[INFO] fetching crate lockfree-ringbuffer 0.1.3...
[INFO] checking lockfree-ringbuffer-0.1.3 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate lockfree-ringbuffer 0.1.3 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate lockfree-ringbuffer 0.1.3 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lockfree-ringbuffer 0.1.3
[INFO] finished tweaking crates.io crate lockfree-ringbuffer 0.1.3
[INFO] tweaked toml for crates.io crate lockfree-ringbuffer 0.1.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages to latest compatible versions
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de4de8c6297045da5cdf8ff631df04643970e463522f5511d9928e17f0a761f4
[INFO] running `Command { std: "docker" "start" "-a" "de4de8c6297045da5cdf8ff631df04643970e463522f5511d9928e17f0a761f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de4de8c6297045da5cdf8ff631df04643970e463522f5511d9928e17f0a761f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de4de8c6297045da5cdf8ff631df04643970e463522f5511d9928e17f0a761f4", kill_on_drop: false }`
[INFO] [stdout] de4de8c6297045da5cdf8ff631df04643970e463522f5511d9928e17f0a761f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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 -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23e9640a212fb6f0e0fc77b027a8d25cbe9a1aec89e869bacebbd45f2b7360e0
[INFO] running `Command { std: "docker" "start" "-a" "23e9640a212fb6f0e0fc77b027a8d25cbe9a1aec89e869bacebbd45f2b7360e0", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking lockfree-ringbuffer v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/threadsafe.rs:137:18
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 .compare_and_swap(tail.into(), (tail + 1).into(), Ordering::SeqCst)
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/threadsafe.rs:198:18
[INFO] [stdout]     |
[INFO] [stdout] 198 |                 .compare_and_swap(tail.into(), new_tail.into(), Ordering::SeqCst)
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Tail` is more private than the item `RingIter::current_tail`
[INFO] [stdout]    --> src/threadsafe.rs:239:5
[INFO] [stdout]     |
[INFO] [stdout] 239 |     pub(crate) current_tail: Tail,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `RingIter::current_tail` is reachable at visibility `pub(crate)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `Tail` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/threadsafe.rs:57:1
[INFO] [stdout]     |
[INFO] [stdout] 57  | struct Tail {
[INFO] [stdout]     | ^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/threadsafe.rs:137:18
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 .compare_and_swap(tail.into(), (tail + 1).into(), Ordering::SeqCst)
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/threadsafe.rs:198:18
[INFO] [stdout]     |
[INFO] [stdout] 198 |                 .compare_and_swap(tail.into(), new_tail.into(), Ordering::SeqCst)
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/threadsafe.rs:334:17
[INFO] [stdout]     |
[INFO] [stdout] 334 |             for i in 1..1000 {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `threadsafe::Tail` is more private than the item `RingIter::current_tail`
[INFO] [stdout]    --> src/threadsafe.rs:239:5
[INFO] [stdout]     |
[INFO] [stdout] 239 |     pub(crate) current_tail: Tail,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `RingIter::current_tail` is reachable at visibility `pub(crate)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `threadsafe::Tail` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/threadsafe.rs:57:1
[INFO] [stdout]     |
[INFO] [stdout] 57  | struct Tail {
[INFO] [stdout]     | ^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "23e9640a212fb6f0e0fc77b027a8d25cbe9a1aec89e869bacebbd45f2b7360e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23e9640a212fb6f0e0fc77b027a8d25cbe9a1aec89e869bacebbd45f2b7360e0", kill_on_drop: false }`
[INFO] [stdout] 23e9640a212fb6f0e0fc77b027a8d25cbe9a1aec89e869bacebbd45f2b7360e0