[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] checking ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST against master#32cd9114712a24010b0583624dc52ac302194128 for pr-143717
[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 32cd9114712a24010b0583624dc52ac302194128
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "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" "+32cd9114712a24010b0583624dc52ac302194128" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab928ec49a504ec753561528883ef9e2ec0ad46d34c079826e26a1fee29a9279
[INFO] running `Command { std: "docker" "start" "-a" "ab928ec49a504ec753561528883ef9e2ec0ad46d34c079826e26a1fee29a9279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab928ec49a504ec753561528883ef9e2ec0ad46d34c079826e26a1fee29a9279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab928ec49a504ec753561528883ef9e2ec0ad46d34c079826e26a1fee29a9279", kill_on_drop: false }`
[INFO] [stdout] ab928ec49a504ec753561528883ef9e2ec0ad46d34c079826e26a1fee29a9279
[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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c89062ee79063fdf6553d73f684c40609736b192ba8bbfa381d8e394a7fcca2
[INFO] running `Command { std: "docker" "start" "-a" "1c89062ee79063fdf6553d73f684c40609736b192ba8bbfa381d8e394a7fcca2", kill_on_drop: false }`
[INFO] [stderr]     Checking 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: 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] [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 0.28s
[INFO] running `Command { std: "docker" "inspect" "1c89062ee79063fdf6553d73f684c40609736b192ba8bbfa381d8e394a7fcca2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c89062ee79063fdf6553d73f684c40609736b192ba8bbfa381d8e394a7fcca2", kill_on_drop: false }`
[INFO] [stdout] 1c89062ee79063fdf6553d73f684c40609736b192ba8bbfa381d8e394a7fcca2
