[INFO] fetching crate ifft 0.5.0...
[INFO] checking ifft-0.5.0 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate ifft 0.5.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ifft 0.5.0 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ifft 0.5.0
[INFO] finished tweaking crates.io crate ifft 0.5.0
[INFO] tweaked toml for crates.io crate ifft 0.5.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] 46efca7108137b16b18e4d601b10c06c6736e818b3ba2b45ed095f5a027e8deb
[INFO] running `"docker" "start" "-a" "46efca7108137b16b18e4d601b10c06c6736e818b3ba2b45ed095f5a027e8deb"`
[INFO] [stderr]     Checking shellexpand v1.0.0
[INFO] [stderr]     Checking ifft v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]    --> src/main.rs:714:9
[INFO] [stderr]     |
[INFO] [stderr] 714 | /         ifft.then_exec(&Some(Path::new("/dummy").to_path_buf()))
[INFO] [stderr] 715 | |             .is_err();
[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 err, consider `.unwrap_err()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `"docker" "inspect" "46efca7108137b16b18e4d601b10c06c6736e818b3ba2b45ed095f5a027e8deb"`
[INFO] running `"docker" "rm" "-f" "46efca7108137b16b18e4d601b10c06c6736e818b3ba2b45ed095f5a027e8deb"`
[INFO] [stdout] 46efca7108137b16b18e4d601b10c06c6736e818b3ba2b45ed095f5a027e8deb