[INFO] fetching crate koper 0.3.0...
[INFO] testing koper-0.3.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate koper 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate koper 0.3.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate koper 0.3.0
[INFO] finished tweaking crates.io crate koper 0.3.0
[INFO] tweaked toml for crates.io crate koper 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "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=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" "+1.44.0" "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] 7ae0b7a3f73fc748f9edbf126fc6bb2b0f9b4c7ec5b7bc366a887407ba5a8eeb
[INFO] running `"docker" "start" "-a" "7ae0b7a3f73fc748f9edbf126fc6bb2b0f9b4c7ec5b7bc366a887407ba5a8eeb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling koper v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `poll_fn_async`
[INFO] [stderr]   --> src/future/poll_fn.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub async fn poll_fn_async<F, T>(f: F) -> T
[INFO] [stderr]    |              ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "7ae0b7a3f73fc748f9edbf126fc6bb2b0f9b4c7ec5b7bc366a887407ba5a8eeb"`
[INFO] running `"docker" "rm" "-f" "7ae0b7a3f73fc748f9edbf126fc6bb2b0f9b4c7ec5b7bc366a887407ba5a8eeb"`
[INFO] [stdout] 7ae0b7a3f73fc748f9edbf126fc6bb2b0f9b4c7ec5b7bc366a887407ba5a8eeb
[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=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" "+1.44.0" "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] 64c328d8164058b0a7ed8b699069991fe81101428bfb984173acce10933c283f
[INFO] running `"docker" "start" "-a" "64c328d8164058b0a7ed8b699069991fe81101428bfb984173acce10933c283f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling koper v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `poll_fn_async`
[INFO] [stderr]   --> src/future/poll_fn.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub async fn poll_fn_async<F, T>(f: F) -> T
[INFO] [stderr]    |              ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `poll_fn_async`
[INFO] [stderr]   --> src/future/poll_fn.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub async fn poll_fn_async<F, T>(f: F) -> T
[INFO] [stderr]    |              ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "64c328d8164058b0a7ed8b699069991fe81101428bfb984173acce10933c283f"`
[INFO] running `"docker" "rm" "-f" "64c328d8164058b0a7ed8b699069991fe81101428bfb984173acce10933c283f"`
[INFO] [stdout] 64c328d8164058b0a7ed8b699069991fe81101428bfb984173acce10933c283f
[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=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" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b2bb5560f9e883646d3ee7aa327e5044d533254c4e216f65d062073caf941d22
[INFO] running `"docker" "start" "-a" "b2bb5560f9e883646d3ee7aa327e5044d533254c4e216f65d062073caf941d22"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: function is never used: `poll_fn_async`
[INFO] [stderr]   --> src/future/poll_fn.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub async fn poll_fn_async<F, T>(f: F) -> T
[INFO] [stderr]    |              ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `poll_fn_async`
[INFO] [stderr]   --> src/future/poll_fn.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub async fn poll_fn_async<F, T>(f: F) -> T
[INFO] [stderr]    |              ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/koper-54f29a8ec888ee9e
[INFO] [stderr]    Doc-tests koper
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b2bb5560f9e883646d3ee7aa327e5044d533254c4e216f65d062073caf941d22"`
[INFO] running `"docker" "rm" "-f" "b2bb5560f9e883646d3ee7aa327e5044d533254c4e216f65d062073caf941d22"`
[INFO] [stdout] b2bb5560f9e883646d3ee7aa327e5044d533254c4e216f65d062073caf941d22