[INFO] crate rio 0.7.1 is already in cache
[INFO] checking rio-0.7.1 against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] extracting crate rio 0.7.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rio 0.7.1 on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rio 0.7.1
[INFO] finished tweaking crates.io crate rio 0.7.1
[INFO] tweaked toml for crates.io crate rio 0.7.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate rio 0.7.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "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] a1d0988fc905fa945e515a5431b6ff82800c0e498e9173a4347d608286644076
[INFO] running `"docker" "start" "-a" "a1d0988fc905fa945e515a5431b6ff82800c0e498e9173a4347d608286644076"`
[INFO] [stderr]     Checking extreme v666.666.666
[INFO] [stderr]     Checking rio v0.7.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/async.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |             proxy(&ring, &stream, &stream).await;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `"docker" "inspect" "a1d0988fc905fa945e515a5431b6ff82800c0e498e9173a4347d608286644076"`
[INFO] running `"docker" "rm" "-f" "a1d0988fc905fa945e515a5431b6ff82800c0e498e9173a4347d608286644076"`
[INFO] [stdout] a1d0988fc905fa945e515a5431b6ff82800c0e498e9173a4347d608286644076