[INFO] fetching crate target 1.0.0...
[INFO] checking target-1.0.0 against try#99a443d6903f71d521237d8acb5a3016b534d17b for pr-83354
[INFO] extracting crate target 1.0.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate target 1.0.0 on toolchain 99a443d6903f71d521237d8acb5a3016b534d17b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate target 1.0.0
[INFO] finished tweaking crates.io crate target 1.0.0
[INFO] tweaked toml for crates.io crate target 1.0.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd03a3403909736827a168f85bdb45eb75c59f7a05863ca744c0a29a76cfd86e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dd03a3403909736827a168f85bdb45eb75c59f7a05863ca744c0a29a76cfd86e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd03a3403909736827a168f85bdb45eb75c59f7a05863ca744c0a29a76cfd86e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd03a3403909736827a168f85bdb45eb75c59f7a05863ca744c0a29a76cfd86e", kill_on_drop: false }`
[INFO] [stdout] dd03a3403909736827a168f85bdb45eb75c59f7a05863ca744c0a29a76cfd86e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec9fcc5b36123f7ec2b9813a3e203305f4727f0d06e8f3e3f38d59e58f1708fc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ec9fcc5b36123f7ec2b9813a3e203305f4727f0d06e8f3e3f38d59e58f1708fc", kill_on_drop: false }`
[INFO] [stderr]     Checking target v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:14:37
[INFO] [stdout]    |
[INFO] [stdout] 14 |   #[cfg(target_arch = "x86_64"   )] { "x86_64"    }
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:26:36
[INFO] [stdout]    |
[INFO] [stdout] 26 |   #[cfg(target_os = "linux"     )] { "linux"      }
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:35:19
[INFO] [stdout]    |
[INFO] [stdout] 35 |   #[cfg(unix   )] { "unix"    }
[INFO] [stdout]    |                   ^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:40:31
[INFO] [stdout]    |
[INFO] [stdout] 40 |   #[cfg(target_env = "gnu" )] { "gnu"  }
[INFO] [stdout]    |                               ^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:48:36
[INFO] [stdout]    |
[INFO] [stdout] 48 |   #[cfg(target_endian = "little")] { "little" }
[INFO] [stdout]    |                                    ^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:53:39
[INFO] [stdout]    |
[INFO] [stdout] 53 |   #[cfg(target_pointer_width = "64")] { "64" }
[INFO] [stdout]    |                                       ^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |   #[cfg(not(test))] { false }
[INFO] [stdout]    |                     ^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:14:37
[INFO] [stdout]    |
[INFO] [stdout] 14 |   #[cfg(target_arch = "x86_64"   )] { "x86_64"    }
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:26:36
[INFO] [stdout]    |
[INFO] [stdout] 26 |   #[cfg(target_os = "linux"     )] { "linux"      }
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:35:19
[INFO] [stdout]    |
[INFO] [stdout] 35 |   #[cfg(unix   )] { "unix"    }
[INFO] [stdout]    |                   ^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:40:31
[INFO] [stdout]    |
[INFO] [stdout] 40 |   #[cfg(target_env = "gnu" )] { "gnu"  }
[INFO] [stdout]    |                               ^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:48:36
[INFO] [stdout]    |
[INFO] [stdout] 48 |   #[cfg(target_endian = "little")] { "little" }
[INFO] [stdout]    |                                    ^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:53:39
[INFO] [stdout]    |
[INFO] [stdout] 53 |   #[cfg(target_pointer_width = "64")] { "64" }
[INFO] [stdout]    |                                       ^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/lib.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |   #[cfg(test     )] { true  }
[INFO] [stdout]    |                     ^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "ec9fcc5b36123f7ec2b9813a3e203305f4727f0d06e8f3e3f38d59e58f1708fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec9fcc5b36123f7ec2b9813a3e203305f4727f0d06e8f3e3f38d59e58f1708fc", kill_on_drop: false }`
[INFO] [stdout] ec9fcc5b36123f7ec2b9813a3e203305f4727f0d06e8f3e3f38d59e58f1708fc