[INFO] updating cached repository https://github.com/mpdrescher/huffman-compression
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f7270fd9505444ab81fa668aac53c656adf94f96
[INFO] testing mpdrescher/huffman-compression against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Fhuffman-compression" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mpdrescher/huffman-compression on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/mpdrescher/huffman-compression already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 3d7aaea9f282d1692d81026958834c5e7763035079bf6483e503a54f78968f19
[INFO] running `"docker" "start" "-a" "3d7aaea9f282d1692d81026958834c5e7763035079bf6483e503a54f78968f19"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let mut file = try!(File::create(get_compressed_file_name(filepath)));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:106:2
[INFO] [stderr]     |
[INFO] [stderr] 106 |     try!(file.write_all(content.as_slice()));
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |     let mut file = try!(File::create(filepath));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:113:2
[INFO] [stderr]     |
[INFO] [stderr] 113 |     try!(file.write_all(data.as_slice()));
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `cur_byte` is never read
[INFO] [stderr]    --> src/huffmantree.rs:188:11
[INFO] [stderr]     |
[INFO] [stderr] 188 |         let mut cur_byte: u8 = 4;
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "3d7aaea9f282d1692d81026958834c5e7763035079bf6483e503a54f78968f19"`
[INFO] running `"docker" "rm" "-f" "3d7aaea9f282d1692d81026958834c5e7763035079bf6483e503a54f78968f19"`
[INFO] [stdout] 3d7aaea9f282d1692d81026958834c5e7763035079bf6483e503a54f78968f19
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4810e8a85e38e1cee49a03ded0a2f8809e1ef253df50badc6b06e440f3ef2eec
[INFO] running `"docker" "start" "-a" "4810e8a85e38e1cee49a03ded0a2f8809e1ef253df50badc6b06e440f3ef2eec"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let mut file = try!(File::create(get_compressed_file_name(filepath)));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:106:2
[INFO] [stderr]     |
[INFO] [stderr] 106 |     try!(file.write_all(content.as_slice()));
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |     let mut file = try!(File::create(filepath));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:113:2
[INFO] [stderr]     |
[INFO] [stderr] 113 |     try!(file.write_all(data.as_slice()));
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `cur_byte` is never read
[INFO] [stderr]    --> src/huffmantree.rs:188:11
[INFO] [stderr]     |
[INFO] [stderr] 188 |         let mut cur_byte: u8 = 4;
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "4810e8a85e38e1cee49a03ded0a2f8809e1ef253df50badc6b06e440f3ef2eec"`
[INFO] running `"docker" "rm" "-f" "4810e8a85e38e1cee49a03ded0a2f8809e1ef253df50badc6b06e440f3ef2eec"`
[INFO] [stdout] 4810e8a85e38e1cee49a03ded0a2f8809e1ef253df50badc6b06e440f3ef2eec
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] bef0dcf5623091b39e53b669ab29964804b8eb02a8c996bab2ef200532fe5beb
[INFO] running `"docker" "start" "-a" "bef0dcf5623091b39e53b669ab29964804b8eb02a8c996bab2ef200532fe5beb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/huffman-3eb3f1ae0e41f2d8
[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" "bef0dcf5623091b39e53b669ab29964804b8eb02a8c996bab2ef200532fe5beb"`
[INFO] running `"docker" "rm" "-f" "bef0dcf5623091b39e53b669ab29964804b8eb02a8c996bab2ef200532fe5beb"`
[INFO] [stdout] bef0dcf5623091b39e53b669ab29964804b8eb02a8c996bab2ef200532fe5beb