[INFO] crate variable_size_byte_writer 0.1.5 is already in cache
[INFO] checking variable_size_byte_writer-0.1.5 against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] extracting crate variable_size_byte_writer 0.1.5 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate variable_size_byte_writer 0.1.5 on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate variable_size_byte_writer 0.1.5
[INFO] finished tweaking crates.io crate variable_size_byte_writer 0.1.5
[INFO] tweaked toml for crates.io crate variable_size_byte_writer 0.1.5 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2d932ddeecbc24e8aa17b046f6e3a00bd526e16b049582d33bcc834024aa57d2
[INFO] running `"docker" "start" "-a" "2d932ddeecbc24e8aa17b046f6e3a00bd526e16b049582d33bcc834024aa57d2"`
[INFO] [stderr]     Checking typenum_loops v0.2.0
[INFO] [stderr]     Checking variable_size_byte_writer v0.1.5 (/opt/rustwide/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 1.29s
[INFO] running `"docker" "inspect" "2d932ddeecbc24e8aa17b046f6e3a00bd526e16b049582d33bcc834024aa57d2"`
[INFO] running `"docker" "rm" "-f" "2d932ddeecbc24e8aa17b046f6e3a00bd526e16b049582d33bcc834024aa57d2"`
[INFO] [stdout] 2d932ddeecbc24e8aa17b046f6e3a00bd526e16b049582d33bcc834024aa57d2