[INFO] updating cached repository PeterCxy/huffman-coding-cse104-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PeterCxy/huffman-coding-cse104-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PeterCxy/huffman-coding-cse104-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/PeterCxy/huffman-coding-cse104-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/PeterCxy/huffman-coding-cse104-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PeterCxy/huffman-coding-cse104-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PeterCxy/huffman-coding-cse104-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PeterCxy/huffman-coding-cse104-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f8dae1c157f776aaa7c340f21ebca5741efc6893
[INFO] sha for GitHub repo PeterCxy/huffman-coding-cse104-rust: f8dae1c157f776aaa7c340f21ebca5741efc6893
[INFO] validating manifest of PeterCxy/huffman-coding-cse104-rust 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 PeterCxy/huffman-coding-cse104-rust 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 PeterCxy/huffman-coding-cse104-rust
[INFO] finished frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] frobbed toml for PeterCxy/huffman-coding-cse104-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/PeterCxy/huffman-coding-cse104-rust/Cargo.toml
[INFO] started frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] finished frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] frobbed toml for PeterCxy/huffman-coding-cse104-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PeterCxy/huffman-coding-cse104-rust/Cargo.toml
[INFO] crate PeterCxy/huffman-coding-cse104-rust 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 PeterCxy/huffman-coding-cse104-rust 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/PeterCxy/huffman-coding-cse104-rust:/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] 0ade5245388ab57173e05a8a6126f4d6c6b80d4ce1ac1249fec509ed9a44d433
[INFO] running `"docker" "start" "-a" "0ade5245388ab57173e05a8a6126f4d6c6b80d4ce1ac1249fec509ed9a44d433"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traversal.rs:50:47
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn visit_node<'b>(&'b mut self, node: &'a TraversableNode) -> Option<Result<(BitVec<u32>, u8), TreeTraverser<'a>>> {
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:177:49
[INFO] [stderr]     |
[INFO] [stderr] 177 | fn _huffman_decode_step(cur_value: bool, node: &TraversableNode) -> &TreeNode {
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.16s
[INFO] running `"docker" "inspect" "0ade5245388ab57173e05a8a6126f4d6c6b80d4ce1ac1249fec509ed9a44d433"`
[INFO] running `"docker" "rm" "-f" "0ade5245388ab57173e05a8a6126f4d6c6b80d4ce1ac1249fec509ed9a44d433"`
[INFO] [stdout] 0ade5245388ab57173e05a8a6126f4d6c6b80d4ce1ac1249fec509ed9a44d433
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/PeterCxy/huffman-coding-cse104-rust:/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] 5c9547a0cad0fa5cbcb8d475a307f03201387bfb6d9eacf94e8ba4834149b812
[INFO] running `"docker" "start" "-a" "5c9547a0cad0fa5cbcb8d475a307f03201387bfb6d9eacf94e8ba4834149b812"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traversal.rs:50:47
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn visit_node<'b>(&'b mut self, node: &'a TraversableNode) -> Option<Result<(BitVec<u32>, u8), TreeTraverser<'a>>> {
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:177:49
[INFO] [stderr]     |
[INFO] [stderr] 177 | fn _huffman_decode_step(cur_value: bool, node: &TraversableNode) -> &TreeNode {
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "5c9547a0cad0fa5cbcb8d475a307f03201387bfb6d9eacf94e8ba4834149b812"`
[INFO] running `"docker" "rm" "-f" "5c9547a0cad0fa5cbcb8d475a307f03201387bfb6d9eacf94e8ba4834149b812"`
[INFO] [stdout] 5c9547a0cad0fa5cbcb8d475a307f03201387bfb6d9eacf94e8ba4834149b812
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/PeterCxy/huffman-coding-cse104-rust:/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] 9315f2423a25b606c96dd9ef2cb5f6f37ee6fe433cf6464d9d21028b11a4b02e
[INFO] running `"docker" "start" "-a" "9315f2423a25b606c96dd9ef2cb5f6f37ee6fe433cf6464d9d21028b11a4b02e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/huffman-d0706b1b687ad2e3
[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" "9315f2423a25b606c96dd9ef2cb5f6f37ee6fe433cf6464d9d21028b11a4b02e"`
[INFO] running `"docker" "rm" "-f" "9315f2423a25b606c96dd9ef2cb5f6f37ee6fe433cf6464d9d21028b11a4b02e"`
[INFO] [stdout] 9315f2423a25b606c96dd9ef2cb5f6f37ee6fe433cf6464d9d21028b11a4b02e