[INFO] fetching crate arc-buffer 0.1.0...
[INFO] checking arc-buffer-0.1.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate arc-buffer 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate arc-buffer 0.1.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arc-buffer 0.1.0
[INFO] finished tweaking crates.io crate arc-buffer 0.1.0
[INFO] tweaked toml for crates.io crate arc-buffer 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded header-slice v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cf748f8241feb694c12a1636032601ba79d4ebfddbec42c07e888dac3cf14ab
[INFO] running `Command { std: "docker" "start" "-a" "9cf748f8241feb694c12a1636032601ba79d4ebfddbec42c07e888dac3cf14ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cf748f8241feb694c12a1636032601ba79d4ebfddbec42c07e888dac3cf14ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cf748f8241feb694c12a1636032601ba79d4ebfddbec42c07e888dac3cf14ab", kill_on_drop: false }`
[INFO] [stdout] 9cf748f8241feb694c12a1636032601ba79d4ebfddbec42c07e888dac3cf14ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d50dae644f0514e0a4aef03ff3cd9af865653b24858b521399a4a133e27cdd5e
[INFO] running `Command { std: "docker" "start" "-a" "d50dae644f0514e0a4aef03ff3cd9af865653b24858b521399a4a133e27cdd5e", kill_on_drop: false }`
[INFO] [stderr]     Checking header-slice v0.1.3
[INFO] [stderr]     Checking arc-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 4]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/create.rs:5:13
[INFO] [stdout]     |
[INFO] [stdout] 5   |     let v = arc_buf![1, 2, 3, 4];
[INFO] [stdout]     |             -------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(forgetting_copy_types)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 0]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/create.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |     let v: ArcBuffer<i32> = arc_buf![];
[INFO] [stdout]     |                             ---------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:35:30
[INFO] [stdout]     |
[INFO] [stdout] 35  |     let buf = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stdout]     |                              ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:45:31
[INFO] [stdout]     |
[INFO] [stdout] 45  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stdout]     |                               ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:58:31
[INFO] [stdout]     |
[INFO] [stdout] 58  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stdout]     |                               ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:71:31
[INFO] [stdout]     |
[INFO] [stdout] 71  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stdout]     |                               ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:89:35
[INFO] [stdout]     |
[INFO] [stdout] 89  |     let mut buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stdout]     |                                   ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 4]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:107:30
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let buf = with_drop_hook(arc_buf![1, 2, 3, 4], &D1);
[INFO] [stdout]     |                              -------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stdout]    --> src/test/utils.rs:50:35
[INFO] [stdout]     |
[INFO] [stdout] 50  |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:110:5
[INFO] [stdout]     |
[INFO] [stdout] 110 | /     parallel! {
[INFO] [stdout] 111 | |         [clone mut buf] {
[INFO] [stdout] 112 | |             buf.push(4);
[INFO] [stdout] 113 | |             set_drop_hook(&mut buf, &D2);
[INFO] [stdout] ...   |
[INFO] [stdout] 126 | |         };
[INFO] [stdout] 127 | |     }
[INFO] [stdout]     | |_____- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `forget` to avoid running Drop code
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 50  |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stdout]     |                                   +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stdout]   --> src/test/utils.rs:50:35
[INFO] [stdout]    |
[INFO] [stdout] 50 |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 | /     parallel! {
[INFO] [stdout] 88 | |        let x <- [clone a] { Q(a) };
[INFO] [stdout] 89 | |        let y <- [ref b] { Q(*b) };
[INFO] [stdout] 90 | |        {};
[INFO] [stdout] 91 | |     };
[INFO] [stdout]    | |_____- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `forget` to avoid running Drop code
[INFO] [stdout]    = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stdout]    |                                   +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "d50dae644f0514e0a4aef03ff3cd9af865653b24858b521399a4a133e27cdd5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d50dae644f0514e0a4aef03ff3cd9af865653b24858b521399a4a133e27cdd5e", kill_on_drop: false }`
[INFO] [stdout] d50dae644f0514e0a4aef03ff3cd9af865653b24858b521399a4a133e27cdd5e
