[INFO] fetching crate arraylib 0.3.0...
[INFO] checking arraylib-0.3.0 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate arraylib 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate arraylib 0.3.0 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arraylib 0.3.0
[INFO] finished tweaking crates.io crate arraylib 0.3.0
[INFO] tweaked toml for crates.io crate arraylib 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] bdb27be3cabb3019491b09ac97516d39aa9d215798570e6433a0ee1b5f6699d7
[INFO] running `Command { std: "docker" "start" "-a" "bdb27be3cabb3019491b09ac97516d39aa9d215798570e6433a0ee1b5f6699d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdb27be3cabb3019491b09ac97516d39aa9d215798570e6433a0ee1b5f6699d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdb27be3cabb3019491b09ac97516d39aa9d215798570e6433a0ee1b5f6699d7", kill_on_drop: false }`
[INFO] [stdout] bdb27be3cabb3019491b09ac97516d39aa9d215798570e6433a0ee1b5f6699d7
[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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f58c0ecdcbee896f2d712f6d1d6d3a60391f352dcc37c4a505d0b7db256732d
[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" "9f58c0ecdcbee896f2d712f6d1d6d3a60391f352dcc37c4a505d0b7db256732d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking arraylib v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/util/local_macros.rs:113:46
[INFO] [stdout]     |
[INFO] [stdout] 113 |     ($size:literal, $f:block, $b:block) => { $f };
[INFO] [stdout]     |                                              ^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/util/local_macros.rs:113:46
[INFO] [stdout]     |
[INFO] [stdout] 113 |     ($size:literal, $f:block, $b:block) => { $f };
[INFO] [stdout]     |                                              ^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/util/local_macros.rs:113:46
[INFO] [stdout]     |
[INFO] [stdout] 113 |     ($size:literal, $f:block, $b:block) => { $f };
[INFO] [stdout]     |                                              ^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/util/local_macros.rs:113:46
[INFO] [stdout]     |
[INFO] [stdout] 113 |     ($size:literal, $f:block, $b:block) => { $f };
[INFO] [stdout]     |                                              ^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.80s
[INFO] running `Command { std: "docker" "inspect" "9f58c0ecdcbee896f2d712f6d1d6d3a60391f352dcc37c4a505d0b7db256732d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f58c0ecdcbee896f2d712f6d1d6d3a60391f352dcc37c4a505d0b7db256732d", kill_on_drop: false }`
[INFO] [stdout] 9f58c0ecdcbee896f2d712f6d1d6d3a60391f352dcc37c4a505d0b7db256732d