[INFO] cloning repository https://github.com/piedshag/huffman [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/piedshag/huffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiedshag%2Fhuffman", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiedshag%2Fhuffman'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 1aed5667a02513ef36f62892967297dc090a6aa7 [INFO] testing piedshag/huffman against beta-2025-09-21 for beta-1.91-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiedshag%2Fhuffman" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/piedshag/huffman [INFO] finished tweaking git repo https://github.com/piedshag/huffman [INFO] tweaked toml for git repo https://github.com/piedshag/huffman written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/piedshag/huffman on toolchain beta-2025-09-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/piedshag/huffman 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 72b4f7cfd6898596964762a919c112d346257de2692e37bf419814a401186588 [INFO] running `Command { std: "docker" "start" "-a" "72b4f7cfd6898596964762a919c112d346257de2692e37bf419814a401186588", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "72b4f7cfd6898596964762a919c112d346257de2692e37bf419814a401186588", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "72b4f7cfd6898596964762a919c112d346257de2692e37bf419814a401186588", kill_on_drop: false }` [INFO] [stdout] 72b4f7cfd6898596964762a919c112d346257de2692e37bf419814a401186588 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 44695f6068b070b42fecc0b0b2e20f7b7cbc3c90092b74bb77022d919445d871 [INFO] running `Command { std: "docker" "start" "-a" "44695f6068b070b42fecc0b0b2e20f7b7cbc3c90092b74bb77022d919445d871", kill_on_drop: false }` [INFO] [stderr] Compiling huffman v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: type alias `NodeRef` is never used [INFO] [stdout] --> src/lib.rs:8:6 [INFO] [stdout] | [INFO] [stdout] 8 | type NodeRef = 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: type alias `HuffmanCodes` is never used [INFO] [stdout] --> src/lib.rs:9:6 [INFO] [stdout] | [INFO] [stdout] 9 | type HuffmanCodes = HashMap; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Node` is never constructed [INFO] [stdout] --> src/lib.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | struct Node { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 31 | impl Node { [INFO] [stdout] | --------- associated function in this implementation [INFO] [stdout] 32 | fn new(weight: i64, symbol: u8) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `HuffmanCode` is never constructed [INFO] [stdout] --> src/lib.rs:43:8 [INFO] [stdout] | [INFO] [stdout] 43 | struct HuffmanCode { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `push`, `bits`, and `clear` are never used [INFO] [stdout] --> src/lib.rs:55:8 [INFO] [stdout] | [INFO] [stdout] 54 | impl HuffmanCode { [INFO] [stdout] | ---------------- methods in this implementation [INFO] [stdout] 55 | fn push(mut self, bit: u8) -> Self { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 61 | fn bits(&self) -> Vec { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 67 | fn clear(&mut self) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generate_huffman` is never used [INFO] [stdout] --> src/lib.rs:73:4 [INFO] [stdout] | [INFO] [stdout] 73 | fn generate_huffman(s: &str) -> HuffmanCodes { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `create_codes` is never used [INFO] [stdout] --> src/lib.rs:111:4 [INFO] [stdout] | [INFO] [stdout] 111 | fn create_codes(code: HuffmanCode, mut root: Node, codes: &mut HuffmanCodes) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `compress` is never used [INFO] [stdout] --> src/lib.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn compress(s: &str, huffman_codes: &HuffmanCodes) -> Vec { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `decompress` is never used [INFO] [stdout] --> src/lib.rs:148:4 [INFO] [stdout] | [INFO] [stdout] 148 | fn decompress(compressed: &[u8], huffman_codes: &HuffmanCodes, output_len: usize) -> Vec { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s [INFO] running `Command { std: "docker" "inspect" "44695f6068b070b42fecc0b0b2e20f7b7cbc3c90092b74bb77022d919445d871", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "44695f6068b070b42fecc0b0b2e20f7b7cbc3c90092b74bb77022d919445d871", kill_on_drop: false }` [INFO] [stdout] 44695f6068b070b42fecc0b0b2e20f7b7cbc3c90092b74bb77022d919445d871 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 81cbe57d4f25ef9e9f96f5a2cb493d356a090123b28dcc8b82482f2a7435698f [INFO] running `Command { std: "docker" "start" "-a" "81cbe57d4f25ef9e9f96f5a2cb493d356a090123b28dcc8b82482f2a7435698f", kill_on_drop: false }` [INFO] [stdout] warning: type alias `NodeRef` is never used [INFO] [stdout] --> src/lib.rs:8:6 [INFO] [stdout] | [INFO] [stdout] 8 | type NodeRef = 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: type alias `HuffmanCodes` is never used [INFO] [stdout] --> src/lib.rs:9:6 [INFO] [stdout] | [INFO] [stdout] 9 | type HuffmanCodes = HashMap; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Node` is never constructed [INFO] [stdout] --> src/lib.