[INFO] fetching crate sonic_spin 0.1.0...
[INFO] checking sonic_spin-0.1.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate sonic_spin 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate sonic_spin 0.1.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate sonic_spin 0.1.0
[INFO] finished tweaking crates.io crate sonic_spin 0.1.0
[INFO] tweaked toml for crates.io crate sonic_spin 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a90b6d6636aa3bb4d6c717a2b20f0ce58ce5fdb8570e48ad70b4721ab094bdb6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "a90b6d6636aa3bb4d6c717a2b20f0ce58ce5fdb8570e48ad70b4721ab094bdb6"`
[INFO] [stderr]    Compiling syn-pub-items v0.15.30
[INFO] [stderr]     Checking sonic_spin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variant is never constructed: `Const`
[INFO] [stderr]    --> src/resyn/expr.rs:678:9
[INFO] [stderr]     |
[INFO] [stderr] 678 |         Const(Expr),
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Const`
[INFO] [stderr]    --> src/resyn/expr.rs:678:9
[INFO] [stderr]     |
[INFO] [stderr] 678 |         Const(Expr),
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Const`
[INFO] [stderr]    --> src/resyn/expr.rs:678:9
[INFO] [stderr]     |
[INFO] [stderr] 678 |         Const(Expr),
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `impl_trait_in_bindings` is incomplete and may cause the compiler to crash
[INFO] [stderr]  --> tests/async.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(impl_trait_in_bindings)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `async_await` has been stable since 1.39.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> tests/async.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(async_await)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `futures_api` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> tests/async.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(futures_api)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.59s
[INFO] running `"docker" "inspect" "a90b6d6636aa3bb4d6c717a2b20f0ce58ce5fdb8570e48ad70b4721ab094bdb6"`
[INFO] running `"docker" "rm" "-f" "a90b6d6636aa3bb4d6c717a2b20f0ce58ce5fdb8570e48ad70b4721ab094bdb6"`
[INFO] [stdout] a90b6d6636aa3bb4d6c717a2b20f0ce58ce5fdb8570e48ad70b4721ab094bdb6