[INFO] fetching crate arc-buffer 0.1.0...
[INFO] testing arc-buffer-0.1.0 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate arc-buffer 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate arc-buffer 0.1.0 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "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-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "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" "+1871252fc8bb672d40787e67404e6eaae7059369" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db28046198cd4858349476b618029e66aa719485ed4a5c808ce53d7a5a139101
[INFO] running `Command { std: "docker" "start" "-a" "db28046198cd4858349476b618029e66aa719485ed4a5c808ce53d7a5a139101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db28046198cd4858349476b618029e66aa719485ed4a5c808ce53d7a5a139101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db28046198cd4858349476b618029e66aa719485ed4a5c808ce53d7a5a139101", kill_on_drop: false }`
[INFO] [stdout] db28046198cd4858349476b618029e66aa719485ed4a5c808ce53d7a5a139101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d851849151f4b5fd14e2178537c951ee2e5b5244e2d7c13720ebf81b9f5e660
[INFO] running `Command { std: "docker" "start" "-a" "7d851849151f4b5fd14e2178537c951ee2e5b5244e2d7c13720ebf81b9f5e660", kill_on_drop: false }`
[INFO] [stderr]    Compiling header-slice v0.1.3
[INFO] [stderr]    Compiling arc-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "7d851849151f4b5fd14e2178537c951ee2e5b5244e2d7c13720ebf81b9f5e660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d851849151f4b5fd14e2178537c951ee2e5b5244e2d7c13720ebf81b9f5e660", kill_on_drop: false }`
[INFO] [stdout] 7d851849151f4b5fd14e2178537c951ee2e5b5244e2d7c13720ebf81b9f5e660
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aba5a6849cc44cd9dff94a9c57435157572c721af3eb589e3756cc473568ccd0
[INFO] running `Command { std: "docker" "start" "-a" "aba5a6849cc44cd9dff94a9c57435157572c721af3eb589e3756cc473568ccd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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 `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "aba5a6849cc44cd9dff94a9c57435157572c721af3eb589e3756cc473568ccd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aba5a6849cc44cd9dff94a9c57435157572c721af3eb589e3756cc473568ccd0", kill_on_drop: false }`
[INFO] [stdout] aba5a6849cc44cd9dff94a9c57435157572c721af3eb589e3756cc473568ccd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5f427ed6025952e711753d410e717d3fd593a4a873e85f1a1f26c214bd4eb933
[INFO] running `Command { std: "docker" "start" "-a" "5f427ed6025952e711753d410e717d3fd593a4a873e85f1a1f26c214bd4eb933", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 4]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/create.rs:5:13
[INFO] [stderr]     |
[INFO] [stderr] 5   |     let v = arc_buf![1, 2, 3, 4];
[INFO] [stderr]     |             -------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: `#[warn(forgetting_copy_types)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 0]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/create.rs:11:29
[INFO] [stderr]     |
[INFO] [stderr] 11  |     let v: ArcBuffer<i32> = arc_buf![];
[INFO] [stderr]     |                             ---------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:35:30
[INFO] [stderr]     |
[INFO] [stderr] 35  |     let buf = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stderr]     |                              ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:45:31
[INFO] [stderr]     |
[INFO] [stderr] 45  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stderr]     |                               ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:58:31
[INFO] [stderr]     |
[INFO] [stderr] 58  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stderr]     |                               ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:71:31
[INFO] [stderr]     |
[INFO] [stderr] 71  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stderr]     |                               ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:89:35
[INFO] [stderr]     |
[INFO] [stderr] 89  |     let mut buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stderr]     |                                   ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 4]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:107:30
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let buf = with_drop_hook(arc_buf![1, 2, 3, 4], &D1);
[INFO] [stderr]     |                              -------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stderr]    --> src/test/utils.rs:50:35
[INFO] [stderr]     |
[INFO] [stderr] 50  |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 | /     parallel! {
[INFO] [stderr] 111 | |         [clone mut buf] {
[INFO] [stderr] 112 | |             buf.push(4);
[INFO] [stderr] 113 | |             set_drop_hook(&mut buf, &D2);
[INFO] [stderr] ...   |
[INFO] [stderr] 126 | |         };
[INFO] [stderr] 127 | |     }
