[INFO] fetching crate ring_buffer 0.1.3...
[INFO] testing ring_buffer-0.1.3 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate ring_buffer 0.1.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate ring_buffer 0.1.3 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ring_buffer 0.1.3
[INFO] finished tweaking crates.io crate ring_buffer 0.1.3
[INFO] tweaked toml for crates.io crate ring_buffer 0.1.3 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 24c6e30e524b96230a59f1e2f3a563ed9c99072b75ea0ba482a7997c923ca73e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "24c6e30e524b96230a59f1e2f3a563ed9c99072b75ea0ba482a7997c923ca73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24c6e30e524b96230a59f1e2f3a563ed9c99072b75ea0ba482a7997c923ca73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24c6e30e524b96230a59f1e2f3a563ed9c99072b75ea0ba482a7997c923ca73e", kill_on_drop: false }`
[INFO] [stdout] 24c6e30e524b96230a59f1e2f3a563ed9c99072b75ea0ba482a7997c923ca73e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88217065f07ba8d1574eea561edc712653eaffcb7157f631f90ba56d5b9f90f3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "88217065f07ba8d1574eea561edc712653eaffcb7157f631f90ba56d5b9f90f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring_buffer v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:878:13
[INFO] [stdout]     |
[INFO] [stdout] 878 |             ((index & self.mask()).wrapping_sub(self.head) >= (self.capacity - self.len))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:880:13
[INFO] [stdout]     |
[INFO] [stdout] 880 |             ((index & self.mask()).wrapping_sub(self.tail) < self.len)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "88217065f07ba8d1574eea561edc712653eaffcb7157f631f90ba56d5b9f90f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88217065f07ba8d1574eea561edc712653eaffcb7157f631f90ba56d5b9f90f3", kill_on_drop: false }`
[INFO] [stdout] 88217065f07ba8d1574eea561edc712653eaffcb7157f631f90ba56d5b9f90f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a681ef0cb3e71e2198fe1bb2053e132e1c5fe3deddbb8242b6d5dd1feddc9437
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a681ef0cb3e71e2198fe1bb2053e132e1c5fe3deddbb8242b6d5dd1feddc9437", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:878:13
[INFO] [stdout]     |
[INFO] [stdout] 878 |             ((index & self.mask()).wrapping_sub(self.head) >= (self.capacity - self.len))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ring_buffer v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:880:13
[INFO] [stdout]     |
[INFO] [stdout] 880 |             ((index & self.mask()).wrapping_sub(self.tail) < self.len)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:878:13
[INFO] [stdout]     |
[INFO] [stdout] 878 |             ((index & self.mask()).wrapping_sub(self.head) >= (self.capacity - self.len))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:880:13
[INFO] [stdout]     |
[INFO] [stdout] 880 |             ((index & self.mask()).wrapping_sub(self.tail) < self.len)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "a681ef0cb3e71e2198fe1bb2053e132e1c5fe3deddbb8242b6d5dd1feddc9437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a681ef0cb3e71e2198fe1bb2053e132e1c5fe3deddbb8242b6d5dd1feddc9437", kill_on_drop: false }`
[INFO] [stdout] a681ef0cb3e71e2198fe1bb2053e132e1c5fe3deddbb8242b6d5dd1feddc9437
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5ce413bd69a8b6a9b9a1c87a438a73df08e8b243c99b4f3cc8222965606b9de2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5ce413bd69a8b6a9b9a1c87a438a73df08e8b243c99b4f3cc8222965606b9de2", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:878:13
[INFO] [stderr]     |
[INFO] [stderr] 878 |             ((index & self.mask()).wrapping_sub(self.head) >= (self.capacity - self.len))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:880:13
[INFO] [stderr]     |
[INFO] [stderr] 880 |             ((index & self.mask()).wrapping_sub(self.tail) < self.len)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:878:13
[INFO] [stderr]     |
[INFO] [stderr] 878 |             ((index & self.mask()).wrapping_sub(self.head) >= (self.capacity - self.len))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:880:13
[INFO] [stderr]     |
[INFO] [stderr] 880 |             ((index & self.mask()).wrapping_sub(self.tail) < self.len)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ring_buffer-92f217da61b01066
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests ring_buffer
[INFO] [stdout] test tests::access_and_reallocations ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:878:13
[INFO] [stderr]     |
[INFO] [stderr] 878 |             ((index & self.mask()).wrapping_sub(self.head) >= (self.capacity - self.len))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:880:13
[INFO] [stderr]     |
[INFO] [stderr] 880 |             ((index & self.mask()).wrapping_sub(self.tail) < self.len)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stdout] running 29 tests
[INFO] [stderr] 
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::is_empty (line 494) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::clear (line 218) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::get_relative (line 442) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::back_mut (line 180) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::capacity (line 203) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::front (line 265) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::get_relative_mut (line 467) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::get_absolute_unchecked (line 384) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::back (line 160) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::as_slices (line 114) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::get_absolute_mut_unchecked (line 413) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::get_absolute_mut (line 348) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::front_mut (line 285) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::is_full (line 511) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::contains (line 241) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::get_absolute (line 314) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::swap_absolute (line 821) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::iter (line 530) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::shrink_to (line 688) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::len (line 581) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::new (line 56) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::pop (line 599) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::push (line 630) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::iter_mut (line 555) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::reserve (line 663) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::shrink_to_fit (line 754) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::truncate (line 855) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::swap_relative (line 780) ... ok
[INFO] [stdout] test src/lib.rs - RingBuffer<T>::with_capacity (line 71) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 29 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 9.26s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5ce413bd69a8b6a9b9a1c87a438a73df08e8b243c99b4f3cc8222965606b9de2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce413bd69a8b6a9b9a1c87a438a73df08e8b243c99b4f3cc8222965606b9de2", kill_on_drop: false }`
[INFO] [stdout] 5ce413bd69a8b6a9b9a1c87a438a73df08e8b243c99b4f3cc8222965606b9de2