[INFO] fetching crate smol-attributes 0.1.3...
[INFO] testing smol-attributes-0.1.3 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate smol-attributes 0.1.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate smol-attributes 0.1.3 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate smol-attributes 0.1.3
[INFO] finished tweaking crates.io crate smol-attributes 0.1.3
[INFO] tweaked toml for crates.io crate smol-attributes 0.1.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate smol-attributes 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wepoll-binding v1.1.0
[INFO] [stderr]   Downloaded wepoll-sys v1.0.4
[INFO] [stderr]   Downloaded smol v0.1.0
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 980a1bfa39be7a785ebd785cccd22d2c3b4e6d1bdd5ec48bdfc67e2df4622d63
[INFO] running `"docker" "start" "-a" "980a1bfa39be7a785ebd785cccd22d2c3b4e6d1bdd5ec48bdfc67e2df4622d63"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling futures-io v0.3.4
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling once_cell v1.3.1
[INFO] [stderr]    Compiling scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling async-task v3.0.0
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling crossbeam-channel v0.4.2
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling piper v0.1.1
[INFO] [stderr]    Compiling smol v0.1.0
[INFO] [stderr]    Compiling smol-attributes v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.16s
[INFO] running `"docker" "inspect" "980a1bfa39be7a785ebd785cccd22d2c3b4e6d1bdd5ec48bdfc67e2df4622d63"`
[INFO] running `"docker" "rm" "-f" "980a1bfa39be7a785ebd785cccd22d2c3b4e6d1bdd5ec48bdfc67e2df4622d63"`
[INFO] [stdout] 980a1bfa39be7a785ebd785cccd22d2c3b4e6d1bdd5ec48bdfc67e2df4622d63
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 615cfa822635033d773e1db63326be41a500d18480cf5082af72ee056e49fe55
[INFO] running `"docker" "start" "-a" "615cfa822635033d773e1db63326be41a500d18480cf5082af72ee056e49fe55"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling smol-attributes v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `smol_potat`
[INFO] [stderr]  --> tests/test.rs:1:3
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[smol_potat::test]
[INFO] [stderr]   |   ^^^^^^^^^^ use of undeclared type or module `smol_potat`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `smol_potat`
[INFO] [stderr]  --> examples/main.rs:3:3
[INFO] [stderr]   |
[INFO] [stderr] 3 | #[smol_potat::main]
[INFO] [stderr]   |   ^^^^^^^^^^ use of undeclared type or module `smol_potat`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: could not compile `smol-attributes`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0277]: `main` has invalid return type `impl std::future::Future`
[INFO] [stderr]  --> examples/main.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | async fn main() {
[INFO] [stderr]   |                 ^ `main` can only return types that implement `std::process::Termination`
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider using `()`, or a `Result`
[INFO] [stderr] 
[INFO] [stderr] error[E0752]: `main` function is not allowed to be `async`
[INFO] [stderr]  --> examples/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | async fn main() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^ `main` function is not allowed to be `async`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0433, E0752.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "615cfa822635033d773e1db63326be41a500d18480cf5082af72ee056e49fe55"`
[INFO] running `"docker" "rm" "-f" "615cfa822635033d773e1db63326be41a500d18480cf5082af72ee056e49fe55"`
[INFO] [stdout] 615cfa822635033d773e1db63326be41a500d18480cf5082af72ee056e49fe55