[INFO] fetching crate intrusive-collections 0.9.2...
[INFO] testing intrusive-collections-0.9.2 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate intrusive-collections 0.9.2 into /workspace/builds/worker-32/source
[INFO] validating manifest of crates.io crate intrusive-collections 0.9.2 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate intrusive-collections 0.9.2
[INFO] finished tweaking crates.io crate intrusive-collections 0.9.2
[INFO] tweaked toml for crates.io crate intrusive-collections 0.9.2 written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11568f560e6584b7a3569d4976533c98e730692f1f1d9d634be305e1d6e5ca80
[INFO] running `Command { std: "docker" "start" "-a" "11568f560e6584b7a3569d4976533c98e730692f1f1d9d634be305e1d6e5ca80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11568f560e6584b7a3569d4976533c98e730692f1f1d9d634be305e1d6e5ca80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11568f560e6584b7a3569d4976533c98e730692f1f1d9d634be305e1d6e5ca80", kill_on_drop: false }`
[INFO] [stdout] 11568f560e6584b7a3569d4976533c98e730692f1f1d9d634be305e1d6e5ca80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 861174a53fba469202f2feb472b25899ee8ade81544c60baa5e515935b3619c3
[INFO] running `Command { std: "docker" "start" "-a" "861174a53fba469202f2feb472b25899ee8ade81544c60baa5e515935b3619c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling intrusive-collections v0.9.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:692:38
[INFO] [stdout]     |
[INFO] [stdout] 692 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:693:38
[INFO] [stdout]     |
[INFO] [stdout] 693 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:720:38
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:721:38
[INFO] [stdout]     |
[INFO] [stdout] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:488:33
[INFO] [stdout]     |
[INFO] [stdout] 488 |     let y = link_ops.right(ptr).unwrap_unchecked();
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:512:32
[INFO] [stdout]     |
[INFO] [stdout] 512 |     let y = link_ops.left(ptr).unwrap_unchecked();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:543:51
[INFO] [stdout]     |
[INFO] [stdout] 543 |         let grandparent = link_ops.parent(parent).unwrap_unchecked();
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:566:36
[INFO] [stdout]     |
[INFO] [stdout] 566 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:568:36
[INFO] [stdout]     |
[INFO] [stdout] 568 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:592:36
[INFO] [stdout]     |
[INFO] [stdout] 592 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:594:36
[INFO] [stdout]     |
[INFO] [stdout] 594 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:607:29
[INFO] [stdout]     |
[INFO] [stdout] 607 |         next(link_ops, ptr).unwrap_unchecked()
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:643:46
[INFO] [stdout]     |
[INFO] [stdout] 643 |         link_ops.set_parent(link_ops.left(y).unwrap_unchecked(), Some(y));
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:654:27
[INFO] [stdout]     |
[INFO] [stdout] 654 |             let mut w = w.unwrap_unchecked();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:656:55
[INFO] [stdout]     |
[INFO] [stdout] 656 |                 let mut w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:663:53
[INFO] [stdout]     |
[INFO] [stdout] 663 | ...                   .right(link_ops.left(w).unwrap_unchecked())
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:664:30
[INFO] [stdout]     |
[INFO] [stdout] 664 | ...                   .unwrap_unchecked();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:665:55
[INFO] [stdout]     |
[INFO] [stdout] 665 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:678:71
[INFO] [stdout]     |
[INFO] [stdout] 678 |                         let w_grandparent = link_ops.parent(w_parent).unwrap_unchecked();
[INFO] [stdout]     |                                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:680:59
[INFO] [stdout]     |
[INFO] [stdout] 680 | ...                   link_ops.right(w_grandparent).unwrap_unchecked()
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:682:58
[INFO] [stdout]     |
[INFO] [stdout] 682 | ...                   link_ops.left(w_grandparent).unwrap_unchecked()
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:686:65
[INFO] [stdout]     |
[INFO] [stdout] 686 | ...                   link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:689:52
[INFO] [stdout]     |
[INFO] [stdout] 689 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:690:59
[INFO] [stdout]     |
[INFO] [stdout] 690 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:694:62
[INFO] [stdout]     |
[INFO] [stdout] 694 |                         link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:704:53