[INFO] [stderr]     | |_____- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `forget` to avoid running Drop code
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 50  |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stderr]     |                                   +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stderr]   --> src/test/utils.rs:50:35
[INFO] [stderr]    |
[INFO] [stderr] 50 |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 87 | /     parallel! {
[INFO] [stderr] 88 | |        let x <- [clone a] { Q(a) };
[INFO] [stderr] 89 | |        let y <- [ref b] { Q(*b) };
[INFO] [stderr] 90 | |        {};
[INFO] [stderr] 91 | |     };
[INFO] [stderr]    | |_____- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: use `forget` to avoid running Drop code
[INFO] [stderr]    = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 50 |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stderr]    |                                   +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `arc-buffer` (lib test) generated 10 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/arc_buffer-918e7fcea425067b)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test test::create::create_with_macro ... ok
[INFO] [stdout] test test::create::create_with_macro_len ... ok
[INFO] [stdout] test test::create::create_with_macro_empty ... ok
[INFO] [stdout] test test::drop::drop_after_mutating_clone ... ok
[INFO] [stdout] test test::create::create_with_macro_len_empty ... ok
[INFO] [stdout] test test::drop::drop_after_mutating_original ... ok
[INFO] [stdout] test test::drop::drop_clone_first ... ok
[INFO] [stdout] test test::drop::drop_clone_last ... ok
[INFO] [stdout] test test::drop::drop_after_mutating_clone_parallel ... ok
[INFO] [stdout] test test::drop::drop_no_clones ... ok
[INFO] [stdout] test test::utils::parallel_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests arc_buffer
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5f427ed6025952e711753d410e717d3fd593a4a873e85f1a1f26c214bd4eb933", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f427ed6025952e711753d410e717d3fd593a4a873e85f1a1f26c214bd4eb933", kill_on_drop: false }`
[INFO] [stdout] 5f427ed6025952e711753d410e717d3fd593a4a873e85f1a1f26c214bd4eb933
[INFO] testing arc-buffer-0.1.0 against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] extracting crate arc-buffer 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate arc-buffer 0.1.0 on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "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-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "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" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b0166be7cbe8655e1443bfa4eed21582aa9e8ad0b41f2d96aa54af15dc8823c
[INFO] running `Command { std: "docker" "start" "-a" "4b0166be7cbe8655e1443bfa4eed21582aa9e8ad0b41f2d96aa54af15dc8823c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b0166be7cbe8655e1443bfa4eed21582aa9e8ad0b41f2d96aa54af15dc8823c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b0166be7cbe8655e1443bfa4eed21582aa9e8ad0b41f2d96aa54af15dc8823c", kill_on_drop: false }`
[INFO] [stdout] 4b0166be7cbe8655e1443bfa4eed21582aa9e8ad0b41f2d96aa54af15dc8823c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d825633db9b0443e4259b50312f3cb10096c882069b88b87e8956c5339db6409
[INFO] running `Command { std: "docker" "start" "-a" "d825633db9b0443e4259b50312f3cb10096c882069b88b87e8956c5339db6409", kill_on_drop: false }`
[INFO] [stderr]    Compiling header-slice v0.1.3
[INFO] [stderr]    Compiling arc-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "d825633db9b0443e4259b50312f3cb10096c882069b88b87e8956c5339db6409", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d825633db9b0443e4259b50312f3cb10096c882069b88b87e8956c5339db6409", kill_on_drop: false }`
[INFO] [stdout] d825633db9b0443e4259b50312f3cb10096c882069b88b87e8956c5339db6409
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 362fd30b204894ac18ab5b57aa71854ff1cedfae9c77495c88594619cca2359e
[INFO] running `Command { std: "docker" "start" "-a" "362fd30b204894ac18ab5b57aa71854ff1cedfae9c77495c88594619cca2359e", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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 `test` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "362fd30b204894ac18ab5b57aa71854ff1cedfae9c77495c88594619cca2359e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "362fd30b204894ac18ab5b57aa71854ff1cedfae9c77495c88594619cca2359e", kill_on_drop: false }`
[INFO] [stdout] 362fd30b204894ac18ab5b57aa71854ff1cedfae9c77495c88594619cca2359e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4c35760473f3bdca38e8aba9112ba80dc889c0dcf845653df302870e0726109e
[INFO] running `Command { std: "docker" "start" "-a" "4c35760473f3bdca38e8aba9112ba80dc889c0dcf845653df302870e0726109e", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 4]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/create.rs:5:13
[INFO] [stderr]     |
[INFO] [stderr] 5   |     let v = arc_buf![1, 2, 3, 4];
