[INFO] fetching crate indexed-ring-buffer 0.1.3...
[INFO] building indexed-ring-buffer-0.1.3 against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] extracting crate indexed-ring-buffer 0.1.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate indexed-ring-buffer 0.1.3 on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate indexed-ring-buffer 0.1.3
[INFO] finished tweaking crates.io crate indexed-ring-buffer 0.1.3
[INFO] tweaked toml for crates.io crate indexed-ring-buffer 0.1.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c09c050a1be352cc45fc8f952633526f433dcc287fa48ab28742996740b8f8e
[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" "8c09c050a1be352cc45fc8f952633526f433dcc287fa48ab28742996740b8f8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c09c050a1be352cc45fc8f952633526f433dcc287fa48ab28742996740b8f8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c09c050a1be352cc45fc8f952633526f433dcc287fa48ab28742996740b8f8e", kill_on_drop: false }`
[INFO] [stdout] 8c09c050a1be352cc45fc8f952633526f433dcc287fa48ab28742996740b8f8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e584f9ae3a376a28d11d11e08dd80a8253a00f1db0ecb7d47fa347256276fd5e
[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" "e584f9ae3a376a28d11d11e08dd80a8253a00f1db0ecb7d47fa347256276fd5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling indexed-ring-buffer v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib.rs:168:13
[INFO] [stdout]     |
[INFO] [stdout] 168 |             mem::replace(buf.get_unchecked_mut(tail), MaybeUninit::new(v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `Command { std: "docker" "inspect" "e584f9ae3a376a28d11d11e08dd80a8253a00f1db0ecb7d47fa347256276fd5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e584f9ae3a376a28d11d11e08dd80a8253a00f1db0ecb7d47fa347256276fd5e", kill_on_drop: false }`
[INFO] [stdout] e584f9ae3a376a28d11d11e08dd80a8253a00f1db0ecb7d47fa347256276fd5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fdcc953eb4f31fe10dfa80435a6079a982b332d827c331889a3eba615813ceae
[INFO] running `Command { std: "docker" "start" "-a" "fdcc953eb4f31fe10dfa80435a6079a982b332d827c331889a3eba615813ceae", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib.rs:168:13
[INFO] [stdout]     |
[INFO] [stdout] 168 |             mem::replace(buf.get_unchecked_mut(tail), MaybeUninit::new(v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling rand_xoshiro v0.1.0
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling criterion-plot v0.3.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.4
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling criterion v0.2.11
[INFO] [stderr]    Compiling indexed-ring-buffer v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Consumer`, `Producer`, `Reader`
[INFO] [stdout]  --> tests/test.rs:3:48
[INFO] [stdout]   |
[INFO] [stdout] 3 | use indexed_ring_buffer::{indexed_ring_buffer, Consumer, Producer, Reader};
[INFO] [stdout]   |                                                ^^^^^^^^  ^^^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Consumer`, `Producer`
[INFO] [stdout]  --> tests/threads.rs:2:48
[INFO] [stdout]   |
[INFO] [stdout] 2 | use indexed_ring_buffer::{indexed_ring_buffer, Consumer, Producer, Reader};
[INFO] [stdout]   |                                                ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read`
[INFO] [stdout]  --> tests/test.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let (mut prod, mut cons, read) = indexed_ring_buffer::<usize>(0, 1);
[INFO] [stdout]   |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_read`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cons`
[INFO] [stdout]   --> tests/test.rs:94:24
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let (mut prod, mut cons, read) = indexed_ring_buffer::<usize>(n, 10);
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_cons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fm`
[INFO] [stdout]   --> tests/threads.rs:22:26
[INFO] [stdout]    |
[INFO] [stdout] 22 |             if let Some((fm, to, v)) = r.get_from(last_id.wrapping_add(1), READ_SIZE) {
[INFO] [stdout]    |                          ^^ help: if this is intentional, prefix it with an underscore: `_fm`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arc_data`
[INFO] [stdout]   --> tests/threads.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let arc_data = Arc::new(in_data.clone());
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arc_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/test.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let (mut prod, mut cons, read) = indexed_ring_buffer::<usize>(0, 10);
[INFO] [stdout]    |          ----^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/test.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let (mut prod, mut cons, read) = indexed_ring_buffer::<usize>(0, 10);
[INFO] [stdout]    |                    ----^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/test.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let (mut prod, mut cons, read) = indexed_ring_buffer::<usize>(n, 10);
[INFO] [stdout]    |                    ----^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib.rs:168:13
[INFO] [stdout]     |
[INFO] [stdout] 168 |             mem::replace(buf.get_unchecked_mut(tail), MaybeUninit::new(v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 30.45s
[INFO] running `Command { std: "docker" "inspect" "fdcc953eb4f31fe10dfa80435a6079a982b332d827c331889a3eba615813ceae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdcc953eb4f31fe10dfa80435a6079a982b332d827c331889a3eba615813ceae", kill_on_drop: false }`
[INFO] [stdout] fdcc953eb4f31fe10dfa80435a6079a982b332d827c331889a3eba615813ceae
