[INFO] crate rc2 0.2.0 is already in cache
[INFO] extracting crate rc2 0.2.0 into work/ex/clippy-test-run/sources/stable/reg/rc2/0.2.0
[INFO] extracting crate rc2 0.2.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rc2/0.2.0
[INFO] validating manifest of rc2-0.2.0 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rc2-0.2.0 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rc2-0.2.0
[INFO] finished frobbing rc2-0.2.0
[INFO] frobbed toml for rc2-0.2.0 written to work/ex/clippy-test-run/sources/stable/reg/rc2/0.2.0/Cargo.toml
[INFO] started frobbing rc2-0.2.0
[INFO] finished frobbing rc2-0.2.0
[INFO] frobbed toml for rc2-0.2.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rc2/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting rc2-0.2.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/rc2/0.2.0:/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=forbid" "-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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 224497e6240526c6b5862bd568553faf3fd481754c7499de701ac6cf1839e24a
[INFO] running `"docker" "start" "-a" "224497e6240526c6b5862bd568553faf3fd481754c7499de701ac6cf1839e24a"`
[INFO] [stderr]     Checking rc2 v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:43:29
[INFO] [stderr]    |
[INFO] [stderr] 43 |             let pos: u32 = (key_buffer[i-1] as u32 + key_buffer[i-key_len] as u32) & 0xff;
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `u32::from(key_buffer[i-1])`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:43:54
[INFO] [stderr]    |
[INFO] [stderr] 43 |             let pos: u32 = (key_buffer[i-1] as u32 + key_buffer[i-key_len] as u32) & 0xff;
[INFO] [stderr]    |                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u32::from(key_buffer[i-key_len])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:56:26
[INFO] [stderr]    |
[INFO] [stderr] 56 |             result[i] = ((key_buffer[2*i+1] as u16) << 8) + (key_buffer[2*i] as u16)
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u16::from(key_buffer[2*i+1])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:56:61
[INFO] [stderr]    |
[INFO] [stderr] 56 |             result[i] = ((key_buffer[2*i+1] as u16) << 8) + (key_buffer[2*i] as u16)
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u16::from(key_buffer[2*i])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:113:14
[INFO] [stderr]     |
[INFO] [stderr] 113 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[1])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:113:40
[INFO] [stderr]     |
[INFO] [stderr] 113 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[0])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:114:14
[INFO] [stderr]     |
[INFO] [stderr] 114 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[3])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:114:40
[INFO] [stderr]     |
[INFO] [stderr] 114 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[2])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:115:14
[INFO] [stderr]     |
[INFO] [stderr] 115 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[5])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:115:40
[INFO] [stderr]     |
[INFO] [stderr] 115 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[4])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:116:14
[INFO] [stderr]     |
[INFO] [stderr] 116 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[7])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:116:40
[INFO] [stderr]     |
[INFO] [stderr] 116 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[6])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:140:14
[INFO] [stderr]     |
[INFO] [stderr] 140 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[1])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:140:40
[INFO] [stderr]     |
[INFO] [stderr] 140 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[0])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:141:14
[INFO] [stderr]     |
[INFO] [stderr] 141 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[3])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:141:40
[INFO] [stderr]     |
[INFO] [stderr] 141 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[2])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:142:14
[INFO] [stderr]     |
[INFO] [stderr] 142 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[5])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:142:40
[INFO] [stderr]     |
[INFO] [stderr] 142 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[4])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:143:14
[INFO] [stderr]     |
[INFO] [stderr] 143 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[7])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:143:40
[INFO] [stderr]     |
[INFO] [stderr] 143 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[6])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to one
[INFO] [stderr]    --> src/lib.rs:176:12
[INFO] [stderr]     |
[INFO] [stderr] 176 |         if key.len() < 1 || key.len() > 128 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `key.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:43:29
[INFO] [stderr]    |
[INFO] [stderr] 43 |             let pos: u32 = (key_buffer[i-1] as u32 + key_buffer[i-key_len] as u32) & 0xff;
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `u32::from(key_buffer[i-1])`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:43:54
[INFO] [stderr]    |
[INFO] [stderr] 43 |             let pos: u32 = (key_buffer[i-1] as u32 + key_buffer[i-key_len] as u32) & 0xff;
[INFO] [stderr]    |                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u32::from(key_buffer[i-key_len])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:56:26
[INFO] [stderr]    |
[INFO] [stderr] 56 |             result[i] = ((key_buffer[2*i+1] as u16) << 8) + (key_buffer[2*i] as u16)
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u16::from(key_buffer[2*i+1])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:56:61
[INFO] [stderr]    |
[INFO] [stderr] 56 |             result[i] = ((key_buffer[2*i+1] as u16) << 8) + (key_buffer[2*i] as u16)
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u16::from(key_buffer[2*i])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:113:14
[INFO] [stderr]     |
[INFO] [stderr] 113 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[1])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:113:40
[INFO] [stderr]     |
[INFO] [stderr] 113 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[0])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:114:14
[INFO] [stderr]     |
[INFO] [stderr] 114 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[3])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:114:40
[INFO] [stderr]     |
[INFO] [stderr] 114 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[2])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:115:14
[INFO] [stderr]     |
[INFO] [stderr] 115 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[5])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:115:40
[INFO] [stderr]     |
[INFO] [stderr] 115 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[4])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:116:14
[INFO] [stderr]     |
[INFO] [stderr] 116 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[7])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:116:40
[INFO] [stderr]     |
[INFO] [stderr] 116 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[6])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:140:14
[INFO] [stderr]     |
[INFO] [stderr] 140 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[1])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:140:40
[INFO] [stderr]     |
[INFO] [stderr] 140 |             ((block[1] as u16) << 8) + (block[0] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[0])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:141:14
[INFO] [stderr]     |
[INFO] [stderr] 141 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[3])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:141:40
[INFO] [stderr]     |
[INFO] [stderr] 141 |             ((block[3] as u16) << 8) + (block[2] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[2])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:142:14
[INFO] [stderr]     |
[INFO] [stderr] 142 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[5])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:142:40
[INFO] [stderr]     |
[INFO] [stderr] 142 |             ((block[5] as u16) << 8) + (block[4] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[4])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:143:14
[INFO] [stderr]     |
[INFO] [stderr] 143 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[7])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:143:40
[INFO] [stderr]     |
[INFO] [stderr] 143 |             ((block[7] as u16) << 8) + (block[6] as u16),
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^ help: try: `u16::from(block[6])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to one
[INFO] [stderr]    --> src/lib.rs:176:12
[INFO] [stderr]     |
[INFO] [stderr] 176 |         if key.len() < 1 || key.len() > 128 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `key.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] error: cannot find macro `bench!` in this scope
[INFO] [stderr]  --> benches/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | bench!(rc2::Rc2, 16);
[INFO] [stderr]   | ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rc2`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "224497e6240526c6b5862bd568553faf3fd481754c7499de701ac6cf1839e24a"`
[INFO] running `"docker" "rm" "-f" "224497e6240526c6b5862bd568553faf3fd481754c7499de701ac6cf1839e24a"`
[INFO] [stdout] 224497e6240526c6b5862bd568553faf3fd481754c7499de701ac6cf1839e24a