[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] building ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[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-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ArchismanKarmakar/Huffman-Encoding-Compression-Algorithm-in-RUST on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-3-tc1/source/Cargo.toml
[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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50456dd8fe282a919229e9adb4ecf10bbd4dd226cd0a6ad317bfbaf2c3a27edd
[INFO] running `Command { std: "docker" "start" "-a" "50456dd8fe282a919229e9adb4ecf10bbd4dd226cd0a6ad317bfbaf2c3a27edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50456dd8fe282a919229e9adb4ecf10bbd4dd226cd0a6ad317bfbaf2c3a27edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50456dd8fe282a919229e9adb4ecf10bbd4dd226cd0a6ad317bfbaf2c3a27edd", kill_on_drop: false }`
[INFO] [stdout] 50456dd8fe282a919229e9adb4ecf10bbd4dd226cd0a6ad317bfbaf2c3a27edd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22be2468c643eb353b98d70b03deaa960d91de3e3df64b89ebbc442b3ce19d50
[INFO] running `Command { std: "docker" "start" "-a" "22be2468c643eb353b98d70b03deaa960d91de3e3df64b89ebbc442b3ce19d50", 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 0.74s
[INFO] running `Command { std: "docker" "inspect" "22be2468c643eb353b98d70b03deaa960d91de3e3df64b89ebbc442b3ce19d50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22be2468c643eb353b98d70b03deaa960d91de3e3df64b89ebbc442b3ce19d50", kill_on_drop: false }`
[INFO] [stdout] 22be2468c643eb353b98d70b03deaa960d91de3e3df64b89ebbc442b3ce19d50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e062e13c3436d40092af97ba03e76e08f96432889d61607317d0246554562335
[INFO] running `Command { std: "docker" "start" "-a" "e062e13c3436d40092af97ba03e76e08f96432889d61607317d0246554562335", 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 0.45s
[INFO] running `Command { std: "docker" "inspect" "e062e13c3436d40092af97ba03e76e08f96432889d61607317d0246554562335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e062e13c3436d40092af97ba03e76e08f96432889d61607317d0246554562335", kill_on_drop: false }`
[INFO] [stdout] e062e13c3436d40092af97ba03e76e08f96432889d61607317d0246554562335
