[INFO] cloning repository https://github.com/AlexisInsMu/huffman_coder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlexisInsMu/huffman_coder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexisInsMu%2Fhuffman_coder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexisInsMu%2Fhuffman_coder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1e3092d77f3c16a29191b9689c351f5a853834b
[INFO] checking AlexisInsMu/huffman_coder against master#a26e97be8826d408309fffbd8168362365719f50 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexisInsMu%2Fhuffman_coder" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AlexisInsMu/huffman_coder on toolchain a26e97be8826d408309fffbd8168362365719f50
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AlexisInsMu/huffman_coder
[INFO] finished tweaking git repo https://github.com/AlexisInsMu/huffman_coder
[INFO] tweaked toml for git repo https://github.com/AlexisInsMu/huffman_coder written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/AlexisInsMu/huffman_coder 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" "+a26e97be8826d408309fffbd8168362365719f50" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5091b66c52d47dc8773b0fbe2b263ff8112218eed8191b2e92204457d5806d0f
[INFO] running `Command { std: "docker" "start" "-a" "5091b66c52d47dc8773b0fbe2b263ff8112218eed8191b2e92204457d5806d0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5091b66c52d47dc8773b0fbe2b263ff8112218eed8191b2e92204457d5806d0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5091b66c52d47dc8773b0fbe2b263ff8112218eed8191b2e92204457d5806d0f", kill_on_drop: false }`
[INFO] [stdout] 5091b66c52d47dc8773b0fbe2b263ff8112218eed8191b2e92204457d5806d0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdef23bda256dbe109a23ffd24d252c9ed1e5e84b72da0ec697c2da66af83882
[INFO] running `Command { std: "docker" "start" "-a" "bdef23bda256dbe109a23ffd24d252c9ed1e5e84b72da0ec697c2da66af83882", kill_on_drop: false }`
[INFO] [stderr]     Checking huffman_coder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `codes`
[INFO] [stdout]    --> src/lib.rs:107:10
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_codes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:107:18
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/lib.rs:156:12
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iscorrect`
[INFO] [stdout]    --> src/lib.rs:156:16
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iscorrect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]    --> src/lib.rs:126:28
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn encode(input: &str, file_name: String) -> i64 {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `deserialize` is never used
[INFO] [stdout]   --> src/lib.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Node{
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn deserialize(buffer: &mut &[u8]) -> Option<Box<Node>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_tree_and_text_from_file` is never used
[INFO] [stdout]    --> src/lib.rs:180:4
[INFO] [stdout]     |
[INFO] [stdout] 180 | fn load_tree_and_text_from_file(file_name: &str) -> Result<(Option<Box<Node>>, String)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `codes`
[INFO] [stdout]    --> src/lib.rs:107:10
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_codes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:107:18
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/lib.rs:156:12
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iscorrect`
[INFO] [stdout]    --> src/lib.rs:156:16
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iscorrect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]    --> src/lib.rs:126:28
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn encode(input: &str, file_name: String) -> i64 {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "bdef23bda256dbe109a23ffd24d252c9ed1e5e84b72da0ec697c2da66af83882", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdef23bda256dbe109a23ffd24d252c9ed1e5e84b72da0ec697c2da66af83882", kill_on_drop: false }`
[INFO] [stdout] bdef23bda256dbe109a23ffd24d252c9ed1e5e84b72da0ec697c2da66af83882
