Dec 17 21:56:14.722 INFO checking julian-goldsmith/huffman-rust against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 21:56:14.722 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 21:56:15.130 INFO [stdout] 28da308deb474856aa18d60c593c462f6f8e7f64ad4d1f032c6e9fa5885c1faf
Dec 17 21:56:15.132 INFO running `"docker" "start" "-a" "28da308deb474856aa18d60c593c462f6f8e7f64ad4d1f032c6e9fa5885c1faf"`
Dec 17 21:56:16.678 INFO [stderr]     Checking huffman-rust v0.1.0 (/opt/crater/workdir)
Dec 17 21:56:16.996 INFO [stderr] warning: unused imports: `ReadBytesExt`, `WriteBytesExt`
Dec 17 21:56:16.996 INFO [stderr]  --> src/huffman/mod.rs:8:17
Dec 17 21:56:16.996 INFO [stderr]   |
Dec 17 21:56:16.996 INFO [stderr] 8 | use byteorder::{ReadBytesExt, WriteBytesExt};
Dec 17 21:56:16.996 INFO [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^^^^^
Dec 17 21:56:16.996 INFO [stderr]   |
Dec 17 21:56:16.996 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 21:56:16.996 INFO [stderr] 
Dec 17 21:56:16.996 INFO [stderr] warning: unused import: `std::iter`
Dec 17 21:56:16.996 INFO [stderr]  --> src/rle.rs:1:5
Dec 17 21:56:16.996 INFO [stderr]   |
Dec 17 21:56:16.996 INFO [stderr] 1 | use std::iter;
Dec 17 21:56:16.996 INFO [stderr]   |     ^^^^^^^^^
Dec 17 21:56:16.996 INFO [stderr] 
Dec 17 21:56:17.072 INFO [stderr] warning: unused imports: `ReadBytesExt`, `WriteBytesExt`
Dec 17 21:56:17.072 INFO [stderr]  --> src/huffman/mod.rs:8:17
Dec 17 21:56:17.072 INFO [stderr]   |
Dec 17 21:56:17.072 INFO [stderr] 8 | use byteorder::{ReadBytesExt, WriteBytesExt};
Dec 17 21:56:17.072 INFO [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^^^^^
Dec 17 21:56:17.072 INFO [stderr]   |
Dec 17 21:56:17.072 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 21:56:17.072 INFO [stderr] 
Dec 17 21:56:17.072 INFO [stderr] warning: unused import: `std::iter`
Dec 17 21:56:17.072 INFO [stderr]  --> src/rle.rs:1:5
Dec 17 21:56:17.072 INFO [stderr]   |
Dec 17 21:56:17.072 INFO [stderr] 1 | use std::iter;
Dec 17 21:56:17.072 INFO [stderr]   |     ^^^^^^^^^
Dec 17 21:56:17.072 INFO [stderr] 
Dec 17 21:56:17.412 INFO [stderr] warning: unused variable: `err`
Dec 17 21:56:17.412 INFO [stderr]    --> src/bitstream.rs:108:17
Dec 17 21:56:17.412 INFO [stderr]     |
Dec 17 21:56:17.412 INFO [stderr] 108 |             Err(err) => return Ok(None),        // FIXME: handle non-EOF
Dec 17 21:56:17.412 INFO [stderr]     |                 ^^^ help: consider using `_err` instead
Dec 17 21:56:17.412 INFO [stderr]     |
Dec 17 21:56:17.412 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 17 21:56:17.412 INFO [stderr] 
Dec 17 21:56:17.447 INFO [stderr] warning: variable does not need to be mutable
Dec 17 21:56:17.447 INFO [stderr]   --> src/huffman/mod.rs:25:27
Dec 17 21:56:17.447 INFO [stderr]    |
Dec 17 21:56:17.447 INFO [stderr] 25 |     fn write_freqs(&self, mut writer: &mut Write) -> io::Result<usize> {
Dec 17 21:56:17.447 INFO [stderr]    |                           ----^^^^^^
Dec 17 21:56:17.447 INFO [stderr]    |                           |
Dec 17 21:56:17.447 INFO [stderr]    |                           help: remove this `mut`
Dec 17 21:56:17.447 INFO [stderr]    |
Dec 17 21:56:17.447 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 21:56:17.447 INFO [stderr] 
Dec 17 21:56:17.508 INFO [stderr] warning: unused variable: `err`
Dec 17 21:56:17.508 INFO [stderr]    --> src/bitstream.rs:108:17
Dec 17 21:56:17.508 INFO [stderr]     |
Dec 17 21:56:17.508 INFO [stderr] 108 |             Err(err) => return Ok(None),        // FIXME: handle non-EOF
Dec 17 21:56:17.508 INFO [stderr]     |                 ^^^ help: consider using `_err` instead
Dec 17 21:56:17.508 INFO [stderr]     |
Dec 17 21:56:17.508 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 17 21:56:17.508 INFO [stderr] 
Dec 17 21:56:17.542 INFO [stderr] warning: variable does not need to be mutable
Dec 17 21:56:17.542 INFO [stderr]   --> src/huffman/mod.rs:25:27
Dec 17 21:56:17.542 INFO [stderr]    |
Dec 17 21:56:17.542 INFO [stderr] 25 |     fn write_freqs(&self, mut writer: &mut Write) -> io::Result<usize> {
Dec 17 21:56:17.542 INFO [stderr]    |                           ----^^^^^^
Dec 17 21:56:17.542 INFO [stderr]    |                           |
Dec 17 21:56:17.542 INFO [stderr]    |                           help: remove this `mut`
Dec 17 21:56:17.568 INFO [stderr]    |
Dec 17 21:56:17.568 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 21:56:17.568 INFO [stderr] 
Dec 17 21:56:17.660 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
Dec 17 21:56:18.168 INFO running `"docker" "inspect" "28da308deb474856aa18d60c593c462f6f8e7f64ad4d1f032c6e9fa5885c1faf"`
Dec 17 21:56:18.534 INFO running `"docker" "rm" "-f" "28da308deb474856aa18d60c593c462f6f8e7f64ad4d1f032c6e9fa5885c1faf"`
Dec 17 21:56:18.935 INFO [stdout] 28da308deb474856aa18d60c593c462f6f8e7f64ad4d1f032c6e9fa5885c1faf