[INFO] [stdout]     |
[INFO] [stdout] 704 | ...                   .left(link_ops.right(w).unwrap_unchecked())
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:705:30
[INFO] [stdout]     |
[INFO] [stdout] 705 | ...                   .unwrap_unchecked();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:706:55
[INFO] [stdout]     |
[INFO] [stdout] 706 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:721:55
[INFO] [stdout]     |
[INFO] [stdout] 721 | ...                   link_ops.parent(w_parent).unwrap_unchecked(),
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:724:66
[INFO] [stdout]     |
[INFO] [stdout] 724 | ...                   .right(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:725:34
[INFO] [stdout]     |
[INFO] [stdout] 725 | ...                   .unwrap_unchecked()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:728:65
[INFO] [stdout]     |
[INFO] [stdout] 728 | ...                   .left(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:729:34
[INFO] [stdout]     |
[INFO] [stdout] 729 | ...                   .unwrap_unchecked()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:733:66
[INFO] [stdout]     |
[INFO] [stdout] 733 | ...                   link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:736:52
[INFO] [stdout]     |
[INFO] [stdout] 736 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:737:59
[INFO] [stdout]     |
[INFO] [stdout] 737 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:741:61
[INFO] [stdout]     |
[INFO] [stdout] 741 |                         link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/rbtree.rs:1069:60
[INFO] [stdout]      |
[INFO] [stdout] 1069 |                         let next = next(link_ops, current).unwrap_unchecked();
[INFO] [stdout]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/rbtree.rs:1111:60
[INFO] [stdout]      |
[INFO] [stdout] 1111 |                         let prev = prev(link_ops, current).unwrap_unchecked();
[INFO] [stdout]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:720:38
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:721:38
[INFO] [stdout]     |
[INFO] [stdout] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:758:38
[INFO] [stdout]     |
[INFO] [stdout] 758 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:759:38
[INFO] [stdout]     |
[INFO] [stdout] 759 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 43 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `Command { std: "docker" "inspect" "861174a53fba469202f2feb472b25899ee8ade81544c60baa5e515935b3619c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "861174a53fba469202f2feb472b25899ee8ade81544c60baa5e515935b3619c3", kill_on_drop: false }`
[INFO] [stdout] 861174a53fba469202f2feb472b25899ee8ade81544c60baa5e515935b3619c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b352805262ba9cdf225d3421e5edd785331c261bb8ab5d75330365e5cef8636
[INFO] running `Command { std: "docker" "start" "-a" "6b352805262ba9cdf225d3421e5edd785331c261bb8ab5d75330365e5cef8636", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling typed-arena v2.0.1
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:692:38
[INFO] [stdout]     |
[INFO] [stdout] 692 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:693:38
[INFO] [stdout]     |
[INFO] [stdout] 693 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:720:38
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:721:38
[INFO] [stdout]     |
[INFO] [stdout] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:488:33
[INFO] [stdout]     |
[INFO] [stdout] 488 |     let y = link_ops.right(ptr).unwrap_unchecked();
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:512:32
[INFO] [stdout]     |
[INFO] [stdout] 512 |     let y = link_ops.left(ptr).unwrap_unchecked();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:543:51
[INFO] [stdout]     |
[INFO] [stdout] 543 |         let grandparent = link_ops.parent(parent).unwrap_unchecked();
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:566:36
[INFO] [stdout]     |
[INFO] [stdout] 566 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:568:36
[INFO] [stdout]     |
[INFO] [stdout] 568 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:592:36
[INFO] [stdout]     |
[INFO] [stdout] 592 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:594:36
[INFO] [stdout]     |
[INFO] [stdout] 594 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:607:29
[INFO] [stdout]     |
[INFO] [stdout] 607 |         next(link_ops, ptr).unwrap_unchecked()
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:643:46
[INFO] [stdout]     |
[INFO] [stdout] 643 |         link_ops.set_parent(link_ops.left(y).unwrap_unchecked(), Some(y));
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:654:27