[INFO] [stderr]     |             -------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: `#[warn(forgetting_copy_types)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 0]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/create.rs:11:29
[INFO] [stderr]     |
[INFO] [stderr] 11  |     let v: ArcBuffer<i32> = arc_buf![];
[INFO] [stderr]     |                             ---------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:35:30
[INFO] [stderr]     |
[INFO] [stderr] 35  |     let buf = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stderr]     |                              ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:45:31
[INFO] [stderr]     |
[INFO] [stderr] 45  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stderr]     |                               ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:58:31
[INFO] [stderr]     |
[INFO] [stderr] 58  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &DROPPED);
[INFO] [stderr]     |                               ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:71:31
[INFO] [stderr]     |
[INFO] [stderr] 71  |     let buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stderr]     |                               ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 3]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:89:35
[INFO] [stderr]     |
[INFO] [stderr] 89  |     let mut buf1 = with_drop_hook(arc_buf![1, 2, 3], &D1);
[INFO] [stderr]     |                                   ----------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/buf.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |         core::mem::forget(vals);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^----^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           argument has type `[i32; 4]`
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:107:30
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let buf = with_drop_hook(arc_buf![1, 2, 3, 4], &D1);
[INFO] [stderr]     |                              -------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     = note: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stderr]    --> src/test/utils.rs:50:35
[INFO] [stderr]     |
[INFO] [stderr] 50  |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]    ::: src/test/drop.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 | /     parallel! {
[INFO] [stderr] 111 | |         [clone mut buf] {
[INFO] [stderr] 112 | |             buf.push(4);
[INFO] [stderr] 113 | |             set_drop_hook(&mut buf, &D2);
[INFO] [stderr] ...   |
[INFO] [stderr] 126 | |         };
[INFO] [stderr] 127 | |     }
[INFO] [stderr]     | |_____- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: use `forget` to avoid running Drop code
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 50  |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stderr]     |                                   +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `MaybeUninit::<T>::new` that must be used
[INFO] [stderr]   --> src/test/utils.rs:50:35
[INFO] [stderr]    |
[INFO] [stderr] 50 |                           $(*$v =)? core::mem::MaybeUninit::new($f);
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 87 | /     parallel! {
[INFO] [stderr] 88 | |        let x <- [clone a] { Q(a) };
[INFO] [stderr] 89 | |        let y <- [ref b] { Q(*b) };
[INFO] [stderr] 90 | |        {};
[INFO] [stderr] 91 | |     };
[INFO] [stderr]    | |_____- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: use `forget` to avoid running Drop code
[INFO] [stderr]    = note: this warning originates in the macro `parallel` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 50 |                         $(*$v =)? let _ = core::mem::MaybeUninit::new($f);
[INFO] [stderr]    |                                   +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `arc-buffer` (lib test) generated 10 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/arc_buffer-918e7fcea425067b)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test test::create::create_with_macro ... ok
[INFO] [stdout] test test::create::create_with_macro_empty ... ok
[INFO] [stdout] test test::create::create_with_macro_len_empty ... ok
[INFO] [stdout] test test::create::create_with_macro_len ... ok
[INFO] [stdout] test test::drop::drop_after_mutating_clone ... ok
[INFO] [stdout] test test::drop::drop_after_mutating_original ... ok
[INFO] [stdout] test test::drop::drop_clone_first ... ok
[INFO] [stdout] test test::drop::drop_clone_last ... ok
[INFO] [stdout] test test::drop::drop_no_clones ... ok
[INFO] [stdout] test test::drop::drop_after_mutating_clone_parallel ... ok
[INFO] [stdout] test test::utils::parallel_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests arc_buffer
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4c35760473f3bdca38e8aba9112ba80dc889c0dcf845653df302870e0726109e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c35760473f3bdca38e8aba9112ba80dc889c0dcf845653df302870e0726109e", kill_on_drop: false }`
[INFO] [stdout] 4c35760473f3bdca38e8aba9112ba80dc889c0dcf845653df302870e0726109e
