[INFO] cloning repository https://github.com/yassineZakhama/huffcompressor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yassineZakhama/huffcompressor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FyassineZakhama%2Fhuffcompressor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FyassineZakhama%2Fhuffcompressor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e57384278555c0d19c3d9963e3e1b91197147f80
[INFO] checking yassineZakhama/huffcompressor against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FyassineZakhama%2Fhuffcompressor" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yassineZakhama/huffcompressor
[INFO] finished tweaking git repo https://github.com/yassineZakhama/huffcompressor
[INFO] tweaked toml for git repo https://github.com/yassineZakhama/huffcompressor written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yassineZakhama/huffcompressor on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yassineZakhama/huffcompressor 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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad685e3b5117e1c1d43068dca9ca7ef9bb8c5e86c95e4f6293adeff569dd783e
[INFO] running `Command { std: "docker" "start" "-a" "ad685e3b5117e1c1d43068dca9ca7ef9bb8c5e86c95e4f6293adeff569dd783e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad685e3b5117e1c1d43068dca9ca7ef9bb8c5e86c95e4f6293adeff569dd783e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad685e3b5117e1c1d43068dca9ca7ef9bb8c5e86c95e4f6293adeff569dd783e", kill_on_drop: false }`
[INFO] [stdout] ad685e3b5117e1c1d43068dca9ca7ef9bb8c5e86c95e4f6293adeff569dd783e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b217db2965fa81ac488027130a607f47031e413272084134387dc2329d050964
[INFO] running `Command { std: "docker" "start" "-a" "b217db2965fa81ac488027130a607f47031e413272084134387dc2329d050964", kill_on_drop: false }`
[INFO] [stderr]     Checking huffcompressor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `HuffBaseNode` is never used
[INFO] [stdout]  --> src/huffmantree.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait HuffBaseNode {
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HuffInternalNode` is never constructed
[INFO] [stdout]  --> src/huffmantree/internalnode.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct HuffInternalNode {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `left`, and `right` are never used
[INFO] [stdout]   --> src/huffmantree/internalnode.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl HuffInternalNode {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 10 |     fn new(weight: i32, left: Box<dyn HuffBaseNode>, right: Box<dyn HuffBaseNode>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn left(&self) -> &Box<dyn HuffBaseNode> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn right(&self) -> &Box<dyn HuffBaseNode> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HuffLeafNode` is never constructed
[INFO] [stdout]  --> src/huffmantree/leafnode.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct HuffLeafNode {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/huffmantree/leafnode.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl HuffLeafNode {
[INFO] [stdout]   | ----------------- associated function in this implementation
[INFO] [stdout] 9 |     fn new(element: char, weight: i32) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `HuffBaseNode` is never used
[INFO] [stdout]  --> src/huffmantree.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait HuffBaseNode {
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HuffInternalNode` is never constructed
[INFO] [stdout]  --> src/huffmantree/internalnode.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct HuffInternalNode {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `left`, and `right` are never used
[INFO] [stdout]   --> src/huffmantree/internalnode.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl HuffInternalNode {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 10 |     fn new(weight: i32, left: Box<dyn HuffBaseNode>, right: Box<dyn HuffBaseNode>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn left(&self) -> &Box<dyn HuffBaseNode> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn right(&self) -> &Box<dyn HuffBaseNode> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HuffLeafNode` is never constructed
[INFO] [stdout]  --> src/huffmantree/leafnode.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct HuffLeafNode {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/huffmantree/leafnode.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl HuffLeafNode {
[INFO] [stdout]   | ----------------- associated function in this implementation
[INFO] [stdout] 9 |     fn new(element: char, weight: i32) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "b217db2965fa81ac488027130a607f47031e413272084134387dc2329d050964", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b217db2965fa81ac488027130a607f47031e413272084134387dc2329d050964", kill_on_drop: false }`
[INFO] [stdout] b217db2965fa81ac488027130a607f47031e413272084134387dc2329d050964
