[INFO] cloning repository https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArchismanKarmakar%2FHuffman-Encoding-Compression-Algorithm-in-RUST", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArchismanKarmakar%2FHuffman-Encoding-Compression-Algorithm-in-RUST'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 507f7f0765636d191e0d5f59a56d3f66dae4bcf0
[INFO] testing ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArchismanKarmakar%2FHuffman-Encoding-Compression-Algorithm-in-RUST" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST
[INFO] finished tweaking git repo https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST
[INFO] tweaked toml for git repo https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e8e5f5787568b20a1b46169e1c91fe32c365a831baab23f8fdc1203b1afcb32
[INFO] running `Command { std: "docker" "start" "-a" "5e8e5f5787568b20a1b46169e1c91fe32c365a831baab23f8fdc1203b1afcb32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e8e5f5787568b20a1b46169e1c91fe32c365a831baab23f8fdc1203b1afcb32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e8e5f5787568b20a1b46169e1c91fe32c365a831baab23f8fdc1203b1afcb32", kill_on_drop: false }`
[INFO] [stdout] 5e8e5f5787568b20a1b46169e1c91fe32c365a831baab23f8fdc1203b1afcb32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be717fe484de0792c57a7d92e4647f1b2078d35cea5f745a45e9efef04db5afe
[INFO] running `Command { std: "docker" "start" "-a" "be717fe484de0792c57a7d92e4647f1b2078d35cea5f745a45e9efef04db5afe", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman-compression-rust v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/huffman.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]   --> src/huffman.rs:12:44
[INFO] [stdout]    |
[INFO] [stdout] 12 |         use std::collections::{BinaryHeap, HashMap};
[INFO] [stdout]    |                                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> src/huffman.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         use std::ops::Deref;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/huffman.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let mut frequency_table = match binary {
[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: variable `Q` should have a snake case name
[INFO] [stdout]   --> src/huffman.rs:90:21
[INFO] [stdout]    |
[INFO] [stdout] 90 |             let mut Q = BinaryHeap::new();
[INFO] [stdout]    |                     ^ help: convert the identifier to snake case: `q`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q` should have a snake case name
[INFO] [stdout]    --> src/huffman.rs:128:21
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut Q = self::build_min_heap(&frequency_table);
[INFO] [stdout]     |                     ^ help: convert the identifier to snake case: `q`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "be717fe484de0792c57a7d92e4647f1b2078d35cea5f745a45e9efef04db5afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be717fe484de0792c57a7d92e4647f1b2078d35cea5f745a45e9efef04db5afe", kill_on_drop: false }`
[INFO] [stdout] be717fe484de0792c57a7d92e4647f1b2078d35cea5f745a45e9efef04db5afe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42a28ff168aeff696c942080dce224bec220e0df6f5823aa886d1d82ee8b1ee9
[INFO] running `Command { std: "docker" "start" "-a" "42a28ff168aeff696c942080dce224bec220e0df6f5823aa886d1d82ee8b1ee9", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman-compression-rust v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/huffman.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]   --> src/huffman.rs:12:44
[INFO] [stdout]    |
[INFO] [stdout] 12 |         use std::collections::{BinaryHeap, HashMap};
[INFO] [stdout]    |                                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> src/huffman.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         use std::ops::Deref;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/huffman.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let mut frequency_table = match binary {
[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: variable `Q` should have a snake case name
[INFO] [stdout]   --> src/huffman.rs:90:21
[INFO] [stdout]    |
[INFO] [stdout] 90 |             let mut Q = BinaryHeap::new();
[INFO] [stdout]    |                     ^ help: convert the identifier to snake case: `q`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q` should have a snake case name
[INFO] [stdout]    --> src/huffman.rs:128:21
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut Q = self::build_min_heap(&frequency_table);
[INFO] [stdout]     |                     ^ help: convert the identifier to snake case: `q`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "42a28ff168aeff696c942080dce224bec220e0df6f5823aa886d1d82ee8b1ee9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a28ff168aeff696c942080dce224bec220e0df6f5823aa886d1d82ee8b1ee9", kill_on_drop: false }`
[INFO] [stdout] 42a28ff168aeff696c942080dce224bec220e0df6f5823aa886d1d82ee8b1ee9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d8c0eb4b33ba6666291b9fdee1f6983de2f50217f1a4f4f139cccac6b7f0162e
[INFO] running `Command { std: "docker" "start" "-a" "d8c0eb4b33ba6666291b9fdee1f6983de2f50217f1a4f4f139cccac6b7f0162e", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/huffman.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     use std::io;
[INFO] [stderr]   |         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]   --> src/huffman.rs:12:44
[INFO] [stderr]    |
[INFO] [stderr] 12 |         use std::collections::{BinaryHeap, HashMap};
[INFO] [stderr]    |                                            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/huffman.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         use std::ops::Deref;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/huffman.rs:249:13
[INFO] [stderr]     |
[INFO] [stderr] 249 |         let mut frequency_table = match binary {
[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: variable `Q` should have a snake case name
[INFO] [stderr]   --> src/huffman.rs:90:21
[INFO] [stderr]    |
[INFO] [stderr] 90 |             let mut Q = BinaryHeap::new();
[INFO] [stderr]    |                     ^ help: convert the identifier to snake case: `q`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Q` should have a snake case name
[INFO] [stderr]    --> src/huffman.rs:128:21
[INFO] [stderr]     |
[INFO] [stderr] 128 |             let mut Q = self::build_min_heap(&frequency_table);
[INFO] [stderr]     |                     ^ help: convert the identifier to snake case: `q`
[INFO] [stderr] 
[INFO] [stderr] warning: `huffman-compression-rust` (bin "huffman-compression-rust" test) generated 6 warnings (run `cargo fix --bin "huffman-compression-rust" --tests` to apply 4 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/huffman_compression_rust-6389002e53eff143)
[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" "d8c0eb4b33ba6666291b9fdee1f6983de2f50217f1a4f4f139cccac6b7f0162e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8c0eb4b33ba6666291b9fdee1f6983de2f50217f1a4f4f139cccac6b7f0162e", kill_on_drop: false }`
[INFO] [stdout] d8c0eb4b33ba6666291b9fdee1f6983de2f50217f1a4f4f139cccac6b7f0162e
