[INFO] cloning repository https://github.com/fabio-gustav/HuffmanCodeRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fabio-gustav/HuffmanCodeRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabio-gustav%2FHuffmanCodeRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabio-gustav%2FHuffmanCodeRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 591fbb338161dd574102cad767a053e123d01f0e
[INFO] testing fabio-gustav/HuffmanCodeRust against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabio-gustav%2FHuffmanCodeRust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fabio-gustav/HuffmanCodeRust on toolchain ebf0cf75d368c035f4c7e7246d203bd469ee4a51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fabio-gustav/HuffmanCodeRust
[INFO] finished tweaking git repo https://github.com/fabio-gustav/HuffmanCodeRust
[INFO] tweaked toml for git repo https://github.com/fabio-gustav/HuffmanCodeRust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fabio-gustav/HuffmanCodeRust 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" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4b9fcfc75cb9c052bbd318551ef1a2dcbfabb7d159b1194b29f2f02a5b35b8f
[INFO] running `Command { std: "docker" "start" "-a" "e4b9fcfc75cb9c052bbd318551ef1a2dcbfabb7d159b1194b29f2f02a5b35b8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4b9fcfc75cb9c052bbd318551ef1a2dcbfabb7d159b1194b29f2f02a5b35b8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4b9fcfc75cb9c052bbd318551ef1a2dcbfabb7d159b1194b29f2f02a5b35b8f", kill_on_drop: false }`
[INFO] [stdout] e4b9fcfc75cb9c052bbd318551ef1a2dcbfabb7d159b1194b29f2f02a5b35b8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0050c9da6b59238aa2a746263f656e0eeaab17cd95aadc61a4773fa519077f2
[INFO] running `Command { std: "docker" "start" "-a" "b0050c9da6b59238aa2a746263f656e0eeaab17cd95aadc61a4773fa519077f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling HuffmanCodeRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn decode(to_decode: String, root: &Box<Node>) -> String{
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "b0050c9da6b59238aa2a746263f656e0eeaab17cd95aadc61a4773fa519077f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0050c9da6b59238aa2a746263f656e0eeaab17cd95aadc61a4773fa519077f2", kill_on_drop: false }`
[INFO] [stdout] b0050c9da6b59238aa2a746263f656e0eeaab17cd95aadc61a4773fa519077f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c74d687cc799ec74633e05abcb562a9788b0de50173377b84b73da565da75350
[INFO] running `Command { std: "docker" "start" "-a" "c74d687cc799ec74633e05abcb562a9788b0de50173377b84b73da565da75350", kill_on_drop: false }`
[INFO] [stderr]    Compiling HuffmanCodeRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn decode(to_decode: String, root: &Box<Node>) -> String{
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "c74d687cc799ec74633e05abcb562a9788b0de50173377b84b73da565da75350", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c74d687cc799ec74633e05abcb562a9788b0de50173377b84b73da565da75350", kill_on_drop: false }`
[INFO] [stdout] c74d687cc799ec74633e05abcb562a9788b0de50173377b84b73da565da75350
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e7e4e395881030e2dcf571a5a26fcdce761d1b8ab73712556ce983d874fffa13
[INFO] running `Command { std: "docker" "start" "-a" "e7e4e395881030e2dcf571a5a26fcdce761d1b8ab73712556ce983d874fffa13", kill_on_drop: false }`
[INFO] [stderr] warning: function `decode` is never used
[INFO] [stderr]   --> src/main.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn decode(to_decode: String, root: &Box<Node>) -> String{
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `HuffmanCodeRust` (bin "HuffmanCodeRust" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/HuffmanCodeRust-6da5f3988063eaa3)
[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" "e7e4e395881030e2dcf571a5a26fcdce761d1b8ab73712556ce983d874fffa13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7e4e395881030e2dcf571a5a26fcdce761d1b8ab73712556ce983d874fffa13", kill_on_drop: false }`
[INFO] [stdout] e7e4e395881030e2dcf571a5a26fcdce761d1b8ab73712556ce983d874fffa13