[INFO] [stdout]     |
[INFO] [stdout] 654 |             let mut w = w.unwrap_unchecked();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:656:55
[INFO] [stdout]     |
[INFO] [stdout] 656 |                 let mut w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:663:53
[INFO] [stdout]     |
[INFO] [stdout] 663 | ...                   .right(link_ops.left(w).unwrap_unchecked())
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:664:30
[INFO] [stdout]     |
[INFO] [stdout] 664 | ...                   .unwrap_unchecked();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:665:55
[INFO] [stdout]     |
[INFO] [stdout] 665 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:678:71
[INFO] [stdout]     |
[INFO] [stdout] 678 |                         let w_grandparent = link_ops.parent(w_parent).unwrap_unchecked();
[INFO] [stdout]     |                                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:680:59
[INFO] [stdout]     |
[INFO] [stdout] 680 | ...                   link_ops.right(w_grandparent).unwrap_unchecked()
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:682:58
[INFO] [stdout]     |
[INFO] [stdout] 682 | ...                   link_ops.left(w_grandparent).unwrap_unchecked()
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:686:65
[INFO] [stdout]     |
[INFO] [stdout] 686 | ...                   link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:689:52
[INFO] [stdout]     |
[INFO] [stdout] 689 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:690:59
[INFO] [stdout]     |
[INFO] [stdout] 690 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:694:62
[INFO] [stdout]     |
[INFO] [stdout] 694 |                         link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:704:53
[INFO] [stdout]     |
[INFO] [stdout] 704 | ...                   .left(link_ops.right(w).unwrap_unchecked())
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:705:30
[INFO] [stdout]     |
[INFO] [stdout] 705 | ...                   .unwrap_unchecked();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:706:55
[INFO] [stdout]     |
[INFO] [stdout] 706 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:721:55
[INFO] [stdout]     |
[INFO] [stdout] 721 | ...                   link_ops.parent(w_parent).unwrap_unchecked(),
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:724:66
[INFO] [stdout]     |
[INFO] [stdout] 724 | ...                   .right(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:725:34
[INFO] [stdout]     |
[INFO] [stdout] 725 | ...                   .unwrap_unchecked()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:728:65
[INFO] [stdout]     |
[INFO] [stdout] 728 | ...                   .left(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:729:34
[INFO] [stdout]     |
[INFO] [stdout] 729 | ...                   .unwrap_unchecked()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:733:66
[INFO] [stdout]     |
[INFO] [stdout] 733 | ...                   link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:736:52
[INFO] [stdout]     |
[INFO] [stdout] 736 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:737:59
[INFO] [stdout]     |
[INFO] [stdout] 737 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:741:61
[INFO] [stdout]     |
[INFO] [stdout] 741 |                         link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/rbtree.rs:1069:60
[INFO] [stdout]      |
[INFO] [stdout] 1069 |                         let next = next(link_ops, current).unwrap_unchecked();
[INFO] [stdout]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/rbtree.rs:1111:60
[INFO] [stdout]      |
[INFO] [stdout] 1111 |                         let prev = prev(link_ops, current).unwrap_unchecked();
[INFO] [stdout]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:720:38
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:721:38
[INFO] [stdout]     |
[INFO] [stdout] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:758:38
[INFO] [stdout]     |
[INFO] [stdout] 758 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:759:38
[INFO] [stdout]     |
[INFO] [stdout] 759 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 43 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand_xorshift v0.3.0
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling intrusive-collections v0.9.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute `deny`
[INFO] [stdout]    --> src/adapter.rs:277:5
[INFO] [stdout]     |
[INFO] [stdout] 277 |     #[deny(missing_docs)]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] note: the built-in attribute `deny` will be ignored, since it's applied to the macro invocation `intrusive_adapter`
[INFO] [stdout]    --> src/adapter.rs:278:5
[INFO] [stdout]     |
[INFO] [stdout] 278 |     intrusive_adapter! {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:692:38
