[INFO] fetching crate arc-buffer 0.1.0...
[INFO] checking arc-buffer-0.1.0 against try#47af3d0de9d26c7deba4cfb203b710cc3f764e91 for pr-130443
[INFO] extracting crate arc-buffer 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate arc-buffer 0.1.0 on toolchain 47af3d0de9d26c7deba4cfb203b710cc3f764e91
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+47af3d0de9d26c7deba4cfb203b710cc3f764e91" "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-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+47af3d0de9d26c7deba4cfb203b710cc3f764e91" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+47af3d0de9d26c7deba4cfb203b710cc3f764e91" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+47af3d0de9d26c7deba4cfb203b710cc3f764e91" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bbe7434792cdda20b0c6186089856705c644fbcb67a0cc30f16a73c1a64a4dc
[INFO] running `Command { std: "docker" "start" "-a" "1bbe7434792cdda20b0c6186089856705c644fbcb67a0cc30f16a73c1a64a4dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1bbe7434792cdda20b0c6186089856705c644fbcb67a0cc30f16a73c1a64a4dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bbe7434792cdda20b0c6186089856705c644fbcb67a0cc30f16a73c1a64a4dc", kill_on_drop: false }`
[INFO] [stdout] 1bbe7434792cdda20b0c6186089856705c644fbcb67a0cc30f16a73c1a64a4dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+47af3d0de9d26c7deba4cfb203b710cc3f764e91" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc193a9000676d9e649162cc5f2a6b21e4e5d979d215f3c5df407c50998c7ea1
[INFO] running `Command { std: "docker" "start" "-a" "dc193a9000676d9e649162cc5f2a6b21e4e5d979d215f3c5df407c50998c7ea1", 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: `#[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] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[INFO] [stdout]     |
[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: this warning originates in the macro `arc_buf` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 397 -         core::mem::forget(vals);
[INFO] [stdout] 397 +         let _ = vals;
[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]    ::: 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" "dc193a9000676d9e649162cc5f2a6b21e4e5d979d215f3c5df407c50998c7ea1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc193a9000676d9e649162cc5f2a6b21e4e5d979d215f3c5df407c50998c7ea1", kill_on_drop: false }`
[INFO] [stdout] dc193a9000676d9e649162cc5f2a6b21e4e5d979d215f3c5df407c50998c7ea1
