.3.3
[INFO] [stderr]   Downloaded ciborium-io v0.2.0
[INFO] [stderr]   Downloaded plotters-backend v0.3.4
[INFO] [stderr]   Downloaded ciborium-ll v0.2.0
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[INFO] [stderr]   Downloaded ciborium v0.2.0
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[INFO] [stderr]   Downloaded textwrap v0.16.0
[INFO] [stderr]   Downloaded rayon-core v1.10.2
[INFO] [stderr]   Downloaded plotters v0.3.4
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.6
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.13
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[INFO] [stderr]   Downloaded rayon v1.6.1
[INFO] [stderr]   Downloaded clap v3.2.23
[INFO] [stderr]   Downloaded regex v1.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8a2108fafaaf14e77402aca9a7a3c9d76e2eb0e00c2ce72a69cf316078bad5b
[INFO] running `Command { std: "docker" "start" "-a" "b8a2108fafaaf14e77402aca9a7a3c9d76e2eb0e00c2ce72a69cf316078bad5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8a2108fafaaf14e77402aca9a7a3c9d76e2eb0e00c2ce72a69cf316078bad5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8a2108fafaaf14e77402aca9a7a3c9d76e2eb0e00c2ce72a69cf316078bad5b", kill_on_drop: false }`
[INFO] [stdout] b8a2108fafaaf14e77402aca9a7a3c9d76e2eb0e00c2ce72a69cf316078bad5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d477a1d091bf14641562ed03245a22cc93e5b0b1f6771224c59f7b52d7fe4f05
[INFO] running `Command { std: "docker" "start" "-a" "d477a1d091bf14641562ed03245a22cc93e5b0b1f6771224c59f7b52d7fe4f05", kill_on_drop: false }`
[INFO] [stderr]    Compiling diffmatchpatch v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `diffs`
[INFO] [stdout]     --> src/lib.rs:1962:35
[INFO] [stdout]      |
[INFO] [stdout] 1962 |     pub fn patch_make2(&mut self, diffs: &mut Vec<Diff>) -> Vec<Patch> {
[INFO] [stdout]      |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_diffs`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `Command { std: "docker" "inspect" "d477a1d091bf14641562ed03245a22cc93e5b0b1f6771224c59f7b52d7fe4f05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d477a1d091bf14641562ed03245a22cc93e5b0b1f6771224c59f7b52d7fe4f05", kill_on_drop: false }`
[INFO] [stdout] d477a1d091bf14641562ed03245a22cc93e5b0b1f6771224c59f7b52d7fe4f05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd611785e2db7c5dee692b747022b4c19a4a26de537ac29921423687e69dfc5a
[INFO] running `Command { std: "docker" "start" "-a" "bd611785e2db7c5dee692b747022b4c19a4a26de537ac29921423687e69dfc5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling rayon-core v1.10.2
[INFO] [stderr]    Compiling serde_json v1.0.93
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.6
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling ciborium-io v0.2.0
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling plotters-backend v0.3.4
[INFO] [stderr]    Compiling crossbeam-deque v0.8.2
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling plotters-svg v0.3.3
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling ciborium-ll v0.2.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling rayon v1.6.1
[INFO] [stderr]    Compiling clap v3.2.23
[INFO] [stderr]    Compiling plotters v0.3.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stdout] warning: unused variable: `diffs`
[INFO] [stdout]     --> src/lib.rs:1962:35
[INFO] [stdout]      |
[INFO] [stdout] 1962 |     pub fn patch_make2(&mut self, diffs: &mut Vec<Diff>) -> Vec<Patch> {
[INFO] [stdout]      |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_diffs`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling criterion-plot v0.5.0
[INFO] [stderr]    Compiling regex v1.7.1
[INFO] [stderr]    Compiling ciborium v0.2.0
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.4.0
[INFO] [stderr]    Compiling diffmatchpatch v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> examples/block_diff.rs:169:5
[INFO] [stdout]     |
[INFO] [stdout] 166 |     todo!();
[INFO] [stdout]     |     ------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 169 |     let mut diffs = dmp.diff_main(&ac, &bc, false);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/block_diff.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let mut diffs = dmp.diff_main(&ac, &bc, false);
[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: unused variable: `i`
[INFO] [stdout]    --> examples/block_diff.rs:122:10
[INFO] [stdout]     |
[INFO] [stdout] 122 |     for (i, diff) in diff_blocks(base_blocks, branch_a).into_iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `diff`
[INFO] [stdout]    --> examples/block_diff.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |     for (i, diff) in diff_blocks(base_blocks, branch_a).into_iter().enumerate() {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_diff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `branch_b`
[INFO] [stdout]    --> examples/block_diff.rs:119:74
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn merge_blocks<'a>(base_blocks: &'a [&'a str], branch_a: &'a [&'a str], branch_b: &'a [&'a str]) {
[INFO] [stdout]     |                                                                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_branch_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> examples/block_diff.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let a = r"- Block 1
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> examples/block_diff.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |     let b = r"- Block 1
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> examples/block_diff.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let b = include_str!("b.md");
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diff_blocks` is never used
[INFO] [stdout]    --> examples/block_diff.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn diff_blocks<'a>(
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_blocks` is never used
