[INFO] fetching crate jobsys 0.2.0...
[INFO] checking jobsys-0.2.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate jobsys 0.2.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate jobsys 0.2.0 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 jobsys 0.2.0
[INFO] finished tweaking crates.io crate jobsys 0.2.0
[INFO] tweaked toml for crates.io crate jobsys 0.2.0 written to /workspace/builds/worker-3-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] dd2ba18720cc2092a726a10658df15f0101813ed10241f6e8f57e2a08ea0388f
[INFO] running `Command { std: "docker" "start" "-a" "dd2ba18720cc2092a726a10658df15f0101813ed10241f6e8f57e2a08ea0388f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd2ba18720cc2092a726a10658df15f0101813ed10241f6e8f57e2a08ea0388f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd2ba18720cc2092a726a10658df15f0101813ed10241f6e8f57e2a08ea0388f", kill_on_drop: false }`
[INFO] [stdout] dd2ba18720cc2092a726a10658df15f0101813ed10241f6e8f57e2a08ea0388f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 8125c0fc5d3240d9db50012651f0be6b078372bc3eb84c48360ba1d3c3446018
[INFO] running `Command { std: "docker" "start" "-a" "8125c0fc5d3240d9db50012651f0be6b078372bc3eb84c48360ba1d3c3446018", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking jobsys v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/queues.rs:196:17
[INFO] [stdout]     |
[INFO] [stdout] 196 |             let mut access = queue.guarded_data.get_mut().unwrap();
[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: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/thread.rs:45:25
[INFO] [stdout]    |
[INFO] [stdout] 45 |         debug_assert!(it.borrow().get() == usize::MAX);
[INFO] [stdout]    |                         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Cell<usize>` does not implement `Borrow`, so calling `borrow` on `&Cell<usize>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 45 -         debug_assert!(it.borrow().get() == usize::MAX);
[INFO] [stdout] 45 +         debug_assert!(it.get() == usize::MAX);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/thread.rs:45:25
[INFO] [stdout]    |
[INFO] [stdout] 45 |         debug_assert!(it.borrow().get() == usize::MAX);
[INFO] [stdout]    |                         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Cell<usize>` does not implement `Borrow`, so calling `borrow` on `&Cell<usize>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 45 -         debug_assert!(it.borrow().get() == usize::MAX);
[INFO] [stdout] 45 +         debug_assert!(it.get() == usize::MAX);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `Command { std: "docker" "inspect" "8125c0fc5d3240d9db50012651f0be6b078372bc3eb84c48360ba1d3c3446018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8125c0fc5d3240d9db50012651f0be6b078372bc3eb84c48360ba1d3c3446018", kill_on_drop: false }`
[INFO] [stdout] 8125c0fc5d3240d9db50012651f0be6b078372bc3eb84c48360ba1d3c3446018