[INFO] cloning repository https://github.com/haran2001/huffman-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/haran2001/huffman-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharan2001%2Fhuffman-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharan2001%2Fhuffman-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cab5084db38090342d243c64b418307d889eda4c
[INFO] testing haran2001/huffman-rust against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharan2001%2Fhuffman-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/haran2001/huffman-rust
[INFO] finished tweaking git repo https://github.com/haran2001/huffman-rust
[INFO] tweaked toml for git repo https://github.com/haran2001/huffman-rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/haran2001/huffman-rust on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/haran2001/huffman-rust 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 962a2199b6fd5903e3378329afd279cca214b41b8bd67052b2451f8cf0605633
[INFO] running `Command { std: "docker" "start" "-a" "962a2199b6fd5903e3378329afd279cca214b41b8bd67052b2451f8cf0605633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "962a2199b6fd5903e3378329afd279cca214b41b8bd67052b2451f8cf0605633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "962a2199b6fd5903e3378329afd279cca214b41b8bd67052b2451f8cf0605633", kill_on_drop: false }`
[INFO] [stdout] 962a2199b6fd5903e3378329afd279cca214b41b8bd67052b2451f8cf0605633
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50d05f9fa5d1b6eeed9f8550a90758fc2c252e7e5095783159c73e7e8e87cac9
[INFO] running `Command { std: "docker" "start" "-a" "50d05f9fa5d1b6eeed9f8550a90758fc2c252e7e5095783159c73e7e8e87cac9", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitvector v0.1.5
[INFO] [stderr]    Compiling bit-vec v0.8.0
[INFO] [stderr]    Compiling compress v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `huffman::Tree`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use huffman::Tree;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BinaryHeap`, `HashMap`, and `cmp::Reverse`
[INFO] [stdout]  --> src/huffman.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cmp::Reverse,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 3 |     collections::{BinaryHeap, HashMap},
[INFO] [stdout]   |                   ^^^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `decoding_table`
[INFO] [stdout]   --> src/main.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let decoding_table = create_decoding_table(&tokens);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_decoding_table`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Node` and `Leaf` are never constructed
[INFO] [stdout]   --> src/huffman.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub enum Tree<T> {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] 10 |     Node {
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     Leaf {
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tree` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "50d05f9fa5d1b6eeed9f8550a90758fc2c252e7e5095783159c73e7e8e87cac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50d05f9fa5d1b6eeed9f8550a90758fc2c252e7e5095783159c73e7e8e87cac9", kill_on_drop: false }`
[INFO] [stdout] 50d05f9fa5d1b6eeed9f8550a90758fc2c252e7e5095783159c73e7e8e87cac9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ae049294ad2f9936c87fb76ec0447874d59b47cdf816e9fca1f57af58f70cbc
[INFO] running `Command { std: "docker" "start" "-a" "7ae049294ad2f9936c87fb76ec0447874d59b47cdf816e9fca1f57af58f70cbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling compress v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `huffman::Tree`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use huffman::Tree;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BinaryHeap`, `HashMap`, and `cmp::Reverse`
[INFO] [stdout]  --> src/huffman.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cmp::Reverse,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 3 |     collections::{BinaryHeap, HashMap},
[INFO] [stdout]   |                   ^^^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `decoding_table`
[INFO] [stdout]   --> src/main.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let decoding_table = create_decoding_table(&tokens);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_decoding_table`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Node` and `Leaf` are never constructed
[INFO] [stdout]   --> src/huffman.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub enum Tree<T> {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] 10 |     Node {
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     Leaf {
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tree` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "7ae049294ad2f9936c87fb76ec0447874d59b47cdf816e9fca1f57af58f70cbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ae049294ad2f9936c87fb76ec0447874d59b47cdf816e9fca1f57af58f70cbc", kill_on_drop: false }`
[INFO] [stdout] 7ae049294ad2f9936c87fb76ec0447874d59b47cdf816e9fca1f57af58f70cbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 341a2523013346eaf5b50053ef5dd25241eee05989950001692b19c4b34ebae3
[INFO] running `Command { std: "docker" "start" "-a" "341a2523013346eaf5b50053ef5dd25241eee05989950001692b19c4b34ebae3", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `huffman::Tree`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use huffman::Tree;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BinaryHeap`, `HashMap`, and `cmp::Reverse`
[INFO] [stderr]  --> src/huffman.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     cmp::Reverse,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 3 |     collections::{BinaryHeap, HashMap},
[INFO] [stderr]   |                   ^^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `decoding_table`
[INFO] [stderr]   --> src/main.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |     let decoding_table = create_decoding_table(&tokens);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_decoding_table`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Node` and `Leaf` are never constructed
[INFO] [stderr]   --> src/huffman.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr]  9 | pub enum Tree<T> {
[INFO] [stderr]    |          ---- variants in this enum
[INFO] [stderr] 10 |     Node {
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 15 |     Leaf {
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Tree` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `compress` (bin "compress" test) generated 4 warnings (run `cargo fix --bin "compress" -p compress --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/compress-ff89b71b0ee34816)
[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" "341a2523013346eaf5b50053ef5dd25241eee05989950001692b19c4b34ebae3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "341a2523013346eaf5b50053ef5dd25241eee05989950001692b19c4b34ebae3", kill_on_drop: false }`
[INFO] [stdout] 341a2523013346eaf5b50053ef5dd25241eee05989950001692b19c4b34ebae3