[INFO] fetching crate byte-slice 0.1.12...
[INFO] checking byte-slice-0.1.12 against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] extracting crate byte-slice 0.1.12 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate byte-slice 0.1.12 on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate byte-slice 0.1.12
[INFO] finished tweaking crates.io crate byte-slice 0.1.12
[INFO] tweaked toml for crates.io crate byte-slice 0.1.12 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cc93f40762a79b901ef52206dd17a4cf5dd979dddc2497770eb4fce6eb819b0d
[INFO] running `Command { std: "docker" "start" "-a" "cc93f40762a79b901ef52206dd17a4cf5dd979dddc2497770eb4fce6eb819b0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc93f40762a79b901ef52206dd17a4cf5dd979dddc2497770eb4fce6eb819b0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc93f40762a79b901ef52206dd17a4cf5dd979dddc2497770eb4fce6eb819b0d", kill_on_drop: false }`
[INFO] [stdout] cc93f40762a79b901ef52206dd17a4cf5dd979dddc2497770eb4fce6eb819b0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dba071a593be2685a86e55cdbdab50c78d40073514f355eb283a4e6adcf6d6ca
[INFO] running `Command { std: "docker" "start" "-a" "dba071a593be2685a86e55cdbdab50c78d40073514f355eb283a4e6adcf6d6ca", kill_on_drop: false }`
[INFO] [stderr]     Checking byte-slice v0.1.12 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `v` is never read
[INFO] [stdout]   --> src/test.rs:83:28
[INFO] [stdout]    |
[INFO] [stdout] 83 |     bs_collect_digits8!(c, v, break,
[INFO] [stdout]    |                            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `v` is never read
[INFO] [stdout]    --> src/test.rs:140:29
[INFO] [stdout]     |
[INFO] [stdout] 140 |     bs_collect_digits16!(c, v, break,
[INFO] [stdout]     |                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `v` is never read
[INFO] [stdout]    --> src/test.rs:197:29
[INFO] [stdout]     |
[INFO] [stdout] 197 |     bs_collect_digits32!(c, v, break,
[INFO] [stdout]     |                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `v` is never read
[INFO] [stdout]    --> src/test.rs:254:29
[INFO] [stdout]     |
[INFO] [stdout] 254 |     bs_collect_digits64!(c, v, break,
[INFO] [stdout]     |                             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "dba071a593be2685a86e55cdbdab50c78d40073514f355eb283a4e6adcf6d6ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dba071a593be2685a86e55cdbdab50c78d40073514f355eb283a4e6adcf6d6ca", kill_on_drop: false }`
[INFO] [stdout] dba071a593be2685a86e55cdbdab50c78d40073514f355eb283a4e6adcf6d6ca