[INFO] cloning repository https://github.com/arthur-teixeira/huffman-coding [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arthur-teixeira/huffman-coding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farthur-teixeira%2Fhuffman-coding", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farthur-teixeira%2Fhuffman-coding'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 85c8b1e3c575cb553b4802f30c62ae818cd4597a [INFO] checking arthur-teixeira/huffman-coding against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farthur-teixeira%2Fhuffman-coding" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/arthur-teixeira/huffman-coding [INFO] finished tweaking git repo https://github.com/arthur-teixeira/huffman-coding [INFO] tweaked toml for git repo https://github.com/arthur-teixeira/huffman-coding written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/arthur-teixeira/huffman-coding on toolchain a5689b034ad287112f709693384a37f1377eb9cc [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/arthur-teixeira/huffman-coding 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "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-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }` [INFO] [stdout] f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c [INFO] running `Command { std: "docker" "start" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] Checking huffman-encoding v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `output_path` [INFO] [stdout] --> src/main.rs:316:39 [INFO] [stdout] | [INFO] [stdout] 316 | fn do_decompression(input_path: &str, output_path: &str) -> Result<(), Box> { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_output_path` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `at` is never used [INFO] [stdout] --> src/main.rs:196:8 [INFO] [stdout] | [INFO] [stdout] 161 | impl Bitfield { [INFO] [stdout] | ------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 196 | fn at(&self, pos: usize) -> Option { [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `decompress` is never used [INFO] [stdout] --> src/main.rs:253:4 [INFO] [stdout] | [INFO] [stdout] 253 | fn decompress(compressed: &mut Bitfield, tree: &HuffmanTree) -> String { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `decompress_recur` is never used [INFO] [stdout] --> src/main.rs:262:4 [INFO] [stdout] | [INFO] [stdout] 262 | fn decompress_recur( [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `output_path` [INFO] [stdout] --> src/main.rs:316:39 [INFO] [stdout] | [INFO] [stdout] 316 | fn do_decompression(input_path: &str, output_path: &str) -> Result<(), Box> { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_output_path` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: useless conversion to the same type: `BinaryHeap` [INFO] [stdout] --> src/main.rs:295:39 [INFO] [stdout] | [INFO] [stdout] 295 | let tree = construct_huffman_tree(queue.into()); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this method call relies on the `impl Into for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors [INFO] [stdout] = note: `#[deny(self_type_conversion)]` on by default [INFO] [stdout] help: consider removing the conversion call [INFO] [stdout] | [INFO] [stdout] 295 - let tree = construct_huffman_tree(queue.into()); [INFO] [stdout] 295 + let tree = construct_huffman_tree(queue); [INFO] [stdout] | [INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint [INFO] [stdout] | [INFO] [stdout] 295 - let tree = construct_huffman_tree(queue.into()); [INFO] [stdout] 295 + let tree = construct_huffman_tree( as Into<_>>::into(queue)); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_compressed` is never used [INFO] [stdout] --> src/main.rs:363:8 [INFO] [stdout] | [INFO] [stdout] 363 | fn get_compressed(sut: &str) -> crate::Bitfield { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `huffman-encoding` (bin "huffman-encoding") due to 1 previous error; 4 warnings emitted [INFO] [stdout] error: useless conversion to the same type: `BinaryHeap` [INFO] [stdout] --> src/main.rs:295:39 [INFO] [stdout] | [INFO] [stdout] 295 | let tree = construct_huffman_tree(queue.into()); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this method call relies on the `impl Into for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors [INFO] [stdout] = note: `#[deny(self_type_conversion)]` on by default [INFO] [stdout] help: consider removing the conversion call [INFO] [stdout] | [INFO] [stdout] 295 - let tree = construct_huffman_tree(queue.into()); [INFO] [stdout] 295 + let tree = construct_huffman_tree(queue); [INFO] [stdout] | [INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint [INFO] [stdout] | [INFO] [stdout] 295 - let tree = construct_huffman_tree(queue.into()); [INFO] [stdout] 295 + let tree = construct_huffman_tree( as Into<_>>::into(queue)); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `huffman-encoding` (bin "huffman-encoding" test) due to 1 previous error; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c", kill_on_drop: false }` [INFO] [stdout] f97e3ce6bb330d43f75234a4f7dab894d5e367d38978f6dfa07a091933b1a29c