[INFO] [stdout]     |
[INFO] [stdout] 692 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:693:38
[INFO] [stdout]     |
[INFO] [stdout] 693 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:720:38
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/linked_list.rs:721:38
[INFO] [stdout]     |
[INFO] [stdout] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:488:33
[INFO] [stdout]     |
[INFO] [stdout] 488 |     let y = link_ops.right(ptr).unwrap_unchecked();
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:512:32
[INFO] [stdout]     |
[INFO] [stdout] 512 |     let y = link_ops.left(ptr).unwrap_unchecked();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:543:51
[INFO] [stdout]     |
[INFO] [stdout] 543 |         let grandparent = link_ops.parent(parent).unwrap_unchecked();
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:566:36
[INFO] [stdout]     |
[INFO] [stdout] 566 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:568:36
[INFO] [stdout]     |
[INFO] [stdout] 568 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:592:36
[INFO] [stdout]     |
[INFO] [stdout] 592 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:594:36
[INFO] [stdout]     |
[INFO] [stdout] 594 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:607:29
[INFO] [stdout]     |
[INFO] [stdout] 607 |         next(link_ops, ptr).unwrap_unchecked()
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:643:46
[INFO] [stdout]     |
[INFO] [stdout] 643 |         link_ops.set_parent(link_ops.left(y).unwrap_unchecked(), Some(y));
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:654:27
[INFO] [stdout]     |
[INFO] [stdout] 654 |             let mut w = w.unwrap_unchecked();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:656:55
[INFO] [stdout]     |
[INFO] [stdout] 656 |                 let mut w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:663:53
[INFO] [stdout]     |
[INFO] [stdout] 663 | ...                   .right(link_ops.left(w).unwrap_unchecked())
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:664:30
[INFO] [stdout]     |
[INFO] [stdout] 664 | ...                   .unwrap_unchecked();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:665:55
[INFO] [stdout]     |
[INFO] [stdout] 665 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:678:71
[INFO] [stdout]     |
[INFO] [stdout] 678 |                         let w_grandparent = link_ops.parent(w_parent).unwrap_unchecked();
[INFO] [stdout]     |                                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:680:59
[INFO] [stdout]     |
[INFO] [stdout] 680 | ...                   link_ops.right(w_grandparent).unwrap_unchecked()
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:682:58
[INFO] [stdout]     |
[INFO] [stdout] 682 | ...                   link_ops.left(w_grandparent).unwrap_unchecked()
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:686:65
[INFO] [stdout]     |
[INFO] [stdout] 686 | ...                   link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:689:52
[INFO] [stdout]     |
[INFO] [stdout] 689 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:690:59
[INFO] [stdout]     |
[INFO] [stdout] 690 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:694:62
[INFO] [stdout]     |
[INFO] [stdout] 694 |                         link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:704:53
[INFO] [stdout]     |
[INFO] [stdout] 704 | ...                   .left(link_ops.right(w).unwrap_unchecked())
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:705:30
[INFO] [stdout]     |
[INFO] [stdout] 705 | ...                   .unwrap_unchecked();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:706:55
[INFO] [stdout]     |
[INFO] [stdout] 706 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:721:55
[INFO] [stdout]     |
[INFO] [stdout] 721 | ...                   link_ops.parent(w_parent).unwrap_unchecked(),
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:724:66
[INFO] [stdout]     |
[INFO] [stdout] 724 | ...                   .right(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:725:34
[INFO] [stdout]     |
[INFO] [stdout] 725 | ...                   .unwrap_unchecked()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:728:65
[INFO] [stdout]     |
[INFO] [stdout] 728 | ...                   .left(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:729:34
[INFO] [stdout]     |
[INFO] [stdout] 729 | ...                   .unwrap_unchecked()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:733:66
[INFO] [stdout]     |
[INFO] [stdout] 733 | ...                   link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:736:52
[INFO] [stdout]     |
[INFO] [stdout] 736 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:737:59
