Dec 19 14:48:14.045 INFO checking julian-goldsmith/huffman-rust against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:48:14.045 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/julian-goldsmith/huffman-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=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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 14:48:14.418 INFO [stdout] 21f535a5ec448285a3880b0a9f7f9880c7f2b464cacda1bd54d51cedb9cff6e0
Dec 19 14:48:14.426 INFO running `"docker" "start" "-a" "21f535a5ec448285a3880b0a9f7f9880c7f2b464cacda1bd54d51cedb9cff6e0"`
Dec 19 14:48:15.969 INFO [stderr]     Checking huffman-rust v0.1.0 (/opt/crater/workdir)
Dec 19 14:48:16.208 INFO [stderr] warning: unused imports: `ReadBytesExt`, `WriteBytesExt`
Dec 19 14:48:16.208 INFO [stderr]  --> src/huffman/mod.rs:8:17
Dec 19 14:48:16.208 INFO [stderr]   |
Dec 19 14:48:16.208 INFO [stderr] 8 | use byteorder::{ReadBytesExt, WriteBytesExt};
Dec 19 14:48:16.208 INFO [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^^^^^
Dec 19 14:48:16.208 INFO [stderr]   |
Dec 19 14:48:16.208 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 14:48:16.208 INFO [stderr] 
Dec 19 14:48:16.208 INFO [stderr] warning: unused import: `std::iter`
Dec 19 14:48:16.208 INFO [stderr]  --> src/rle.rs:1:5
Dec 19 14:48:16.208 INFO [stderr]   |
Dec 19 14:48:16.208 INFO [stderr] 1 | use std::iter;
Dec 19 14:48:16.208 INFO [stderr]   |     ^^^^^^^^^
Dec 19 14:48:16.208 INFO [stderr] 
Dec 19 14:48:16.264 INFO [stderr] warning: unused imports: `ReadBytesExt`, `WriteBytesExt`
Dec 19 14:48:16.264 INFO [stderr]  --> src/huffman/mod.rs:8:17
Dec 19 14:48:16.264 INFO [stderr]   |
Dec 19 14:48:16.264 INFO [stderr] 8 | use byteorder::{ReadBytesExt, WriteBytesExt};
Dec 19 14:48:16.264 INFO [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^^^^^
Dec 19 14:48:16.264 INFO [stderr]   |
Dec 19 14:48:16.264 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 14:48:16.264 INFO [stderr] 
Dec 19 14:48:16.264 INFO [stderr] warning: unused import: `std::iter`
Dec 19 14:48:16.264 INFO [stderr]  --> src/rle.rs:1:5
Dec 19 14:48:16.264 INFO [stderr]   |
Dec 19 14:48:16.264 INFO [stderr] 1 | use std::iter;
Dec 19 14:48:16.264 INFO [stderr]   |     ^^^^^^^^^
Dec 19 14:48:16.264 INFO [stderr] 
Dec 19 14:48:16.508 INFO [stderr] warning: unused variable: `err`
Dec 19 14:48:16.508 INFO [stderr]    --> src/bitstream.rs:108:17
Dec 19 14:48:16.508 INFO [stderr]     |
Dec 19 14:48:16.508 INFO [stderr] 108 |             Err(err) => return Ok(None),        // FIXME: handle non-EOF
Dec 19 14:48:16.508 INFO [stderr]     |                 ^^^ help: consider using `_err` instead
Dec 19 14:48:16.508 INFO [stderr]     |
Dec 19 14:48:16.508 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 14:48:16.508 INFO [stderr] 
Dec 19 14:48:16.508 INFO [stderr] warning: unused variable: `err`
Dec 19 14:48:16.508 INFO [stderr]    --> src/bitstream.rs:108:17
Dec 19 14:48:16.508 INFO [stderr]     |
Dec 19 14:48:16.508 INFO [stderr] 108 |             Err(err) => return Ok(None),        // FIXME: handle non-EOF
Dec 19 14:48:16.556 INFO [stderr]     |                 ^^^ help: consider using `_err` instead
Dec 19 14:48:16.556 INFO [stderr]     |
Dec 19 14:48:16.556 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 14:48:16.556 INFO [stderr] 
Dec 19 14:48:16.556 INFO [stderr] warning: variable does not need to be mutable
Dec 19 14:48:16.556 INFO [stderr]   --> src/huffman/mod.rs:25:27
Dec 19 14:48:16.556 INFO [stderr]    |
Dec 19 14:48:16.556 INFO [stderr] 25 |     fn write_freqs(&self, mut writer: &mut Write) -> io::Result<usize> {
Dec 19 14:48:16.556 INFO [stderr]    |                           ----^^^^^^
Dec 19 14:48:16.557 INFO [stderr]    |                           |
Dec 19 14:48:16.557 INFO [stderr]    |                           help: remove this `mut`
Dec 19 14:48:16.557 INFO [stderr]    |
Dec 19 14:48:16.557 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 14:48:16.557 INFO [stderr] 
Dec 19 14:48:16.609 INFO [stderr] warning: variable does not need to be mutable
Dec 19 14:48:16.609 INFO [stderr]   --> src/huffman/mod.rs:25:27
Dec 19 14:48:16.609 INFO [stderr]    |
Dec 19 14:48:16.609 INFO [stderr] 25 |     fn write_freqs(&self, mut writer: &mut Write) -> io::Result<usize> {
Dec 19 14:48:16.609 INFO [stderr]    |                           ----^^^^^^
Dec 19 14:48:16.609 INFO [stderr]    |                           |
Dec 19 14:48:16.609 INFO [stderr]    |                           help: remove this `mut`
Dec 19 14:48:16.609 INFO [stderr]    |
Dec 19 14:48:16.609 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 14:48:16.609 INFO [stderr] 
Dec 19 14:48:16.696 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Dec 19 14:48:17.828 INFO running `"docker" "inspect" "21f535a5ec448285a3880b0a9f7f9880c7f2b464cacda1bd54d51cedb9cff6e0"`
Dec 19 14:48:18.270 INFO running `"docker" "rm" "-f" "21f535a5ec448285a3880b0a9f7f9880c7f2b464cacda1bd54d51cedb9cff6e0"`
Dec 19 14:48:18.677 INFO [stdout] 21f535a5ec448285a3880b0a9f7f9880c7f2b464cacda1bd54d51cedb9cff6e0