[INFO] cloning repository https://github.com/mpdrescher/huffman-compression
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpdrescher/huffman-compression" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Fhuffman-compression", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Fhuffman-compression'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f7270fd9505444ab81fa668aac53c656adf94f96
[INFO] checking mpdrescher/huffman-compression against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Fhuffman-compression" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mpdrescher/huffman-compression on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mpdrescher/huffman-compression
[INFO] finished tweaking git repo https://github.com/mpdrescher/huffman-compression
[INFO] tweaked toml for git repo https://github.com/mpdrescher/huffman-compression written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/mpdrescher/huffman-compression already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6eeddf50f3629fa0d3375bc7e4f9eb66919b71acf66d08ae7905ad904d4b9cce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6eeddf50f3629fa0d3375bc7e4f9eb66919b71acf66d08ae7905ad904d4b9cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6eeddf50f3629fa0d3375bc7e4f9eb66919b71acf66d08ae7905ad904d4b9cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eeddf50f3629fa0d3375bc7e4f9eb66919b71acf66d08ae7905ad904d4b9cce", kill_on_drop: false }`
[INFO] [stdout] 6eeddf50f3629fa0d3375bc7e4f9eb66919b71acf66d08ae7905ad904d4b9cce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1147e8acf468be0886d781b101d1ebfadb0660b40873304ca492a10f85cf1f03
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1147e8acf468be0886d781b101d1ebfadb0660b40873304ca492a10f85cf1f03", kill_on_drop: false }`
[INFO] [stderr]     Checking huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/compression.rs:25:41
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn decompress(data: Data) -> Option<(Data)>//Option<Data>
[INFO] [stdout]    |                                         ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:105:17
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut file = try!(File::create(get_compressed_file_name(filepath)));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:106:2
[INFO] [stdout]     |
[INFO] [stdout] 106 |     try!(file.write_all(content.as_slice()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let mut file = try!(File::create(filepath));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:113:2
[INFO] [stdout]     |
[INFO] [stdout] 113 |     try!(file.write_all(data.as_slice()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/compression.rs:25:41
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn decompress(data: Data) -> Option<(Data)>//Option<Data>
[INFO] [stdout]    |                                         ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:105:17
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut file = try!(File::create(get_compressed_file_name(filepath)));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:106:2
[INFO] [stdout]     |
[INFO] [stdout] 106 |     try!(file.write_all(content.as_slice()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let mut file = try!(File::create(filepath));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:113:2
[INFO] [stdout]     |
[INFO] [stdout] 113 |     try!(file.write_all(data.as_slice()));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cur_byte` is never read
[INFO] [stdout]    --> src/huffmantree.rs:188:11
[INFO] [stdout]     |
[INFO] [stdout] 188 |         let mut cur_byte: u8 = 4;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cur_byte` is never read
[INFO] [stdout]    --> src/huffmantree.rs:188:11
[INFO] [stdout]     |
[INFO] [stdout] 188 |         let mut cur_byte: u8 = 4;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "1147e8acf468be0886d781b101d1ebfadb0660b40873304ca492a10f85cf1f03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1147e8acf468be0886d781b101d1ebfadb0660b40873304ca492a10f85cf1f03", kill_on_drop: false }`
[INFO] [stdout] 1147e8acf468be0886d781b101d1ebfadb0660b40873304ca492a10f85cf1f03