[INFO] [stdout]     |
[INFO] [stdout] 737 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/rbtree.rs:741:61
[INFO] [stdout]     |
[INFO] [stdout] 741 |                         link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stdout]     |                                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/rbtree.rs:1069:60
[INFO] [stdout]      |
[INFO] [stdout] 1069 |                         let next = next(link_ops, current).unwrap_unchecked();
[INFO] [stdout]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/rbtree.rs:1111:60
[INFO] [stdout]      |
[INFO] [stdout] 1111 |                         let prev = prev(link_ops, current).unwrap_unchecked();
[INFO] [stdout]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:720:38
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:721:38
[INFO] [stdout]     |
[INFO] [stdout] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:758:38
[INFO] [stdout]     |
[INFO] [stdout] 758 |                 let head = list.head.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/xor_linked_list.rs:759:38
[INFO] [stdout]     |
[INFO] [stdout] 759 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 44 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.65s
[INFO] running `Command { std: "docker" "inspect" "6b352805262ba9cdf225d3421e5edd785331c261bb8ab5d75330365e5cef8636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b352805262ba9cdf225d3421e5edd785331c261bb8ab5d75330365e5cef8636", kill_on_drop: false }`
[INFO] [stdout] 6b352805262ba9cdf225d3421e5edd785331c261bb8ab5d75330365e5cef8636
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 739b1248fef2fe235de4ccdb8b96c781527856bf46e7507589263416275c1469
[INFO] running `Command { std: "docker" "start" "-a" "739b1248fef2fe235de4ccdb8b96c781527856bf46e7507589263416275c1469", kill_on_drop: false }`
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/linked_list.rs:692:38
[INFO] [stderr]     |
[INFO] [stderr] 692 |                 let head = list.head.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/linked_list.rs:693:38
[INFO] [stderr]     |
[INFO] [stderr] 693 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/linked_list.rs:720:38
[INFO] [stderr]     |
[INFO] [stderr] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/linked_list.rs:721:38
[INFO] [stderr]     |
[INFO] [stderr] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:488:33
[INFO] [stderr]     |
[INFO] [stderr] 488 |     let y = link_ops.right(ptr).unwrap_unchecked();
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:512:32
[INFO] [stderr]     |
[INFO] [stderr] 512 |     let y = link_ops.left(ptr).unwrap_unchecked();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:543:51
[INFO] [stderr]     |
[INFO] [stderr] 543 |         let grandparent = link_ops.parent(parent).unwrap_unchecked();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:566:36
[INFO] [stderr]     |
[INFO] [stderr] 566 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:568:36
[INFO] [stderr]     |
[INFO] [stderr] 568 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:592:36
[INFO] [stderr]     |
[INFO] [stderr] 592 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:594:36
[INFO] [stderr]     |
[INFO] [stderr] 594 |             x = link_ops.parent(x).unwrap_unchecked();
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:607:29
[INFO] [stderr]     |
[INFO] [stderr] 607 |         next(link_ops, ptr).unwrap_unchecked()
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:643:46
[INFO] [stderr]     |
[INFO] [stderr] 643 |         link_ops.set_parent(link_ops.left(y).unwrap_unchecked(), Some(y));
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:654:27
[INFO] [stderr]     |
[INFO] [stderr] 654 |             let mut w = w.unwrap_unchecked();
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:656:55
[INFO] [stderr]     |
[INFO] [stderr] 656 |                 let mut w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:663:53
[INFO] [stderr]     |
[INFO] [stderr] 663 | ...                   .right(link_ops.left(w).unwrap_unchecked())
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:664:30
[INFO] [stderr]     |
[INFO] [stderr] 664 | ...                   .unwrap_unchecked();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:665:55
[INFO] [stderr]     |
[INFO] [stderr] 665 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:678:71
[INFO] [stderr]     |
[INFO] [stderr] 678 |                         let w_grandparent = link_ops.parent(w_parent).unwrap_unchecked();
[INFO] [stderr]     |                                                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:680:59
[INFO] [stderr]     |
[INFO] [stderr] 680 | ...                   link_ops.right(w_grandparent).unwrap_unchecked()