[INFO] [stdout]    --> examples/block_diff.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn merge_blocks<'a>(base_blocks: &'a [&'a str], branch_a: &'a [&'a str], branch_b: &'a [&'a str]) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `diffs`
[INFO] [stdout]     --> src/lib.rs:1962:35
[INFO] [stdout]      |
[INFO] [stdout] 1962 |     pub fn patch_make2(&mut self, diffs: &mut Vec<Diff>) -> Vec<Patch> {
[INFO] [stdout]      |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_diffs`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 48.68s
[INFO] running `Command { std: "docker" "inspect" "bd611785e2db7c5dee692b747022b4c19a4a26de537ac29921423687e69dfc5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd611785e2db7c5dee692b747022b4c19a4a26de537ac29921423687e69dfc5a", kill_on_drop: false }`
[INFO] [stdout] bd611785e2db7c5dee692b747022b4c19a4a26de537ac29921423687e69dfc5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fd1e299da37465f1720dbe7b8193d76a42b7be8224cf9c8e8ecccd0d8065201f
[INFO] running `Command { std: "docker" "start" "-a" "fd1e299da37465f1720dbe7b8193d76a42b7be8224cf9c8e8ecccd0d8065201f", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `diffs`
[INFO] [stderr]     --> src/lib.rs:1962:35
[INFO] [stderr]      |
[INFO] [stderr] 1962 |     pub fn patch_make2(&mut self, diffs: &mut Vec<Diff>) -> Vec<Patch> {
[INFO] [stderr]      |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_diffs`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `diffmatchpatch` (lib) generated 1 warning
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> examples/block_diff.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 166 |     todo!();
[INFO] [stderr]     |     ------- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 169 |     let mut diffs = dmp.diff_main(&ac, &bc, false);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> examples/block_diff.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |     let mut diffs = dmp.diff_main(&ac, &bc, false);
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> examples/block_diff.rs:122:10
[INFO] [stderr]     |
[INFO] [stderr] 122 |     for (i, diff) in diff_blocks(base_blocks, branch_a).into_iter().enumerate() {
[INFO] [stderr]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `diff`
[INFO] [stderr]    --> examples/block_diff.rs:122:13
[INFO] [stderr]     |
[INFO] [stderr] 122 |     for (i, diff) in diff_blocks(base_blocks, branch_a).into_iter().enumerate() {
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_diff`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `branch_b`
[INFO] [stderr]    --> examples/block_diff.rs:119:74
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn merge_blocks<'a>(base_blocks: &'a [&'a str], branch_a: &'a [&'a str], branch_b: &'a [&'a str]) {
[INFO] [stderr]     |                                                                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_branch_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> examples/block_diff.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |     let a = r"- Block 1
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> examples/block_diff.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |     let b = r"- Block 1
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> examples/block_diff.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |     let b = include_str!("b.md");
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: function `diff_blocks` is never used
[INFO] [stderr]    --> examples/block_diff.rs:104:4
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn diff_blocks<'a>(
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `merge_blocks` is never used
[INFO] [stderr]    --> examples/block_diff.rs:119:4
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn merge_blocks<'a>(base_blocks: &'a [&'a str], branch_a: &'a [&'a str], branch_b: &'a [&'a str]) {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `diffmatchpatch` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: `diffmatchpatch` (example "block_diff") generated 10 warnings (run `cargo fix --example "block_diff"` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/diffmatchpatch-ee9eb8a5f0339453)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/diff.rs (/opt/rustwide/target/debug/deps/diff-efcd7d8290e93028)
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test diff_cleanup_merge ... ok
[INFO] [stdout] test diff_cleanup_semantic_lossless ... ok
[INFO] [stdout] test diff_cleanup_semantic ... ok
[INFO] [stdout] test diff_chars_to_lines ... ok
[INFO] [stdout] test diff_cleanup_efficiency ... ok
[INFO] [stdout] test diff_from_delta_special_characters ... ok
[INFO] [stdout] test diff_common_overlap ... ok
[INFO] [stdout] test diff_levenshtein ... ok
[INFO] [stdout] test diff_common_prefix ... ok
[INFO] [stdout] test diff_half_match ... ok
[INFO] [stdout] test diff_common_suffix ... ok
[INFO] [stdout] test diff_from_delta ... ok
[INFO] [stdout] test diff_to_delta ... ok
[INFO] [stdout] test diff_lines_to_chars ... ok
[INFO] [stdout] test diff_text ... ok
[INFO] [stdout] test diff_xindex ... ok
[INFO] [stdout] test diff_bisect ... ok
[INFO] [stdout] test diff_main ... ok
[INFO] [stderr]      Running tests/match.rs (/opt/rustwide/target/debug/deps/match-437923433c5c5356)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test match_alphabet ... ok
[INFO] [stdout] test match_main ... ok
[INFO] [stdout] test match_bitap ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/patch.rs (/opt/rustwide/target/debug/deps/patch-c74d8e5e1c71c619)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test patch_obj ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests diffmatchpatch
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fd1e299da37465f1720dbe7b8193d76a42b7be8224cf9c8e8ecccd0d8065201f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd1e299da37465f1720dbe7b8193d76a42b7be8224cf9c8e8ecccd0d8065201f", kill_on_drop: false }`
[INFO] [stdout] fd1e299da37465f1720dbe7b8193d76a42b7be8224cf9c8e8ecccd0d8065201f
