[INFO] crate zlib-src-sys 0.1.2 is already in cache
[INFO] checking zlib-src-sys-0.1.2 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate zlib-src-sys 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate zlib-src-sys 0.1.2 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate zlib-src-sys 0.1.2
[INFO] finished tweaking crates.io crate zlib-src-sys 0.1.2
[INFO] tweaked toml for crates.io crate zlib-src-sys 0.1.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] 2908718b340cc633b258a7e35b33595bb0b6e5d3cf931f8398386c388e1c15f0
[INFO] running `"docker" "start" "-a" "2908718b340cc633b258a7e35b33595bb0b6e5d3cf931f8398386c388e1c15f0"`
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling zlib-src-sys v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> build.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fs::remove_dir_all(&build_dir).is_ok();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> build.rs:15:2
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fs::create_dir(&build_dir).is_ok();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> build.rs:36:2
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fs::remove_dir_all(&build_dir).is_ok();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> build.rs:37:2
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fs::create_dir(&build_dir).is_ok();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `"docker" "inspect" "2908718b340cc633b258a7e35b33595bb0b6e5d3cf931f8398386c388e1c15f0"`
[INFO] running `"docker" "rm" "-f" "2908718b340cc633b258a7e35b33595bb0b6e5d3cf931f8398386c388e1c15f0"`
[INFO] [stdout] 2908718b340cc633b258a7e35b33595bb0b6e5d3cf931f8398386c388e1c15f0