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:682:58
[INFO] [stderr]     |
[INFO] [stderr] 682 | ...                   link_ops.left(w_grandparent).unwrap_unchecked()
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:686:65
[INFO] [stderr]     |
[INFO] [stderr] 686 | ...                   link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stderr]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:689:52
[INFO] [stderr]     |
[INFO] [stderr] 689 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:690:59
[INFO] [stderr]     |
[INFO] [stderr] 690 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:694:62
[INFO] [stderr]     |
[INFO] [stderr] 694 |                         link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:704:53
[INFO] [stderr]     |
[INFO] [stderr] 704 | ...                   .left(link_ops.right(w).unwrap_unchecked())
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:705:30
[INFO] [stderr]     |
[INFO] [stderr] 705 | ...                   .unwrap_unchecked();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:706:55
[INFO] [stderr]     |
[INFO] [stderr] 706 |                         w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:721:55
[INFO] [stderr]     |
[INFO] [stderr] 721 | ...                   link_ops.parent(w_parent).unwrap_unchecked(),
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:724:66
[INFO] [stderr]     |
[INFO] [stderr] 724 | ...                   .right(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:725:34
[INFO] [stderr]     |
[INFO] [stderr] 725 | ...                   .unwrap_unchecked()
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:728:65
[INFO] [stderr]     |
[INFO] [stderr] 728 | ...                   .left(link_ops.parent(w_parent).unwrap_unchecked())
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:729:34
[INFO] [stderr]     |
[INFO] [stderr] 729 | ...                   .unwrap_unchecked()
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:733:66
[INFO] [stderr]     |
[INFO] [stderr] 733 | ...                   link_ops.set_color(link_ops.right(w).unwrap_unchecked(), Color::Black);
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:736:52
[INFO] [stderr]     |
[INFO] [stderr] 736 | ...                   w = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:737:59
[INFO] [stderr]     |
[INFO] [stderr] 737 | ...                   w_parent = link_ops.parent(w).unwrap_unchecked();
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/rbtree.rs:741:61
[INFO] [stderr]     |
[INFO] [stderr] 741 |                         link_ops.set_color(link_ops.left(w).unwrap_unchecked(), Color::Black);
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/rbtree.rs:1069:60
[INFO] [stderr]      |
[INFO] [stderr] 1069 |                         let next = next(link_ops, current).unwrap_unchecked();
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]     --> src/rbtree.rs:1111:60
[INFO] [stderr]      |
[INFO] [stderr] 1111 |                         let prev = prev(link_ops, current).unwrap_unchecked();
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]      = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/xor_linked_list.rs:720:38
[INFO] [stderr]     |
[INFO] [stderr] 720 |                 let head = list.head.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/xor_linked_list.rs:721:38
[INFO] [stderr]     |
[INFO] [stderr] 721 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/xor_linked_list.rs:758:38
[INFO] [stderr]     |
[INFO] [stderr] 758 |                 let head = list.head.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]    --> src/xor_linked_list.rs:759:38
[INFO] [stderr]     |
[INFO] [stderr] 759 |                 let tail = list.tail.unwrap_unchecked();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]     = help: call with fully qualified syntax `UncheckedOptionExt::unwrap_unchecked(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: `intrusive-collections` (lib) generated 43 warnings
[INFO] [stderr] warning: unused attribute `deny`
[INFO] [stderr]    --> src/adapter.rs:277:5
[INFO] [stderr]     |
[INFO] [stderr] 277 |     #[deny(missing_docs)]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] note: the built-in attribute `deny` will be ignored, since it's applied to the macro invocation `intrusive_adapter`
[INFO] [stderr]    --> src/adapter.rs:278:5
[INFO] [stderr]     |
[INFO] [stderr] 278 |     intrusive_adapter! {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `intrusive-collections` (lib test) generated 44 warnings (43 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/intrusive_collections-ee656794e1e1b2fa)
[INFO] [stdout] 
[INFO] [stdout] running 57 tests
[INFO] [stdout] test linked_list::tests::test_clone_pointer_arc ... ok
[INFO] [stdout] test linked_list::tests::test_force_unlink ... ok
