[INFO] fetching crate sharded-slab 0.0.4...
[INFO] checking sharded-slab-0.0.4 against beta-2019-10-27 for pr-65897
[INFO] extracting crate sharded-slab 0.0.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate sharded-slab 0.0.4 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate sharded-slab 0.0.4
[INFO] finished tweaking crates.io crate sharded-slab 0.0.4
[INFO] tweaked toml for crates.io crate sharded-slab 0.0.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded loom v0.2.12
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=allow" "-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-2019-10-27" "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] b50d8fa1f5c10c3f445947f433cad055ad8f8bfb2a0c17b452735ccb9c7e28d0
[INFO] running `"docker" "start" "-a" "b50d8fa1f5c10c3f445947f433cad055ad8f8bfb2a0c17b452735ccb9c7e28d0"`
[INFO] [stderr]     Checking sharded-slab v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling generator v0.6.19
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking proptest v0.9.4
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking loom v0.2.12
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stderr] error[E0599]: no method named `take` found for type `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>` in the current scope
[INFO] [stderr]    --> benches/bench.rs:105:55
[INFO] [stderr]     |
[INFO] [stderr] 105 | ...                   slab.write().unwrap().take(i);
[INFO] [stderr]     |                                             ^^^^ method not found in `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `take` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `&mut slab::Slab<usize> : std::iter::Iterator`
[INFO] [stderr]             `&mut std::sync::RwLockWriteGuard<'_, slab::Slab<usize>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `take` found for type `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>` in the current scope
[INFO] [stderr]    --> benches/bench.rs:113:55
[INFO] [stderr]     |
[INFO] [stderr] 113 | ...                   slab.write().unwrap().take(i);
[INFO] [stderr]     |                                             ^^^^ method not found in `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `take` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `&mut slab::Slab<usize> : std::iter::Iterator`
[INFO] [stderr]             `&mut std::sync::RwLockWriteGuard<'_, slab::Slab<usize>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `take` found for type `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>` in the current scope
[INFO] [stderr]    --> benches/bench.rs:121:55
[INFO] [stderr]     |
[INFO] [stderr] 121 | ...                   slab.write().unwrap().take(i);
[INFO] [stderr]     |                                             ^^^^ method not found in `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `take` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `&mut slab::Slab<usize> : std::iter::Iterator`
[INFO] [stderr]             `&mut std::sync::RwLockWriteGuard<'_, slab::Slab<usize>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `take` found for type `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>` in the current scope
[INFO] [stderr]    --> benches/bench.rs:129:55
[INFO] [stderr]     |
[INFO] [stderr] 129 | ...                   slab.write().unwrap().take(i);
[INFO] [stderr]     |                                             ^^^^ method not found in `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `take` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `&mut slab::Slab<usize> : std::iter::Iterator`
[INFO] [stderr]             `&mut std::sync::RwLockWriteGuard<'_, slab::Slab<usize>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `take` found for type `slab::Slab<usize>` in the current scope
[INFO] [stderr]    --> benches/bench.rs:163:26
[INFO] [stderr]     |
[INFO] [stderr] 163 |                     slab.take(i);
[INFO] [stderr]     |                          ^^^^ method not found in `slab::Slab<usize>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `take` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `&mut slab::Slab<usize> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `take` found for type `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>` in the current scope
[INFO] [stderr]    --> benches/bench.rs:172:43
[INFO] [stderr]     |
[INFO] [stderr] 172 |                     slab.write().unwrap().take(i);
[INFO] [stderr]     |                                           ^^^^ method not found in `std::sync::RwLockWriteGuard<'_, slab::Slab<usize>>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `take` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `&mut slab::Slab<usize> : std::iter::Iterator`
[INFO] [stderr]             `&mut std::sync::RwLockWriteGuard<'_, slab::Slab<usize>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `sharded-slab`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b50d8fa1f5c10c3f445947f433cad055ad8f8bfb2a0c17b452735ccb9c7e28d0"`
[INFO] running `"docker" "rm" "-f" "b50d8fa1f5c10c3f445947f433cad055ad8f8bfb2a0c17b452735ccb9c7e28d0"`
[INFO] [stdout] b50d8fa1f5c10c3f445947f433cad055ad8f8bfb2a0c17b452735ccb9c7e28d0