[INFO] cloning repository https://github.com/BrysonSmith15/Huffman-Encoding-Tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BrysonSmith15/Huffman-Encoding-Tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBrysonSmith15%2FHuffman-Encoding-Tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBrysonSmith15%2FHuffman-Encoding-Tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 684e7ff2b36f5045a757584ba4df13ca18c5b70c
[INFO] checking BrysonSmith15/Huffman-Encoding-Tree/684e7ff2b36f5045a757584ba4df13ca18c5b70c against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBrysonSmith15%2FHuffman-Encoding-Tree" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/BrysonSmith15/Huffman-Encoding-Tree on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BrysonSmith15/Huffman-Encoding-Tree
[INFO] finished tweaking git repo https://github.com/BrysonSmith15/Huffman-Encoding-Tree
[INFO] tweaked toml for git repo https://github.com/BrysonSmith15/Huffman-Encoding-Tree written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/BrysonSmith15/Huffman-Encoding-Tree 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9ce8bf8a16cc7c27237b754649e592272056d9d8ee832866a3dbbe78c95688d
[INFO] running `Command { std: "docker" "start" "-a" "d9ce8bf8a16cc7c27237b754649e592272056d9d8ee832866a3dbbe78c95688d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9ce8bf8a16cc7c27237b754649e592272056d9d8ee832866a3dbbe78c95688d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9ce8bf8a16cc7c27237b754649e592272056d9d8ee832866a3dbbe78c95688d", kill_on_drop: false }`
[INFO] [stdout] d9ce8bf8a16cc7c27237b754649e592272056d9d8ee832866a3dbbe78c95688d
[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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37d29d5ae75d3be058645f8f54bdf7d7fd0c41b97315c7beac4365916ea597bd
[INFO] running `Command { std: "docker" "start" "-a" "37d29d5ae75d3be058645f8f54bdf7d7fd0c41b97315c7beac4365916ea597bd", kill_on_drop: false }`
[INFO] [stderr]     Checking huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `decode` and `vu8_to_bitvec` are never used
[INFO] [stdout]    --> src/huffman_tree.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 12  | impl HuffmanTree {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub fn decode(&self, mut encoded: Vec<u8>) -> String {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 153 |     pub fn vu8_to_bitvec(&self, encoded: Vec<u8>) -> Result<BitVec, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `decode` and `vu8_to_bitvec` are never used
[INFO] [stdout]    --> src/huffman_tree.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 12  | impl HuffmanTree {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub fn decode(&self, mut encoded: Vec<u8>) -> String {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 153 |     pub fn vu8_to_bitvec(&self, encoded: Vec<u8>) -> Result<BitVec, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "37d29d5ae75d3be058645f8f54bdf7d7fd0c41b97315c7beac4365916ea597bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37d29d5ae75d3be058645f8f54bdf7d7fd0c41b97315c7beac4365916ea597bd", kill_on_drop: false }`
[INFO] [stdout] 37d29d5ae75d3be058645f8f54bdf7d7fd0c41b97315c7beac4365916ea597bd