[INFO] updating cached repository datrs/bitfield-rle
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/datrs/bitfield-rle
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/datrs/bitfield-rle" "work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/datrs/bitfield-rle"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/datrs/bitfield-rle'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/datrs/bitfield-rle" "work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/datrs/bitfield-rle"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/datrs/bitfield-rle'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0cebadb531a36a5d2259457dde6272eab797878f
[INFO] sha for GitHub repo datrs/bitfield-rle: 0cebadb531a36a5d2259457dde6272eab797878f
[INFO] validating manifest of datrs/bitfield-rle on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of datrs/bitfield-rle on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing datrs/bitfield-rle
[INFO] finished frobbing datrs/bitfield-rle
[INFO] frobbed toml for datrs/bitfield-rle written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/datrs/bitfield-rle/Cargo.toml
[INFO] started frobbing datrs/bitfield-rle
[INFO] finished frobbing datrs/bitfield-rle
[INFO] frobbed toml for datrs/bitfield-rle written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/datrs/bitfield-rle/Cargo.toml
[INFO] crate datrs/bitfield-rle has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking datrs/bitfield-rle against master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039 for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-3/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/datrs/bitfield-rle:/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" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1b9c390d1433200b2a5ca8735e7e308f4f9b1f4350562ac94d635e0846a8bcd5
[INFO] running `"docker" "start" "-a" "1b9c390d1433200b2a5ca8735e7e308f4f9b1f4350562ac94d635e0846a8bcd5"`
[INFO] [stderr]     Checking varinteger v1.0.6
[INFO] [stderr]    Compiling syn v0.15.13
[INFO] [stderr]    Compiling synstructure v0.10.0
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking memory-pager v0.8.0
[INFO] [stderr]     Checking bitfield-rle v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking sparse-bitfield v0.8.1
[INFO] [stderr] warning: unused variable: `reader`
[INFO] [stderr]   --> src/lib.rs:35:3
[INFO] [stderr]    |
[INFO] [stderr] 35 |   reader: impl AsRef<Vec<u8>>,
[INFO] [stderr]    |   ^^^^^^ help: consider using `_reader` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `offset`
[INFO] [stderr]   --> src/lib.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |   offset: usize,
[INFO] [stderr]    |   ^^^^^^ help: consider using `_offset` instead
[INFO] [stderr] 
[INFO] [stderr] error: unused variable: `reader`
[INFO] [stderr]   --> src/lib.rs:35:3
[INFO] [stderr]    |
[INFO] [stderr] 35 |   reader: impl AsRef<Vec<u8>>,
[INFO] [stderr]    |   ^^^^^^ help: consider using `_reader` instead
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:4:24
[INFO] [stderr]    |
[INFO] [stderr] 4  | #![cfg_attr(test, deny(warnings))]
[INFO] [stderr]    |                        ^^^^^^^^
[INFO] [stderr]    = note: #[deny(unused_variables)] implied by #[deny(warnings)]
[INFO] [stderr] 
[INFO] [stderr] error: unused variable: `offset`
[INFO] [stderr]   --> src/lib.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |   offset: usize,
[INFO] [stderr]    |   ^^^^^^ help: consider using `_offset` instead
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `bitfield-rle`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1b9c390d1433200b2a5ca8735e7e308f4f9b1f4350562ac94d635e0846a8bcd5"`
[INFO] running `"docker" "rm" "-f" "1b9c390d1433200b2a5ca8735e7e308f4f9b1f4350562ac94d635e0846a8bcd5"`
[INFO] [stdout] 1b9c390d1433200b2a5ca8735e7e308f4f9b1f4350562ac94d635e0846a8bcd5