[INFO] fetching crate optional 0.5.0...
[INFO] checking optional-0.5.0 against try#71b81291baafb8a58836272757b28817fe1d8190 for pr-73102
[INFO] extracting crate optional 0.5.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate optional 0.5.0 on toolchain 71b81291baafb8a58836272757b28817fe1d8190
[INFO] running `"/workspace/cargo-home/bin/cargo" "+71b81291baafb8a58836272757b28817fe1d8190" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate optional 0.5.0
[INFO] finished tweaking crates.io crate optional 0.5.0
[INFO] tweaked toml for crates.io crate optional 0.5.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+71b81291baafb8a58836272757b28817fe1d8190" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+71b81291baafb8a58836272757b28817fe1d8190" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+71b81291baafb8a58836272757b28817fe1d8190" "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] 948f0d54cf936c9ba80e4f32bd4e9e8b194bca8b09d480249c38fd2eca5c4aaf
[INFO] running `"docker" "start" "-a" "948f0d54cf936c9ba80e4f32bd4e9e8b194bca8b09d480249c38fd2eca5c4aaf"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking optional v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: `#[inline]` is ignored on function prototypes
[INFO] [stderr]     --> src/lib.rs:1033:5
[INFO] [stderr]      |
[INFO] [stderr] 1033 |     #[inline]
[INFO] [stderr]      |     ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `#[inline]` is ignored on function prototypes
[INFO] [stderr]     --> src/lib.rs:1117:5
[INFO] [stderr]      |
[INFO] [stderr] 1117 |     #[inline]
[INFO] [stderr]      |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: `#[inline]` is ignored on function prototypes
[INFO] [stderr]     --> src/lib.rs:1033:5
[INFO] [stderr]      |
[INFO] [stderr] 1033 |     #[inline]
[INFO] [stderr]      |     ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `#[inline]` is ignored on function prototypes
[INFO] [stderr]     --> src/lib.rs:1117:5
[INFO] [stderr]      |
[INFO] [stderr] 1117 |     #[inline]
[INFO] [stderr]      |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.33s
[INFO] running `"docker" "inspect" "948f0d54cf936c9ba80e4f32bd4e9e8b194bca8b09d480249c38fd2eca5c4aaf"`
[INFO] running `"docker" "rm" "-f" "948f0d54cf936c9ba80e4f32bd4e9e8b194bca8b09d480249c38fd2eca5c4aaf"`
[INFO] [stdout] 948f0d54cf936c9ba80e4f32bd4e9e8b194bca8b09d480249c38fd2eca5c4aaf