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | struct Node { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling huffman v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 31 | impl Node { [INFO] [stdout] | --------- associated function in this implementation [INFO] [stdout] 32 | fn new(weight: i64, symbol: u8) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `HuffmanCode` is never constructed [INFO] [stdout] --> src/lib.rs:43:8 [INFO] [stdout] | [INFO] [stdout] 43 | struct HuffmanCode { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `push`, `bits`, and `clear` are never used [INFO] [stdout] --> src/lib.rs:55:8 [INFO] [stdout] | [INFO] [stdout] 54 | impl HuffmanCode { [INFO] [stdout] | ---------------- methods in this implementation [INFO] [stdout] 55 | fn push(mut self, bit: u8) -> Self { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 61 | fn bits(&self) -> Vec { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 67 | fn clear(&mut self) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generate_huffman` is never used [INFO] [stdout] --> src/lib.rs:73:4 [INFO] [stdout] | [INFO] [stdout] 73 | fn generate_huffman(s: &str) -> HuffmanCodes { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `create_codes` is never used [INFO] [stdout] --> src/lib.rs:111:4 [INFO] [stdout] | [INFO] [stdout] 111 | fn create_codes(code: HuffmanCode, mut root: Node, codes: &mut HuffmanCodes) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `compress` is never used [INFO] [stdout] --> src/lib.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn compress(s: &str, huffman_codes: &HuffmanCodes) -> Vec { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `decompress` is never used [INFO] [stdout] --> src/lib.rs:148:4 [INFO] [stdout] | [INFO] [stdout] 148 | fn decompress(compressed: &[u8], huffman_codes: &HuffmanCodes, output_len: usize) -> Vec { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.71s [INFO] running `Command { std: "docker" "inspect" "81cbe57d4f25ef9e9f96f5a2cb493d356a090123b28dcc8b82482f2a7435698f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "81cbe57d4f25ef9e9f96f5a2cb493d356a090123b28dcc8b82482f2a7435698f", kill_on_drop: false }` [INFO] [stdout] 81cbe57d4f25ef9e9f96f5a2cb493d356a090123b28dcc8b82482f2a7435698f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 0f77f42bb036e19e44401f750c4c0be2d13d751f729f719ffe77db0ef2565599 [INFO] running `Command { std: "docker" "start" "-a" "0f77f42bb036e19e44401f750c4c0be2d13d751f729f719ffe77db0ef2565599", kill_on_drop: false }` [INFO] [stderr] warning: type alias `NodeRef` is never used [INFO] [stderr] --> src/lib.rs:8:6 [INFO] [stderr] | [INFO] [stderr] 8 | type NodeRef = Option>; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: type alias `HuffmanCodes` is never used [INFO] [stderr] --> src/lib.rs:9:6 [INFO] [stderr] | [INFO] [stderr] 9 | type HuffmanCodes = HashMap; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Node` is never constructed [INFO] [stderr] --> src/lib.rs:12:8 [INFO] [stderr] | [INFO] [stderr] 12 | struct Node { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function `new` is never used [INFO] [stderr] --> src/lib.rs:32:8 [INFO] [stderr] | [INFO] [stderr] 31 | impl Node { [INFO] [stderr] | --------- associated function in this implementation [INFO] [stderr] 32 | fn new(weight: i64, symbol: u8) -> Self { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `HuffmanCode` is never constructed [INFO] [stderr] --> src/lib.rs:43:8 [INFO] [stderr] | [INFO] [stderr] 43 | struct HuffmanCode { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: methods `push`, `bits`, and `clear` are never used [INFO] [stderr] --> src/lib.rs:55:8 [INFO] [stderr] | [INFO] [stderr] 54 | impl HuffmanCode { [INFO] [stderr] | ---------------- methods in this implementation [INFO] [stderr] 55 | fn push(mut self, bit: u8) -> Self { [INFO] [stderr] | ^^^^ [INFO] [stderr] ... [INFO] [stderr] 61 | fn bits(&self) -> Vec { [INFO] [stderr] | ^^^^ [INFO] [stderr] ... [INFO] [stderr] 67 | fn clear(&mut self) { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `generate_huffman` is never used [INFO] [stderr] --> src/lib.rs:73:4 [INFO] [stderr] | [INFO] [stderr] 73 | fn generate_huffman(s: &str) -> HuffmanCodes { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `create_codes` is never used [INFO] [stderr] --> src/lib.rs:111:4 [INFO] [stderr] | [INFO] [stderr] 111 | fn create_codes(code: HuffmanCode, mut root: Node, codes: &mut HuffmanCodes) { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `compress` is never used [INFO] [stderr] --> src/lib.rs:122:4 [INFO] [stderr] | [INFO] [stderr] 122 | fn compress(s: &str, huffman_codes: &HuffmanCodes) -> Vec { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `decompress` is never used [INFO] [stderr] --> src/lib.rs:148:4 [INFO] [stderr] | [INFO] [stderr] 148 | fn decompress(compressed: &[u8], huffman_codes: &HuffmanCodes, output_len: usize) -> Vec { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `huffman` (lib) generated 10 warnings [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/huffman-d48452f0b5b09b7f) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests::test_generate_huffman ... 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 huffman [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" "0f77f42bb036e19e44401f750c4c0be2d13d751f729f719ffe77db0ef2565599", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0f77f42bb036e19e44401f750c4c0be2d13d751f729f719ffe77db0ef2565599", kill_on_drop: false }` [INFO] [stdout] 0f77f42bb036e19e44401f750c4c0be2d13d751f729f719ffe77db0ef2565599