[INFO] [stdout] test linked_list::tests::test_cursor ... ok
[INFO] [stdout] test linked_list::tests::test_clone_pointer_rc ... ok
[INFO] [stdout] test linked_list::tests::test_iter ... ok
[INFO] [stdout] test linked_list::tests::test_link ... ok
[INFO] [stdout] test linked_list::tests::test_multi_list ... ok
[INFO] [stdout] test linked_list::tests::test_non_static ... ok
[INFO] [stdout] test linked_list::tests::test_push_pop ... ok
[INFO] [stdout] test linked_list::tests::test_split_splice ... ok
[INFO] [stdout] test pointer_ops::tests::clone_arc_from_raw ... ok
[INFO] [stdout] test pointer_ops::tests::clone_pin_arc_from_raw ... ok
[INFO] [stdout] test pointer_ops::tests::clone_pin_rc_from_raw ... ok
[INFO] [stdout] test pointer_ops::tests::clone_rc_from_raw ... ok
[INFO] [stdout] test pointer_ops::tests::test_arc ... ok
[INFO] [stdout] test pointer_ops::tests::test_arc_unsized ... ok
[INFO] [stdout] test pointer_ops::tests::test_box ... ok
[INFO] [stdout] test pointer_ops::tests::test_box_unsized ... ok
[INFO] [stdout] test pointer_ops::tests::test_pin_arc ... ok
[INFO] [stdout] test pointer_ops::tests::test_pin_box ... ok
[INFO] [stdout] test rbtree::tests::test_cursor ... ok
[INFO] [stdout] test rbtree::tests::test_non_static ... ok
[INFO] [stdout] test rbtree::tests::test_clone_pointer_arc ... ok
[INFO] [stdout] test rbtree::tests::test_iter ... ok
[INFO] [stdout] test rbtree::tests::test_fast_clear ... ok
[INFO] [stdout] test pointer_ops::tests::test_pin_rc ... ok
[INFO] [stdout] test pointer_ops::tests::test_pin_box_unsized ... ok
[INFO] [stdout] test pointer_ops::tests::test_rc ... ok
[INFO] [stdout] test pointer_ops::tests::test_rc_unsized ... ok
[INFO] [stdout] test singly_linked_list::tests::test_clone_pointer_arc ... ok
[INFO] [stdout] test pointer_ops::tests::test_pin_arc_unsized ... ok
[INFO] [stdout] test rbtree::tests::test_find ... ok
[INFO] [stdout] test rbtree::tests::test_entry ... ok
[INFO] [stdout] test rbtree::tests::test_link ... ok
[INFO] [stdout] test rbtree::tests::test_clone_pointer_rc ... ok
[INFO] [stdout] test pointer_ops::tests::test_pin_rc_unsized ... ok
[INFO] [stdout] test singly_linked_list::tests::test_clone_pointer_rc ... ok
[INFO] [stdout] test singly_linked_list::tests::test_cursor ... ok
[INFO] [stdout] test rbtree::tests::test_insert_remove ... ok
[INFO] [stdout] test singly_linked_list::tests::test_iter ... ok
[INFO] [stdout] test singly_linked_list::tests::test_fast_clear ... ok
[INFO] [stdout] test singly_linked_list::tests::test_link ... ok
[INFO] [stdout] test singly_linked_list::tests::test_multi_list ... ok
[INFO] [stdout] test singly_linked_list::tests::test_split_splice ... ok
[INFO] [stdout] test xor_linked_list::tests::test_clone_pointer_arc ... ok
[INFO] [stdout] test singly_linked_list::tests::test_non_static ... ok
[INFO] [stdout] test xor_linked_list::tests::test_cursor ... ok
[INFO] [stdout] test xor_linked_list::tests::test_drop ... ok
[INFO] [stdout] test xor_linked_list::tests::test_clone_pointer_rc ... ok
[INFO] [stdout] test xor_linked_list::tests::test_link ... ok
[INFO] [stdout] test xor_linked_list::tests::test_multi_list ... ok
[INFO] [stdout] test xor_linked_list::tests::test_non_static ... ok
[INFO] [stdout] test xor_linked_list::tests::test_split_splice ... ok
[INFO] [stdout] test xor_linked_list::tests::test_force_unlink ... ok
[INFO] [stdout] test xor_linked_list::tests::test_reverse ... ok
[INFO] [stdout] test xor_linked_list::tests::test_iter ... ok
[INFO] [stdout] test xor_linked_list::tests::test_push_pop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 57 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.33s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests intrusive-collections
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test src/adapter.rs - adapter::intrusive_adapter (line 116) ... ignored
[INFO] [stdout] test src/adapter.rs - adapter::intrusive_adapter (line 127) ... ignored
[INFO] [stdout] test src/adapter.rs - adapter::intrusive_adapter (line 145) ... ok
[INFO] [stdout] test src/adapter.rs - adapter::container_of (line 85) ... ok
[INFO] [stdout] test src/lib.rs - (line 152) ... ok
[INFO] [stdout] test src/key_adapter.rs - key_adapter::KeyAdapter (line 21) ... ok
[INFO] [stdout] test src/lib.rs - (line 91) ... ok
[INFO] [stdout] test src/lib.rs - (line 23) ... ok
[INFO] [stdout] test src/lib.rs - (line 188) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 1.29s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "739b1248fef2fe235de4ccdb8b96c781527856bf46e7507589263416275c1469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "739b1248fef2fe235de4ccdb8b96c781527856bf46e7507589263416275c1469", kill_on_drop: false }`
[INFO] [stdout] 739b1248fef2fe235de4ccdb8b96c781527856bf46e7507589263416275c1469