[INFO] fetching crate twang 0.2.0...
[INFO] checking twang-0.2.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate twang 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate twang 0.2.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate twang 0.2.0
[INFO] finished tweaking crates.io crate twang 0.2.0
[INFO] tweaked toml for crates.io crate twang 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded adi_speaker v0.0.1
[INFO] [stderr]   Downloaded adi v0.12.0
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 199cc66a3908d38a93d275e6f9b0fec704fc7748ce67586ac7d5c66127e6f796
[INFO] running `"docker" "start" "-a" "199cc66a3908d38a93d275e6f9b0fec704fc7748ce67586ac7d5c66127e6f796"`
[INFO] [stderr]     Checking nix v0.9.0
[INFO] [stderr]     Checking twang v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `core::num::<impl u8>::wrapping_add` that must be used
[INFO] [stderr]    --> src/pink.rs:278:5
[INFO] [stderr]     |
[INFO] [stderr] 278 |                 self.pncnt.wrapping_add(1);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Checking adi_speaker v0.0.1
[INFO] [stderr]     Checking adi v0.12.0
[INFO] [stderr] warning: unused return value of `core::num::<impl u8>::wrapping_add` that must be used
[INFO] [stderr]    --> src/pink.rs:278:5
[INFO] [stderr]     |
[INFO] [stderr] 278 |                 self.pncnt.wrapping_add(1);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.50s
[INFO] running `"docker" "inspect" "199cc66a3908d38a93d275e6f9b0fec704fc7748ce67586ac7d5c66127e6f796"`
[INFO] running `"docker" "rm" "-f" "199cc66a3908d38a93d275e6f9b0fec704fc7748ce67586ac7d5c66127e6f796"`
[INFO] [stdout] 199cc66a3908d38a93d275e6f9b0fec704fc7748ce67586ac7d5c66127e6f796