[INFO] crate huffman-rust 0.1.1 is already in cache
[INFO] extracting crate huffman-rust 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/huffman-rust/0.1.1
[INFO] extracting crate huffman-rust 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/huffman-rust/0.1.1
[INFO] validating manifest of huffman-rust-0.1.1 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 huffman-rust-0.1.1 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 huffman-rust-0.1.1
[INFO] finished frobbing huffman-rust-0.1.1
[INFO] frobbed toml for huffman-rust-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/huffman-rust/0.1.1/Cargo.toml
[INFO] started frobbing huffman-rust-0.1.1
[INFO] finished frobbing huffman-rust-0.1.1
[INFO] frobbed toml for huffman-rust-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/huffman-rust/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 huffman-rust-0.1.1 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/huffman-rust/0.1.1:/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] a97a90d46f661b12760d44e2c21098c01fb79bcd4118c3fbe8a35068ee35fc52
[INFO] running `"docker" "start" "-a" "a97a90d46f661b12760d44e2c21098c01fb79bcd4118c3fbe8a35068ee35fc52"`
[INFO] [stderr]    Compiling huffman-rust v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/canonical.rs:45:69
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn from_read<R: Read>(read: R) -> Result<CanonicalTree, Box<Error>> {
[INFO] [stderr]    |                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[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/canonical.rs:73:94
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn encode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/canonical.rs:87:94
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn decode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:19:87
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn buffered_encode<R: Read + Seek, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:23:80
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn buffered_decode<R: Read, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:27:86
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn encode<R: Read + Seek, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:55:79
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn decode<R: Read, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "a97a90d46f661b12760d44e2c21098c01fb79bcd4118c3fbe8a35068ee35fc52"`
[INFO] running `"docker" "rm" "-f" "a97a90d46f661b12760d44e2c21098c01fb79bcd4118c3fbe8a35068ee35fc52"`
[INFO] [stdout] a97a90d46f661b12760d44e2c21098c01fb79bcd4118c3fbe8a35068ee35fc52
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/huffman-rust/0.1.1:/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] 4404e2ff1b42c2c21a0b3e9d4bc1081b7217d23da52fe24548ce30656f68db11
[INFO] running `"docker" "start" "-a" "4404e2ff1b42c2c21a0b3e9d4bc1081b7217d23da52fe24548ce30656f68db11"`
[INFO] [stderr]    Compiling huffman-rust v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/canonical.rs:45:69
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn from_read<R: Read>(read: R) -> Result<CanonicalTree, Box<Error>> {
[INFO] [stderr]    |                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[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/canonical.rs:73:94
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn encode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/canonical.rs:87:94
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn decode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:19:87
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn buffered_encode<R: Read + Seek, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:23:80
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn buffered_decode<R: Read, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:27:86
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn encode<R: Read + Seek, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:55:79
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn decode<R: Read, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `"docker" "inspect" "4404e2ff1b42c2c21a0b3e9d4bc1081b7217d23da52fe24548ce30656f68db11"`
[INFO] running `"docker" "rm" "-f" "4404e2ff1b42c2c21a0b3e9d4bc1081b7217d23da52fe24548ce30656f68db11"`
[INFO] [stdout] 4404e2ff1b42c2c21a0b3e9d4bc1081b7217d23da52fe24548ce30656f68db11
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/huffman-rust/0.1.1:/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] d369c62416a5dc99d92c635e22dfe848374067c0a4b5a01f24b2c7846df0205e
[INFO] running `"docker" "start" "-a" "d369c62416a5dc99d92c635e22dfe848374067c0a4b5a01f24b2c7846df0205e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/huffman_rust-9e3de478be3e49d8
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test bitstream::tests::test_reader ... ok
[INFO] [stdout] test bitstream::tests::test_writer ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test bitstream::tests::test_writer_partial ... ok
[INFO] [stdout] test canonical::tests::test_small_sample_string ... ok
[INFO] [stdout] test bitstream::tests::test_empty_reader ... ok
[INFO] [stdout] test bitstream::tests::test_drop_no_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests huffman-rust
[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" "d369c62416a5dc99d92c635e22dfe848374067c0a4b5a01f24b2c7846df0205e"`
[INFO] running `"docker" "rm" "-f" "d369c62416a5dc99d92c635e22dfe848374067c0a4b5a01f24b2c7846df0205e"`
[INFO] [stdout] d369c62416a5dc99d92c635e22dfe848374067c0a4b5a01f24b2c7846df0205e