[INFO] crate variable_size_byte_writer 0.1.5 is already in cache
[INFO] extracting crate variable_size_byte_writer 0.1.5 into work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/variable_size_byte_writer/0.1.5
[INFO] extracting crate variable_size_byte_writer 0.1.5 into work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/reg/variable_size_byte_writer/0.1.5
[INFO] validating manifest of variable_size_byte_writer-0.1.5 on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of variable_size_byte_writer-0.1.5 on toolchain try#74092351c05ae61047b2be02024415546595e974
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing variable_size_byte_writer-0.1.5
[INFO] finished frobbing variable_size_byte_writer-0.1.5
[INFO] frobbed toml for variable_size_byte_writer-0.1.5 written to work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/variable_size_byte_writer/0.1.5/Cargo.toml
[INFO] started frobbing variable_size_byte_writer-0.1.5
[INFO] finished frobbing variable_size_byte_writer-0.1.5
[INFO] frobbed toml for variable_size_byte_writer-0.1.5 written to work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/reg/variable_size_byte_writer/0.1.5/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking variable_size_byte_writer-0.1.5 against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60174
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60174/worker-6/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/variable_size_byte_writer/0.1.5:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b5847877eb454994c2494f014f66ae62df944674224cf98f74df208f772bcee9
[INFO] running `"docker" "start" "-a" "b5847877eb454994c2494f014f66ae62df944674224cf98f74df208f772bcee9"`
[INFO] [stderr]     Checking typenum_loops v0.2.0
[INFO] [stderr]     Checking variable_size_byte_writer v0.1.5 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> benches/benches.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut target = std::io::Cursor::new(vec![]);
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> benches/benches.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut target = std::io::Cursor::new(vec![]);
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> benches/benches.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let mut target = std::io::Cursor::new(vec![]);
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.42s
[INFO] running `"docker" "inspect" "b5847877eb454994c2494f014f66ae62df944674224cf98f74df208f772bcee9"`
[INFO] running `"docker" "rm" "-f" "b5847877eb454994c2494f014f66ae62df944674224cf98f74df208f772bcee9"`
[INFO] [stdout] b5847877eb454994c2494f014f66ae62df944674224cf98f74df208f772bcee9