[INFO] updating cached repository TechnoCrunch/huffman-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TechnoCrunch/huffman-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TechnoCrunch/huffman-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/TechnoCrunch/huffman-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/TechnoCrunch/huffman-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TechnoCrunch/huffman-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TechnoCrunch/huffman-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TechnoCrunch/huffman-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9873df86b7f1175b7797e634811ed0887fa53532
[INFO] sha for GitHub repo TechnoCrunch/huffman-rs: 9873df86b7f1175b7797e634811ed0887fa53532
[INFO] validating manifest of TechnoCrunch/huffman-rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of TechnoCrunch/huffman-rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing TechnoCrunch/huffman-rs
[INFO] finished frobbing TechnoCrunch/huffman-rs
[INFO] frobbed toml for TechnoCrunch/huffman-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/TechnoCrunch/huffman-rs/Cargo.toml
[INFO] started frobbing TechnoCrunch/huffman-rs
[INFO] finished frobbing TechnoCrunch/huffman-rs
[INFO] frobbed toml for TechnoCrunch/huffman-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TechnoCrunch/huffman-rs/Cargo.toml
[INFO] crate TechnoCrunch/huffman-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing TechnoCrunch/huffman-rs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TechnoCrunch/huffman-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] d8316dc295bfa1b80f88c7d03ecb11431266e5692ce0c7d3e095f3ff6f1f2dc9
[INFO] running `"docker" "start" "-a" "d8316dc295bfa1b80f88c7d03ecb11431266e5692ce0c7d3e095f3ff6f1f2dc9"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:65:43
[INFO] [stderr]    |
[INFO] [stderr] 65 |             generate_code(l, huffman_map, (s.clone() + "0"));
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:68:43
[INFO] [stderr]    |
[INFO] [stderr] 68 |             generate_code(r, huffman_map, (s.clone() + "1"));
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `"docker" "inspect" "d8316dc295bfa1b80f88c7d03ecb11431266e5692ce0c7d3e095f3ff6f1f2dc9"`
[INFO] running `"docker" "rm" "-f" "d8316dc295bfa1b80f88c7d03ecb11431266e5692ce0c7d3e095f3ff6f1f2dc9"`
[INFO] [stdout] d8316dc295bfa1b80f88c7d03ecb11431266e5692ce0c7d3e095f3ff6f1f2dc9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TechnoCrunch/huffman-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 025fd0ceefb7dc99674f282412d7e940ed57efa24bfd7eb6381bf8262796ea8e
[INFO] running `"docker" "start" "-a" "025fd0ceefb7dc99674f282412d7e940ed57efa24bfd7eb6381bf8262796ea8e"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:65:43
[INFO] [stderr]    |
[INFO] [stderr] 65 |             generate_code(l, huffman_map, (s.clone() + "0"));
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:68:43
[INFO] [stderr]    |
[INFO] [stderr] 68 |             generate_code(r, huffman_map, (s.clone() + "1"));
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "025fd0ceefb7dc99674f282412d7e940ed57efa24bfd7eb6381bf8262796ea8e"`
[INFO] running `"docker" "rm" "-f" "025fd0ceefb7dc99674f282412d7e940ed57efa24bfd7eb6381bf8262796ea8e"`
[INFO] [stdout] 025fd0ceefb7dc99674f282412d7e940ed57efa24bfd7eb6381bf8262796ea8e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TechnoCrunch/huffman-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] f4d4dcada6552566308aa96dae9412414660571e2ac3846d92370ff67594ac2b
[INFO] running `"docker" "start" "-a" "f4d4dcada6552566308aa96dae9412414660571e2ac3846d92370ff67594ac2b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/huffman-e5f61963b4a84113
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f4d4dcada6552566308aa96dae9412414660571e2ac3846d92370ff67594ac2b"`
[INFO] running `"docker" "rm" "-f" "f4d4dcada6552566308aa96dae9412414660571e2ac3846d92370ff67594ac2b"`
[INFO] [stdout] f4d4dcada6552566308aa96dae9412414660571e2ac3846d92370ff67594ac2b