[INFO] checking arc-buffer-0.1.0 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate arc-buffer 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate arc-buffer 0.1.0 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arc-buffer 0.1.0
[INFO] finished tweaking crates.io crate arc-buffer 0.1.0
[INFO] tweaked toml for crates.io crate arc-buffer 0.1.0 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" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f52183056ec1bc3f3ce276cb9be9a6af4aa15606209c4979c4440223e9be9add
[INFO] running `Command { std: "docker" "start" "-a" "f52183056ec1bc3f3ce276cb9be9a6af4aa15606209c4979c4440223e9be9add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f52183056ec1bc3f3ce276cb9be9a6af4aa15606209c4979c4440223e9be9add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f52183056ec1bc3f3ce276cb9be9a6af4aa15606209c4979c4440223e9be9add", kill_on_drop: false }`
[INFO] [stdout] f52183056ec1bc3f3ce276cb9be9a6af4aa15606209c4979c4440223e9be9add
[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" "-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd11eca2b481c30e179e8a2409c7e141090146fe3499773c3473cf26615af15f
[INFO] running `Command { std: "docker" "start" "-a" "bd11eca2b481c30e179e8a2409c7e141090146fe3499773c3473cf26615af15f", kill_on_drop: false }`
[INFO] [stderr]     Checking header-slice v0.1.3
[INFO] [stderr]     Checking arc-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 4]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/create.rs:5:13
[INFO] [stdout]     |
[INFO] [stdout] 5   |     let v = arc_buf![1, 2, 3, 4];
[INFO] [stdout]     |             -------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(forgetting_copy_types)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 0]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/create.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |     let v: ArcBuffer<i32> = arc_buf![];
[INFO] [stdout]     |                             ---------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:35:30
[INFO] [stdout]     |
[INFO] [stdout] 35  |     let buf = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stdout]     |                              ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:45:31
[INFO] [stdout]     |
[INFO] [stdout] 45  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stdout]     |                               ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:58:31
[INFO] [stdout]     |
[INFO] [stdout] 58  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stdout]     |                               ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:71:31
[INFO] [stdout]     |
[INFO] [stdout] 71  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stdout]     |                               ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 3]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:89:35
[INFO] [stdout]     |
[INFO] [stdout] 89  |     let mut buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stdout]     |                                   ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/buf.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |         core::mem::forget(vals);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `[i32; 4]`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:107:30
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let buf = with_drop_hook(arc_buf![1, 2, 3, 4], &D1);
[INFO] [stdout]     |                              -------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stdout]    --> src/test/utils.rs:50:35
[INFO] [stdout]     |
[INFO] [stdout] 50  |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/test/drop.rs:110:5
[INFO] [stdout]     |
[INFO] [stdout] 110 | /     parallel! {
[INFO] [stdout] 111 | |         [clone mut buf] {
[INFO] [stdout] 112 | |             buf.push(4);
[INFO] [stdout] 113 | |             set_drop_hook(&mut buf, &D2);
[INFO] [stdout] ...   |
[INFO] [stdout] 126 | |         };
[INFO] [stdout] 127 | |     }
[INFO] [stdout]     | |_____- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `forget` to avoid running Drop code
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 50  |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stdout]     |                                   +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stdout]   --> src/test/utils.rs:50:35
[INFO] [stdout]    |
[INFO] [stdout] 50 |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 | /     parallel! {
[INFO] [stdout] 88 | |        let x <- [clone a] { Q(a) };
[INFO] [stdout] 89 | |        let y <- [ref b] { Q(*b) };
[INFO] [stdout] 90 | |        {};
[INFO] [stdout] 91 | |     };
[INFO] [stdout]    | |_____- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `forget` to avoid running Drop code
[INFO] [stdout]    = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stdout]    |                                   +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "bd11eca2b481c30e179e8a2409c7e141090146fe3499773c3473cf26615af15f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd11eca2b481c30e179e8a2409c7e141090146fe3499773c3473cf26615af15f", kill_on_drop: false }`
[INFO] [stdout] bd11eca2b481c30e179e8a2409c7e141090146fe3499773c3473cf26615af15f
